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CVE-2026-46300 Known exploited

net: skbuff: preserve shared-frag marker during coalescing

Products / packages Linux · Red Hat NVIDIA for RHEL 10 · Red Hat Enterprise Linux 10 · 30 more

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Severity and exploitation

Known exploited
KEV checked 05/11/2026, 06:00:33 UTCAdded 2026-10-28
Linux · CVSS:3.1 · 7.8
Assessment vectorCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
redhat-SADP · CVSS:3.1 · 7.8
Assessment vectorCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
The headline uses the highest imported catalog score. Assessments can differ by source and CVSS version.

Severity

high7.8

CVSS measures technical severity, not the likelihood of an attack.

Known exploitation

Confirmed exploited · CISA KEV

CISA has recorded exploitation in the wild. Review its required action.

Public exploit

Exploit reference published

Source-linked evidence; not proof of attacks in the wild or independent validation.

Remediation

Source guidance available

Review the recorded instructions. Guidance may be a workaround rather than a fixed version.

What this means

In the Linux kernel, the following vulnerability has been resolved:

Source excerpt · Linux

Attack conditions

No attack-condition excerpt has been identified here. Review the full source description and references for authentication, network access, and configuration requirements.

Review supporting sources →

Affected versions

Check the exact model, release, and any platform requirements against your installation.

Linux · Linux

Linux

8 ranges

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affected

cef401de7be8c4e155c6746bfccf721a4fa5fab9 → before 3599e6b3cc1ada96883d496a50a210d3afbb6987

git versions

cef401de7be8c4e155c6746bfccf721a4fa5fab9 → before 2f2b16022a2e10ca7bccfb98db5ed2ec0f72641c

git versions

cef401de7be8c4e155c6746bfccf721a4fa5fab9 → before 9d3e5fd19fe1063bf607219e8562fbd567b8e8d5

git versions

cef401de7be8c4e155c6746bfccf721a4fa5fab9 → before 78bf6b6bb19541d19fbda6242e7cfe2c682763c0

git versions

cef401de7be8c4e155c6746bfccf721a4fa5fab9 → before 760e1addc27ba1a7beb4a0a7e8b3e9ec49e7a34e

git versions

cef401de7be8c4e155c6746bfccf721a4fa5fab9 → before 3bd9e113d50034db99d7ef69fd8e5242d15e414a

git versions

cef401de7be8c4e155c6746bfccf721a4fa5fab9 → before 3884358a9286b17f389a72b1426fc4547c23c111

git versions

cef401de7be8c4e155c6746bfccf721a4fa5fab9 → before f84eca5817390257cef78013d0112481c503b4a3

git versions

unaffected

unknown

Other versions: unaffected

Linux · Linux

Linux

10 ranges

Compare with this publisher’s ranges. This does not inspect your installation.

affected

3.9

unaffected

0 → before 3.9

semver versions

5.10.257 → through 5.10.*

semver versions

5.15.208 → through 5.15.*

semver versions

6.1.174 → through 6.1.*

semver versions

6.6.141 → through 6.6.*

semver versions

6.12.91 → through 6.12.*

semver versions

6.18.33 → through 6.18.*

semver versions

7.0.10 → through 7.0.*

semver versions

7.1 → through *

original_commit_for_fix versions

unknown

Other versions: affected

Red Hat · redhat-SADP

NVIDIA for RHEL 10

2 ranges

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affected

unaffected

0:6.12.0-211.8.el10nv → before *

rpm versions

0:6.12.0-231.12.el10nv → before *

rpm versions

unknown

Other versions: affected

Product identifiers (CPE)cpe:/a:redhat:enterprise_linux_nvidia:10::el10

Red Hat · redhat-SADP

Red Hat Enterprise Linux 10

1 range

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affected

unaffected

0:6.12.0-211.16.1.el10_2 → before *

rpm versions

unknown

Other versions: affected

Product identifiers (CPE)cpe:/o:redhat:enterprise_linux:10.2

Red Hat · redhat-SADP

Red Hat Enterprise Linux 10.0 Extended Update Support

1 range

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affected

unaffected

0:6.12.0-55.75.1.el10_0 → before *

rpm versions

unknown

Other versions: affected

Product identifiers (CPE)cpe:/o:redhat:enterprise_linux_eus:10.0

Red Hat · redhat-SADP

Red Hat Enterprise Linux 8

1 range

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affected

unaffected

0:4.18.0-553.125.1.rt7.466.el8_10 → before *

rpm versions

unknown

Other versions: affected

Product identifiers (CPE)cpe:/a:redhat:enterprise_linux:8::nfv

Red Hat · redhat-SADP

Red Hat Enterprise Linux 8

1 range

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affected

unaffected

0:4.18.0-553.125.1.el8_10 → before *

rpm versions

unknown

Other versions: affected

Product identifiers (CPE)cpe:/o:redhat:enterprise_linux:8

Red Hat · redhat-SADP

Red Hat Enterprise Linux 8

0 ranges

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affected

unaffected

unknown

Other versions: unaffected

Product identifiers (CPE)cpe:/o:redhat:enterprise_linux:8

Red Hat · redhat-SADP

Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support

1 range

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affected

unaffected

0:4.18.0-305.192.1.el8_4 → before *

rpm versions

unknown

Other versions: affected

Product identifiers (CPE)cpe:/o:redhat:rhel_aus:8.4

Red Hat · redhat-SADP

Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On

1 range

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affected

unaffected

0:4.18.0-305.192.1.el8_4 → before *

rpm versions

unknown

Other versions: affected

Product identifiers (CPE)cpe:/o:redhat:rhel_eus_long_life:8.4

Red Hat · redhat-SADP

Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support

1 range

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affected

unaffected

0:4.18.0-372.193.1.el8_6 → before *

rpm versions

unknown

Other versions: affected

Product identifiers (CPE)cpe:/o:redhat:rhel_aus:8.6

Red Hat · redhat-SADP

Red Hat Enterprise Linux 8.6 Telecommunications Update Service

1 range

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affected

unaffected

0:4.18.0-372.193.1.el8_6 → before *

rpm versions

unknown

Other versions: affected

Product identifiers (CPE)cpe:/o:redhat:rhel_tus:8.6

Red Hat · redhat-SADP

Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions

1 range

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affected

unaffected

0:4.18.0-372.193.1.el8_6 → before *

rpm versions

unknown

Other versions: affected

Product identifiers (CPE)cpe:/o:redhat:rhel_e4s:8.6

Red Hat · redhat-SADP

Red Hat Enterprise Linux 8.8 Telecommunications Update Service

1 range

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affected

unaffected

0:4.18.0-477.143.1.el8_8 → before *

rpm versions

unknown

Other versions: affected

Product identifiers (CPE)cpe:/o:redhat:rhel_tus:8.8

Red Hat · redhat-SADP

Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions

1 range

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affected

unaffected

0:4.18.0-477.143.1.el8_8 → before *

rpm versions

unknown

Other versions: affected

Product identifiers (CPE)cpe:/o:redhat:rhel_e4s:8.8

Red Hat · redhat-SADP

Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions

0 ranges

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affected

unaffected

unknown

Other versions: unaffected

Product identifiers (CPE)cpe:/o:redhat:rhel_e4s:8.8

Red Hat · redhat-SADP

Red Hat Enterprise Linux 9

1 range

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affected

unaffected

0:5.14.0-687.10.1.el9_8 → before *

rpm versions

unknown

Other versions: affected

Product identifiers (CPE)cpe:/a:redhat:enterprise_linux:9cpe:/o:redhat:enterprise_linux:9

Red Hat · redhat-SADP

Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions

1 range

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affected

unaffected

0:5.14.0-70.180.1.el9_0 → before *

rpm versions

unknown

Other versions: affected

Product identifiers (CPE)cpe:/a:redhat:rhel_e4s:9.0

Red Hat · redhat-SADP

Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions

1 range

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affected

unaffected

0:5.14.0-70.180.1.rt21.252.el9_0 → before *

rpm versions

unknown

Other versions: affected

Product identifiers (CPE)cpe:/a:redhat:rhel_e4s:9.0::nfv

Red Hat · redhat-SADP

Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions

1 range

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affected

unaffected

0:5.14.0-284.172.1.el9_2 → before *

rpm versions

unknown

Other versions: affected

Product identifiers (CPE)cpe:/a:redhat:rhel_e4s:9.2

Red Hat · redhat-SADP

Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions

1 range

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affected

unaffected

0:5.14.0-284.172.1.rt14.457.el9_2 → before *

rpm versions

unknown

Other versions: affected

Product identifiers (CPE)cpe:/a:redhat:rhel_e4s:9.2::nfv

Red Hat · redhat-SADP

Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions

0 ranges

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affected

unaffected

unknown

Other versions: unaffected

Product identifiers (CPE)cpe:/o:redhat:rhel_e4s:9.2

Red Hat · redhat-SADP

Red Hat Enterprise Linux 9.4 Extended Update Support

1 range

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affected

unaffected

0:5.14.0-427.126.1.el9_4 → before *

rpm versions

unknown

Other versions: affected

Product identifiers (CPE)cpe:/a:redhat:rhel_eus:9.4

Red Hat · redhat-SADP

Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions

0 ranges

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affected

unaffected

unknown

Other versions: unaffected

Product identifiers (CPE)cpe:/o:redhat:rhel_e4s:9.4

Red Hat · redhat-SADP

Red Hat Enterprise Linux 9.6 Extended Update Support

1 range

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affected

unaffected

0:5.14.0-570.116.1.el9_6 → before *

rpm versions

unknown

Other versions: affected

Product identifiers (CPE)cpe:/a:redhat:rhel_eus:9.6

Red Hat · redhat-SADP

Red Hat Enterprise Linux 9.6 Extended Update Support

0 ranges

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affected

unaffected

unknown

Other versions: unaffected

Product identifiers (CPE)cpe:/o:redhat:rhel_eus:9.6

Red Hat · redhat-SADP

Red Hat OpenShift Container Platform 4.12

1 range

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affected

unaffected

412.86.202605271418-0 → before *

rpm versions

unknown

Other versions: affected

Product identifiers (CPE)cpe:/a:redhat:openshift:4.12::el8

Red Hat · redhat-SADP

Red Hat OpenShift Container Platform 4.13

1 range

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affected

unaffected

413.92.202605271328-0 → before *

rpm versions

unknown

Other versions: affected

Product identifiers (CPE)cpe:/a:redhat:openshift:4.13::el9

Red Hat · redhat-SADP

Red Hat OpenShift Container Platform 4.14

1 range

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affected

unaffected

414.92.202606231112-0 → before *

rpm versions

unknown

Other versions: affected

Product identifiers (CPE)cpe:/a:redhat:openshift:4.14::el9

Red Hat · redhat-SADP

Red Hat OpenShift Container Platform 4.15

1 range

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affected

unaffected

415.92.202606030318-0 → before *

rpm versions

unknown

Other versions: affected

Product identifiers (CPE)cpe:/a:redhat:openshift:4.15::el9

Red Hat · redhat-SADP

Red Hat OpenShift Container Platform 4.16

2 ranges

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affected

unaffected

416.94.202605200242-0 → before *

rpm versions

416.94.202606051757-0 → before *

rpm versions

unknown

Other versions: affected

Product identifiers (CPE)cpe:/a:redhat:openshift:4.16::el9

Red Hat · redhat-SADP

Red Hat OpenShift Container Platform 4.17

1 range

Compare with this publisher’s ranges. This does not inspect your installation.

affected

unaffected

417.94.202606250942-0 → before *

rpm versions

unknown

Other versions: affected

Product identifiers (CPE)cpe:/a:redhat:openshift:4.17::el9

Red Hat · redhat-SADP

Red Hat OpenShift Container Platform 4.18

1 range

Compare with this publisher’s ranges. This does not inspect your installation.

affected

unaffected

418.94.202605260517-0 → before *

rpm versions

unknown

Other versions: affected

Product identifiers (CPE)cpe:/a:redhat:openshift:4.18::el9

Red Hat · redhat-SADP

Red Hat OpenShift Container Platform 4.19

1 range

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affected

unaffected

4.19.9.6.202606031700-0 → before *

rpm versions

unknown

Other versions: affected

Product identifiers (CPE)cpe:/a:redhat:openshift:4.19::el9

Red Hat · redhat-SADP

Red Hat OpenShift Container Platform 4.20

1 range

Compare with this publisher’s ranges. This does not inspect your installation.

affected

unaffected

4.20.9.6.202605270908-0 → before *

rpm versions

unknown

Other versions: affected

Product identifiers (CPE)cpe:/a:redhat:openshift:4.20::el9

Red Hat · redhat-SADP

Red Hat OpenShift Container Platform 4.21

1 range

Compare with this publisher’s ranges. This does not inspect your installation.

affected

unaffected

0:5.14.0-570.116.1.el9_6 → before *

rpm versions

unknown

Other versions: affected

Product identifiers (CPE)cpe:/a:redhat:openshift:4.21::el8

Red Hat · redhat-SADP

Red Hat OpenShift Container Platform 4.21

1 range

Compare with this publisher’s ranges. This does not inspect your installation.

affected

unaffected

0:4.21.0-202605142021.p2.geab2218.assembly.stream.el10 → before *

rpm versions

unknown

Other versions: affected

Product identifiers (CPE)cpe:/a:redhat:openshift:4.21::el8

Red Hat · redhat-SADP

Red Hat OpenShift Container Platform 4.21

1 range

Compare with this publisher’s ranges. This does not inspect your installation.

affected

unaffected

4.21.9.6.202606030721-0 → before *

rpm versions

unknown

Other versions: affected

Product identifiers (CPE)cpe:/a:redhat:openshift:4.21::el9

Red Hat · redhat-SADP

Red Hat Enterprise Linux 6

0 ranges

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affected

unaffected

unknown

Other versions: unaffected

Product identifiers (CPE)cpe:/o:redhat:enterprise_linux:6

Red Hat · redhat-SADP

Red Hat Enterprise Linux 7

0 ranges

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affected

unaffected

unknown

Other versions: unaffected

Product identifiers (CPE)cpe:/o:redhat:enterprise_linux:7

Red Hat · redhat-SADP

Red Hat Enterprise Linux 7

0 ranges

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affected

unaffected

unknown

Other versions: unaffected

Product identifiers (CPE)cpe:/o:redhat:enterprise_linux:7

Siemens · siemens-SADP

SIMATIC S7-1500 CPU 1518-4 PN/DP MFP

1 range

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affected

V3.1.6 → before V3.1.7

custom versions

unaffected

unknown

Other versions: unknown

Siemens · siemens-SADP

SIMATIC S7-1500 CPU 1518-4 PN/DP MFP

1 range

Compare with this publisher’s ranges. This does not inspect your installation.

affected

V3.1.5 → before *

custom versions

unaffected

unknown

Other versions: unknown

Siemens · siemens-SADP

SIMATIC S7-1500 CPU 1518-4 PN/DP MFP

1 range

Compare with this publisher’s ranges. This does not inspect your installation.

affected

V3.1.6 → before V3.1.7

custom versions

unaffected

unknown

Other versions: unknown

Siemens · siemens-SADP

SIMATIC S7-1500 CPU 1518-4 PN/DP MFP

1 range

Compare with this publisher’s ranges. This does not inspect your installation.

affected

V3.1.5 → before *

custom versions

unaffected

unknown

Other versions: unknown

Siemens · siemens-SADP

SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP

1 range

Compare with this publisher’s ranges. This does not inspect your installation.

affected

V3.1.6 → before V3.1.7

custom versions

unaffected

unknown

Other versions: unknown

Siemens · siemens-SADP

SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP

1 range

Compare with this publisher’s ranges. This does not inspect your installation.

affected

V3.1.5 → before *

custom versions

unaffected

unknown

Other versions: unknown

Siemens · siemens-SADP

SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP

1 range

Compare with this publisher’s ranges. This does not inspect your installation.

affected

V3.1.6 → before V3.1.7

custom versions

unaffected

unknown

Other versions: unknown

Siemens · siemens-SADP

SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP

1 range

Compare with this publisher’s ranges. This does not inspect your installation.

affected

V3.1.5 → before *

custom versions

unaffected

unknown

Other versions: unknown

Siemens · siemens-SADP

SIPLUS S7-1500 CPU 1518-4 PN/DP MFP

1 range

Compare with this publisher’s ranges. This does not inspect your installation.

affected

V3.1.6 → before V3.1.7

custom versions

unaffected

unknown

Other versions: unknown

Siemens · siemens-SADP

SIPLUS S7-1500 CPU 1518-4 PN/DP MFP

1 range

Compare with this publisher’s ranges. This does not inspect your installation.

affected

V3.1.5 → before *

custom versions

unaffected

unknown

Other versions: unknown

Automatic dependency matching is unavailable for this record. Use the product evidence and publisher’s instructions to check your installation.

What to do

Compare your installed product and version with the affected versions above. A matching product name alone does not confirm exposure.

RHSA-2026:19540: NVIDIA for RHEL 10

redhat-SADP guidance ↗

RHSA-2026:33486: NVIDIA for RHEL 10

redhat-SADP guidance ↗

RHBA-2026:20032: Red Hat OpenShift Container Platform 4.21

redhat-SADP guidance ↗

RHSA-2026:21695: Red Hat OpenShift Container Platform 4.12

redhat-SADP guidance ↗

RHSA-2026:21690: Red Hat OpenShift Container Platform 4.13

redhat-SADP guidance ↗

RHSA-2026:28887: Red Hat OpenShift Container Platform 4.14

redhat-SADP guidance ↗

RHSA-2026:23233: Red Hat OpenShift Container Platform 4.15

redhat-SADP guidance ↗

RHSA-2026:20087: Red Hat OpenShift Container Platform 4.16

redhat-SADP guidance ↗

RHSA-2026:25044: Red Hat OpenShift Container Platform 4.16

redhat-SADP guidance ↗

RHSA-2026:34098: Red Hat OpenShift Container Platform 4.17

redhat-SADP guidance ↗

RHSA-2026:21656: Red Hat OpenShift Container Platform 4.18

redhat-SADP guidance ↗

RHSA-2026:23245: Red Hat OpenShift Container Platform 4.19

redhat-SADP guidance ↗

RHSA-2026:21702: Red Hat OpenShift Container Platform 4.20

redhat-SADP guidance ↗

RHSA-2026:23240: Red Hat OpenShift Container Platform 4.21

redhat-SADP guidance ↗

RHSA-2026:20299: Red Hat Enterprise Linux AppStream EUS (v. 10.0), Red Hat Enterprise Linux BaseOS EUS (v. 10.0), Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0), Red Hat Enterprise Linux Real Time EUS (v. 10.0), Red Hat Enterprise Linux Real Time for NFV EUS (v. 10.0)

redhat-SADP guidance ↗

RHSA-2026:19569: Red Hat Enterprise Linux AppStream (v. 10), Red Hat Enterprise Linux BaseOS (v. 10), Red Hat Enterprise Linux CodeReady Linux Builder (v. 10), Red Hat Enterprise Linux Real Time (v. 10), Red Hat Enterprise Linux Real Time for NFV (v. 10)

redhat-SADP guidance ↗

RHSA-2026:19705: Red Hat Enterprise Linux AppStream E4S (v.9.0), Red Hat Enterprise Linux BaseOS E4S (v.9.0)

redhat-SADP guidance ↗

RHSA-2026:20593: Red Hat Enterprise Linux AppStream E4S (v.9.2), Red Hat Enterprise Linux BaseOS E4S (v.9.2)

redhat-SADP guidance ↗

RHSA-2026:20054: Red Hat CodeReady Linux Builder EUS (v.9.4), Red Hat Enterprise Linux AppStream EUS (v.9.4), Red Hat Enterprise Linux BaseOS EUS (v.9.4), Red Hat Enterprise Linux Real Time EUS (v.9.4), Red Hat Enterprise Linux Real Time for NFV EUS (v.9.4)

redhat-SADP guidance ↗

RHSA-2026:20129: Red Hat CodeReady Linux Builder EUS (v.9.6), Red Hat Enterprise Linux AppStream EUS (v.9.6), Red Hat Enterprise Linux BaseOS EUS (v.9.6), Red Hat Enterprise Linux Real Time EUS (v.9.6), Red Hat Enterprise Linux Real Time for NFV EUS (v.9.6)

redhat-SADP guidance ↗

RHSA-2026:19568: Red Hat Enterprise Linux AppStream (v. 9), Red Hat Enterprise Linux BaseOS (v. 9), Red Hat Enterprise Linux CodeReady Linux Builder (v. 9), Red Hat Enterprise Linux Real Time (v. 9), Red Hat Enterprise Linux Real Time for NFV (v. 9)

redhat-SADP guidance ↗

RHSA-2026:19666: Red Hat Enterprise Linux BaseOS (v. 8), Red Hat Enterprise Linux CRB (v. 8)

redhat-SADP guidance ↗

RHSA-2026:23470: Red Hat Enterprise Linux BaseOS (v. 8)

redhat-SADP guidance ↗

RHSA-2026:20130: Red Hat Enterprise Linux BaseOS AUS (v.8.4), Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4)

redhat-SADP guidance ↗

RHSA-2026:20051: Red Hat Enterprise Linux BaseOS AUS (v.8.6), Red Hat Enterprise Linux BaseOS E4S (v.8.6), Red Hat Enterprise Linux BaseOS TUS (v.8.6)

redhat-SADP guidance ↗

RHSA-2026:19521: Red Hat Enterprise Linux BaseOS E4S (v.8.8), Red Hat Enterprise Linux BaseOS TUS (v.8.8)

redhat-SADP guidance ↗

RHSA-2026:23471: Red Hat Enterprise Linux BaseOS E4S (v.8.8)

redhat-SADP guidance ↗

RHSA-2026:23469: Red Hat Enterprise Linux BaseOS E4S (v.9.2)

redhat-SADP guidance ↗

RHSA-2026:24814: Red Hat Enterprise Linux BaseOS E4S (v.9.4)

redhat-SADP guidance ↗

RHSA-2026:23468: Red Hat Enterprise Linux BaseOS EUS (v.9.6)

redhat-SADP guidance ↗

RHSA-2026:19664: Red Hat Enterprise Linux NFV (v. 8), Red Hat Enterprise Linux RT (v. 8)

redhat-SADP guidance ↗

RHSA-2026:19711: Red Hat Enterprise Linux NFV E4S (v.9.0), Red Hat Enterprise Linux Real Time E4S (v.9.0)

redhat-SADP guidance ↗

RHSA-2026:19875: Red Hat Enterprise Linux Real Time E4S (v.9.2), Red Hat Enterprise Linux Real Time for NFV E4S (v.9.2)

redhat-SADP guidance ↗

See the security bulletin for a detailed mitigation procedure.

redhat-SADP guidance ↗

Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.

CISA required action ↗

cve.new guidance unless attributed to a publisher. This page does not inspect your installation.

Public exploit evidence

The sources identify public exploit references. We have not independently tested them; their availability does not establish exploitation in the wild.

www.exploit-db.com/exploits/52591 ↗Attributed to Exploit-DB

Original source description

Read the full publisher description

In the Linux kernel, the following vulnerability has been resolved:

net: skbuff: preserve shared-frag marker during coalescing

skb_try_coalesce() can attach paged frags from @from to @to. If @from has SKBFL_SHARED_FRAG set, the resulting @to skb can contain the same externally-owned or page-cache-backed frags, but the shared-frag marker is currently lost.

That breaks the invariant relied on by later in-place writers. In particular, ESP input checks skb_has_shared_frag() before deciding whether an uncloned nonlinear skb can skip skb_cow_data(). If TCP receive coalescing has moved shared frags into an unmarked skb, ESP can see skb_has_shared_frag() as false and decrypt in place over page-cache backed frags.

Propagate SKBFL_SHARED_FRAG when skb_try_coalesce() transfers paged frags. The tailroom copy path does not need the marker because it copies bytes into @to's linear data rather than transferring frag descriptors.

References

51 sources
View 45 more references
access.redhat.com/errata/RHSA-2026:23233
Vendor advisoryredhat-SADP
access.redhat.com/errata/RHSA-2026:20087
Vendor advisoryredhat-SADP
access.redhat.com/errata/RHSA-2026:25044
Vendor advisoryredhat-SADP
access.redhat.com/errata/RHSA-2026:34098
Vendor advisoryredhat-SADP
access.redhat.com/errata/RHSA-2026:21656
Vendor advisoryredhat-SADP
access.redhat.com/errata/RHSA-2026:23245
Vendor advisoryredhat-SADP
access.redhat.com/errata/RHSA-2026:21702
Vendor advisoryredhat-SADP
access.redhat.com/errata/RHSA-2026:23240
Vendor advisoryredhat-SADP
access.redhat.com/errata/RHSA-2026:20299
Vendor advisoryredhat-SADP
access.redhat.com/errata/RHSA-2026:19569
Vendor advisoryredhat-SADP
access.redhat.com/errata/RHSA-2026:19705
Vendor advisoryredhat-SADP
access.redhat.com/errata/RHSA-2026:20593
Vendor advisoryredhat-SADP
access.redhat.com/errata/RHSA-2026:20054
Vendor advisoryredhat-SADP
access.redhat.com/errata/RHSA-2026:20129
Vendor advisoryredhat-SADP
access.redhat.com/errata/RHSA-2026:19568
Vendor advisoryredhat-SADP
access.redhat.com/errata/RHSA-2026:19666
Vendor advisoryredhat-SADP
access.redhat.com/errata/RHSA-2026:23470
Vendor advisoryredhat-SADP
access.redhat.com/errata/RHSA-2026:20130
Vendor advisoryredhat-SADP
access.redhat.com/errata/RHSA-2026:20051
Vendor advisoryredhat-SADP
access.redhat.com/errata/RHSA-2026:19521
Vendor advisoryredhat-SADP
access.redhat.com/errata/RHSA-2026:23471
Vendor advisoryredhat-SADP
access.redhat.com/errata/RHSA-2026:23469
Vendor advisoryredhat-SADP
access.redhat.com/errata/RHSA-2026:24814
Vendor advisoryredhat-SADP
access.redhat.com/errata/RHSA-2026:23468
Vendor advisoryredhat-SADP
access.redhat.com/errata/RHSA-2026:19664
Vendor advisoryredhat-SADP
access.redhat.com/errata/RHSA-2026:19711
Vendor advisoryredhat-SADP
access.redhat.com/errata/RHSA-2026:19875
Vendor advisoryredhat-SADP
git.kernel.org/stable/c/3599e6b3cc1ada96883d496a50a210d3afbb6987
Source referenceLinux
git.kernel.org/stable/c/2f2b16022a2e10ca7bccfb98db5ed2ec0f72641c
Source referenceLinux
git.kernel.org/stable/c/9d3e5fd19fe1063bf607219e8562fbd567b8e8d5
Source referenceLinux
git.kernel.org/stable/c/78bf6b6bb19541d19fbda6242e7cfe2c682763c0
Source referenceLinux
git.kernel.org/stable/c/760e1addc27ba1a7beb4a0a7e8b3e9ec49e7a34e
Source referenceLinux
git.kernel.org/stable/c/3bd9e113d50034db99d7ef69fd8e5242d15e414a
Source referenceLinux
git.kernel.org/stable/c/3884358a9286b17f389a72b1426fc4547c23c111
Source referenceLinux
git.kernel.org/stable/c/f84eca5817390257cef78013d0112481c503b4a3
Source referenceLinux
www.openwall.com/lists/oss-security/2026/05/13/5
Security advisoryCVE
www.openwall.com/lists/oss-security/2026/05/21/11
Security advisoryCVE
www.openwall.com/lists/oss-security/2026/05/21/12
Security advisoryCVE
www.openwall.com/lists/oss-security/2026/05/21/13
Security advisoryCVE
access.redhat.com/security/cve/CVE-2026-46300
Security advisoryredhat-SADP
bugzilla.redhat.com/show_bug.cgi
Source referenceredhat-SADP
security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-46300.json
Security advisoryredhat-SADP
cert-portal.siemens.com/productcert/html/ssa-082556.html
Source referencesiemens-SADP
cert-portal.siemens.com/productcert/html/ssa-019113.html
Source referencesiemens-SADP
www.cisa.gov/known-exploited-vulnerabilities-catalog
Security advisoryCISA-ADP

Inside the record

Evidence available

Package identity · not supplied
Version evidence
Remediation guidance
Weakness classification
Additional publishers

Describes the evidence in this view, not whether the product is safe.

Original records

CVE-2026-46300

View the latest unmodified CVE JSON from the official source. It may be newer than this imported page.

cve.new JSON →

Underlying weaknesses

The source’s classification of what caused the vulnerability.

CWE-123 ↗

Write-what-where Condition

redhat-SADP

Related →
CWE-456 ↗

CWE-456 Missing Initialization of a Variable

CISA-ADP

Related →

Environment requirements

These conditions apply together as specified by the publisher. A matching product name alone does not establish exposure.

Linux · platform conditions

Any condition may hold

Vulnerable product

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

From (inclusive): 3.9

Before: 5.10.257

Vulnerable product

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

From (inclusive): 3.9

Before: 5.15.208

Vulnerable product

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

From (inclusive): 3.9

Before: 6.1.174

Vulnerable product

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

From (inclusive): 3.9

Before: 6.6.141

Vulnerable product

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

From (inclusive): 3.9

Before: 6.12.91

Vulnerable product

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

From (inclusive): 3.9

Before: 6.18.33

Vulnerable product

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

From (inclusive): 3.9

Before: 7.0.10

Vulnerable product

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

From (inclusive): 3.9

Before: 7.1

Original applicability statements
[
  {
    "nodes": [
      {
        "operator": "OR",
        "negate": false,
        "cpeMatch": [
          {
            "vulnerable": true,
            "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
            "versionStartIncluding": "3.9",
            "versionEndExcluding": "5.10.257"
          },
          {
            "vulnerable": true,
            "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
            "versionStartIncluding": "3.9",
            "versionEndExcluding": "5.15.208"
          },
          {
            "vulnerable": true,
            "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
            "versionStartIncluding": "3.9",
            "versionEndExcluding": "6.1.174"
          },
          {
            "vulnerable": true,
            "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
            "versionStartIncluding": "3.9",
            "versionEndExcluding": "6.6.141"
          },
          {
            "vulnerable": true,
            "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
            "versionStartIncluding": "3.9",
            "versionEndExcluding": "6.12.91"
          },
          {
            "vulnerable": true,
            "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
            "versionStartIncluding": "3.9",
            "versionEndExcluding": "6.18.33"
          },
          {
            "vulnerable": true,
            "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
            "versionStartIncluding": "3.9",
            "versionEndExcluding": "7.0.10"
          },
          {
            "vulnerable": true,
            "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
            "versionStartIncluding": "3.9",
            "versionEndExcluding": "7.1"
          }
        ]
      }
    ]
  }
]
Contributing organizations · 5
Linux

Assigning organization

2026-08-05
CVE

Additional data publisher

2026-05-23
redhat-SADP

Additional data publisher

2026-09-01
siemens-SADP

Additional data publisher

2026-10-15
CISA-ADP

Additional data publisher

2026-10-29

Timeline

All times UTC
  1. Advisory published

    Publication date supplied by the source.

  2. Added to CISA KEV

    CISA recorded known exploitation.

  3. Source updated

    Latest modification date supplied by the source.

  4. Last imported by cve.new

    Latest catalog import, not the date we first saw this advisory.

What changed

Follow changes
No substantive changes have been recorded here yet. History starts when cve.new observes a change after tracking is enabled; earlier edits are not reconstructed.

Large field values are marked as truncated previews. Original source snapshots remain retained.