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CVE-2026-46189

RDMA/vmw_pvrdma: Fix double free on pvrdma_alloc_ucontext() error path

Products / packages Linux · Red Hat Enterprise Linux 10 · Red Hat Enterprise Linux 8 · 12 more

Published

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Severity and exploitation

Not in CISA KEV

KEV coverage does not rule out exploitation.

KEV checked 14/11/2026, 22:20:30 UTC
redhat-SADP · CVSS:3.1 · 7
Assessment vectorCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Severity

high7.0

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

Known exploitation

Not listed in the checked CISA KEV catalog

Absence from CISA KEV does not rule out attacks.

Public exploit

Not established by this record

Missing evidence does not mean no public exploit exists.

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
Linux version evidence

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

affected

29c8d9eba550c6d73d17cc1618a9f5f2a7345aa1 → before 269967d7693304e1f06ed2dff4ebbbeeb397cda4

git versions

29c8d9eba550c6d73d17cc1618a9f5f2a7345aa1 → before 1df5711121cdc11e76b889408fdbe459feba1d39

git versions

29c8d9eba550c6d73d17cc1618a9f5f2a7345aa1 → before 3a231c34c5bc3d3cfc850b877758ec9fdaa8a483

git versions

29c8d9eba550c6d73d17cc1618a9f5f2a7345aa1 → before ecc36a82ecfcfdf3c6606d209f22ec5543c410e0

git versions

29c8d9eba550c6d73d17cc1618a9f5f2a7345aa1 → before 45d25e3ec17900bf5a9d6876ff16ceee31c4c0e0

git versions

29c8d9eba550c6d73d17cc1618a9f5f2a7345aa1 → before 0c63333ff97bd1275294fd12840a0efe9d7a4c59

git versions

29c8d9eba550c6d73d17cc1618a9f5f2a7345aa1 → before 935ee27d0904aa944cbcc979094c20e5ef62eead

git versions

29c8d9eba550c6d73d17cc1618a9f5f2a7345aa1 → before e38e86995df27f1f854063dab1f0c6a513db3faf

git versions

unaffected

unknown

Other versions: unaffected

Linux · Linux

Linux

10 ranges
Linux version evidence

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

affected

4.10

unaffected

0 → before 4.10

semver versions

5.10.258 → through 5.10.*

semver versions

5.15.209 → through 5.15.*

semver versions

6.1.175 → through 6.1.*

semver versions

6.6.140 → through 6.6.*

semver versions

6.12.88 → through 6.12.*

semver versions

6.18.30 → through 6.18.*

semver versions

7.0.7 → through 7.0.*

semver versions

7.1 → through *

original_commit_for_fix versions

unknown

Other versions: affected

Red Hat · redhat-SADP

Red Hat Enterprise Linux 10

1 range
redhat-SADP version evidence

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

affected

unaffected

0:6.12.0-211.29.1.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 8

1 range
redhat-SADP version evidence

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

affected

unaffected

0:4.18.0-553.139.1.rt7.480.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
redhat-SADP version evidence

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

affected

unaffected

0:4.18.0-553.139.1.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 8.4 Advanced Mission Critical Update Support

1 range
redhat-SADP version evidence

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

affected

unaffected

0:4.18.0-305.199.1.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
redhat-SADP version evidence

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

affected

unaffected

0:4.18.0-305.199.1.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
redhat-SADP version evidence

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

affected

unaffected

0:4.18.0-372.201.1.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 Extended Update Support Long-Life Add-On

1 range
redhat-SADP version evidence

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

affected

unaffected

0:4.18.0-372.201.1.el8_6 → before *

rpm versions

unknown

Other versions: affected

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

Red Hat · redhat-SADP

Red Hat Enterprise Linux 8.8 Telecommunications Update Service

1 range
redhat-SADP version evidence

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

affected

unaffected

0:4.18.0-477.152.1.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
redhat-SADP version evidence

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

affected

unaffected

0:4.18.0-477.152.1.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 9

1 range
redhat-SADP version evidence

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

affected

unaffected

0:5.14.0-687.19.1.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 9.2 Update Services for SAP Solutions

1 range
redhat-SADP version evidence

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

affected

unaffected

0:5.14.0-284.179.1.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
redhat-SADP version evidence

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

affected

unaffected

0:5.14.0-284.179.1.rt14.464.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 9.4 Update Services for SAP Solutions

1 range
redhat-SADP version evidence

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

affected

unaffected

0:5.14.0-427.136.1.el9_4 → before *

rpm versions

unknown

Other versions: affected

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

Red Hat · redhat-SADP

Red Hat Enterprise Linux 9.6 Extended Update Support

1 range
redhat-SADP version evidence

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

affected

unaffected

0:5.14.0-570.127.1.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 6

0 ranges
redhat-SADP version evidence

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

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
redhat-SADP version evidence

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

affected

unaffected

unknown

Other versions: affected

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

Red Hat · redhat-SADP

Red Hat Enterprise Linux 7

0 ranges
redhat-SADP version evidence

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

affected

unaffected

unknown

Other versions: affected

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

Red Hat · redhat-SADP

Red Hat Enterprise Linux 9

0 ranges
redhat-SADP version evidence

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

affected

unaffected

unknown

Other versions: affected

Product identifiers (CPE)cpe:/o:redhat:enterprise_linux:9
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-2026:33685: 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-2026:36073: Red Hat Enterprise Linux AppStream E4S (v.9.2), Red Hat Enterprise Linux BaseOS E4S (v.9.2)

redhat-SADP guidance ↗

RHSA-2026:36767: Red Hat Enterprise Linux AppStream E4S (v.9.4), Red Hat Enterprise Linux BaseOS E4S (v.9.4), Red Hat Enterprise Linux Real Time E4S (v.9.4), Red Hat Enterprise Linux Real Time for NFV E4S (v.9.4)

redhat-SADP guidance ↗

RHSA-2026:38902: 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-2026:30848: 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-2026:33743: Red Hat Enterprise Linux BaseOS (v. 8), Red Hat Enterprise Linux CRB (v. 8)

redhat-SADP guidance ↗

RHSA-2026:47633: Red Hat Enterprise Linux BaseOS AUS (v.8.4), Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4)

redhat-SADP guidance ↗

RHSA-2026:40068: Red Hat Enterprise Linux BaseOS AUS (v.8.6), Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.6)

redhat-SADP guidance ↗

RHSA-2026:40760: Red Hat Enterprise Linux BaseOS E4S (v.8.8), Red Hat Enterprise Linux BaseOS TUS (v.8.8)

redhat-SADP guidance ↗

RHSA-2026:36049: Red Hat Enterprise Linux NFV (v. 8), Red Hat Enterprise Linux RT (v. 8)

redhat-SADP guidance ↗

RHSA-2026:35904: 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 ↗

To mitigate this issue, prevent the vmw_pvrdma kernel module from loading. Create a file named /etc/modprobe.d/disable-vmw_pvrdma.conf with the following content: install vmw_pvrdma /bin/true. A system reboot is required for this change to take effect. Disabling this module may impact functionality if VMware paravirtual RDMA devices are actively used.

redhat-SADP guidance ↗

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

Public exploit evidence

No public exploit reference is identified in the imported evidence. This is not a claim that no exploit exists.

Original source description

Read the full publisher description

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

RDMA/vmw_pvrdma: Fix double free on pvrdma_alloc_ucontext() error path

Sashiko points out that pvrdma_uar_free() is already called within pvrdma_dealloc_ucontext(), so calling it before triggers a double free.

References

22 sources
access.redhat.com/errata/RHSA-2026:33685
Vendor advisoryredhat-SADP
access.redhat.com/errata/RHSA-2026:36073
Vendor advisoryredhat-SADP
access.redhat.com/errata/RHSA-2026:36767
Vendor advisoryredhat-SADP
access.redhat.com/errata/RHSA-2026:38902
Vendor advisoryredhat-SADP
access.redhat.com/errata/RHSA-2026:30848
Vendor advisoryredhat-SADP
access.redhat.com/errata/RHSA-2026:33743
Vendor advisoryredhat-SADP
View 16 more references
access.redhat.com/errata/RHSA-2026:47633
Vendor advisoryredhat-SADP
access.redhat.com/errata/RHSA-2026:40068
Vendor advisoryredhat-SADP
access.redhat.com/errata/RHSA-2026:40760
Vendor advisoryredhat-SADP
access.redhat.com/errata/RHSA-2026:36049
Vendor advisoryredhat-SADP
access.redhat.com/errata/RHSA-2026:35904
Vendor advisoryredhat-SADP
git.kernel.org/stable/c/269967d7693304e1f06ed2dff4ebbbeeb397cda4
Source referenceLinux
git.kernel.org/stable/c/1df5711121cdc11e76b889408fdbe459feba1d39
Source referenceLinux
git.kernel.org/stable/c/3a231c34c5bc3d3cfc850b877758ec9fdaa8a483
Source referenceLinux
git.kernel.org/stable/c/ecc36a82ecfcfdf3c6606d209f22ec5543c410e0
Source referenceLinux
git.kernel.org/stable/c/45d25e3ec17900bf5a9d6876ff16ceee31c4c0e0
Source referenceLinux
git.kernel.org/stable/c/0c63333ff97bd1275294fd12840a0efe9d7a4c59
Source referenceLinux
git.kernel.org/stable/c/935ee27d0904aa944cbcc979094c20e5ef62eead
Source referenceLinux
git.kernel.org/stable/c/e38e86995df27f1f854063dab1f0c6a513db3faf
Source referenceLinux
access.redhat.com/security/cve/CVE-2026-46189
Security advisoryredhat-SADP
bugzilla.redhat.com/show_bug.cgi
Source referenceredhat-SADP
security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-46189.json
Security advisoryredhat-SADP

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-2026-46189

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-763 ↗

Release of Invalid Pointer or Reference

redhat-SADP

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): 4.10

Before: 5.10.258

Vulnerable product

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

From (inclusive): 4.10

Before: 5.15.209

Vulnerable product

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

From (inclusive): 4.10

Before: 6.1.175

Vulnerable product

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

From (inclusive): 4.10

Before: 6.6.140

Vulnerable product

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

From (inclusive): 4.10

Before: 6.12.88

Vulnerable product

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

From (inclusive): 4.10

Before: 6.18.30

Vulnerable product

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

From (inclusive): 4.10

Before: 7.0.7

Vulnerable product

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

From (inclusive): 4.10

Before: 7.1

Applicability preview
[
  {
    "nodes": [
      {
        "operator": "OR",
        "negate": false,
        "cpeMatch": [
          {
            "vulnerable": true,
            "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
            "versionStartIncluding": "4.10",
            "versionEndExcluding": "5.10.258"
          },
          {
            "vulnerable": true,
            "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
            "versionStartIncluding": "4.10",
            "versionEndExcluding": "5.15.209"
          },
          {
            "vulnerable": true,
            "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
            "versionStartIncluding": "4.10",
            "versionEndExcluding": "6.1.175"
          },
          {
            "vulnerable": true,
            "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
            "versionStartIncluding": "4.10",
            "versionEndExcluding": "6.6.140"
          },
          {
            "vulnerable": true,
            "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
            "versionStartIncluding": "4.10",
            "versionEndExcluding": "6.12.88"
          },
          {
            "vulnerable": true,
            "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
            "versionStartIncluding": "4.10",
            "versionEndExcluding": "6.18.30"
          },
          {
            "vulnerable": true,
            "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
            "versionStartIncluding": "4.10",
            "versionEndExcluding": "7.0.7"
          },
          {
            "vulnerable": true,
            "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
            "versionStartIncluding": "4.10",
            "versionEndExcluding": "7.1"
          }
        ]
      }
    ]
  }
]
Contributing organizations · 3
Linux

Assigning organization

2026-06-14
redhat-SADP

Additional data publisher

2026-09-09
CISA-ADP

Additional data publisher

2026-11-06

Timeline

All times UTC

  1. Advisory published

    Publication date supplied by the source.

  2. Source updated

    Latest modification date supplied by the source.

  3. 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.