CVE-2026-43125critical9.8

dlm: validate length in dlm_search_rsb_tree

Impact

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

Source excerpt · Linux

What to do

RHSA-2026:35844: Red Hat Enterprise Linux Server (v. 7 ELS), Red Hat Enterprise Linux Server Optional (v. 7 ELS)

redhat-SADP guidance

RHSA-2026:41236: Red Hat Enterprise Linux for Real Time (v. 7 ELS)

redhat-SADP guidance

RHSA-2026:34095: 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-2026:34094: 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-2026:25217: 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-2026:25121: Red Hat Enterprise Linux BaseOS (v. 8), Red Hat Enterprise Linux CRB (v. 8)

redhat-SADP guidance

RHSA-2026:55762: Red Hat Enterprise Linux BaseOS (v. 8)

redhat-SADP guidance

RHSA-2026:59091: Red Hat Enterprise Linux BaseOS AUS (v.8.4), Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4)

redhat-SADP guidance

RHSA-2026:33899: Red Hat Enterprise Linux BaseOS AUS (v.8.6), Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.6)

redhat-SADP guidance

RHSA-2026:35863: Red Hat Enterprise Linux BaseOS E4S (v.8.8), Red Hat Enterprise Linux BaseOS TUS (v.8.8)

redhat-SADP guidance

RHSA-2026:55761: Red Hat Enterprise Linux BaseOS E4S (v.8.8)

redhat-SADP guidance

RHSA-2026:55837: Red Hat Enterprise Linux BaseOS E4S (v.9.2)

redhat-SADP guidance

RHSA-2026:56224: Red Hat Enterprise Linux BaseOS E4S (v.9.4)

redhat-SADP guidance

RHSA-2026:56225: Red Hat Enterprise Linux BaseOS EUS (v.9.6)

redhat-SADP guidance

RHSA-2026:55763: Red Hat Enterprise Linux BaseOS (v. 9)

redhat-SADP guidance

RHSA-2026:25120: Red Hat Enterprise Linux NFV (v. 8), Red Hat Enterprise Linux RT (v. 8)

redhat-SADP guidance

RHSA-2026:33900: 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

Affected packages

This source has no supported package-version data for matching. You can read the advisory here, but this record alone cannot power a dependency check.

Affected products

Vendor version evidence. Product records are separate from automatic dependency matching.

Linux · Linux

Linux

7 ranges

Linux version evidence

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affected

7210cb7a72a22303cdb225bd1aea28697a17bbae → before 0270664871616eb3a5c864b9aa17be76fd35b920

git versions

7210cb7a72a22303cdb225bd1aea28697a17bbae → before c98d071a1ca903b705316225e47006aaa20e989c

git versions

7210cb7a72a22303cdb225bd1aea28697a17bbae → before 2deafd015ea9a0e75ee5764e20eb1e16bd73efd8

git versions

7210cb7a72a22303cdb225bd1aea28697a17bbae → before 67288113c5e6cf9e659b4065c0ed6f16100e0c71

git versions

7210cb7a72a22303cdb225bd1aea28697a17bbae → before 082083c9fbd99422a0370fe2102144a231c9f5d6

git versions

7210cb7a72a22303cdb225bd1aea28697a17bbae → before 5f053a2e7209d326cbbc07738fa6d6893d307438

git versions

7210cb7a72a22303cdb225bd1aea28697a17bbae → before 080e5563f878c64e697b89e7439d730d0daad882

git versions

Other versions: unaffected

Linux · Linux

Linux

9 ranges

Linux version evidence

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affected

3.4

unaffected

0 → before 3.4

semver versions

5.15.224 → through 5.15.*

semver versions

6.1.191 → through 6.1.*

semver versions

6.6.160 → through 6.6.*

semver versions

6.12.75 → through 6.12.*

semver versions

6.18.16 → through 6.18.*

semver versions

6.19.6 → through 6.19.*

semver versions

7.0 → through *

original_commit_for_fix versions

Other versions: affected

Red Hat · redhat-SADP

Red Hat Enterprise Linux 7 Extended Lifecycle Support

1 range

redhat-SADP version evidence

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unaffected

0:3.10.0-1160.155.1.rt56.1307.el7 → before *

rpm versions

Other versions: affected

Product identifiers (CPE)

cpe:/a:redhat:rhel_extras_rt_els:7

Red Hat · redhat-SADP

Red Hat Enterprise Linux 7 Extended Lifecycle Support

1 range

redhat-SADP version evidence

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unaffected

0:3.10.0-1160.154.1.el7 → before *

rpm versions

Other versions: affected

Product identifiers (CPE)

cpe:/o:redhat:rhel_els:7

Red Hat · redhat-SADP

Red Hat Enterprise Linux 8

1 range

redhat-SADP version evidence

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unaffected

0:4.18.0-553.132.1.rt7.473.el8_10 → before *

rpm versions

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

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unaffected

0:4.18.0-553.132.1.el8_10 → before *

rpm versions

Other versions: affected

Product identifiers (CPE)

cpe:/o:redhat:enterprise_linux:8

Red Hat · redhat-SADP

Red Hat Enterprise Linux 8

0 ranges

redhat-SADP version evidence

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Other versions: unaffected

Product identifiers (CPE)

cpe:/o:redhat:enterprise_linux:8

Red Hat · redhat-SADP

Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support

1 range

redhat-SADP version evidence

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unaffected

0:4.18.0-372.198.1.el8_6 → before *

rpm versions

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

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unaffected

0:4.18.0-372.198.1.el8_6 → before *

rpm versions

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

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unaffected

0:4.18.0-477.150.1.el8_8 → before *

rpm versions

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

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unaffected

0:4.18.0-477.150.1.el8_8 → before *

rpm versions

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

redhat-SADP version evidence

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Other versions: unaffected

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

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unaffected

0:5.14.0-687.15.1.el9_8 → before *

rpm versions

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 ranges

redhat-SADP version evidence

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Other versions: unaffected

Product identifiers (CPE)

cpe:/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

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unaffected

0:5.14.0-284.178.1.el9_2 → before *

rpm versions

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

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unaffected

0:5.14.0-284.178.1.rt14.463.el9_2 → before *

rpm versions

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

redhat-SADP version evidence

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Other versions: unaffected

Product identifiers (CPE)

cpe:/o:redhat:rhel_e4s:9.2

Red Hat · redhat-SADP

Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions

1 range

redhat-SADP version evidence

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unaffected

0:5.14.0-427.136.1.el9_4 → before *

rpm versions

Other versions: affected

Product identifiers (CPE)

cpe:/a:redhat:rhel_e4s:9.4

Red Hat · redhat-SADP

Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions

0 ranges

redhat-SADP version evidence

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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

redhat-SADP version evidence

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unaffected

0:5.14.0-570.125.1.el9_6 → before *

rpm versions

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

redhat-SADP version evidence

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Other versions: unaffected

Product identifiers (CPE)

cpe:/o:redhat:rhel_eus:9.6

Red Hat · redhat-SADP

Red Hat Enterprise Linux 10

0 ranges

redhat-SADP version evidence

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Other versions: unaffected

Product identifiers (CPE)

cpe:/o:redhat:enterprise_linux:10

Red Hat · redhat-SADP

Red Hat Enterprise Linux 6

0 ranges

redhat-SADP version evidence

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Other versions: unknown

Product identifiers (CPE)

cpe:/o:redhat:enterprise_linux:6

Red Hat · redhat-SADP

Red Hat Enterprise Linux 9

0 ranges

redhat-SADP version evidence

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Other versions: affected

Product identifiers (CPE)

cpe:/o:redhat:enterprise_linux:9

Original source description

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

dlm: validate length in dlm_search_rsb_tree

The len parameter in dlm_dump_rsb_name() is not validated and comes from network messages. When it exceeds DLM_RESNAME_MAXLEN, it can cause out-of-bounds write in dlm_search_rsb_tree().

Add length validation to prevent potential buffer overflow.

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-2026-43125

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-130 ↗

Improper Handling of Length Parameter Inconsistency

redhat-SADP

CWE-787 ↗

CWE-787 Out-of-bounds Write

CISA-ADP

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): 3.4

After:

Through (inclusive):

Before: 5.15.224

Vulnerable product

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

From (inclusive): 3.4

After:

Through (inclusive):

Before: 6.1.191

Vulnerable product

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

From (inclusive): 3.4

After:

Through (inclusive):

Before: 6.6.160

Vulnerable product

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

From (inclusive): 3.4

After:

Through (inclusive):

Before: 6.12.75

Vulnerable product

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

From (inclusive): 3.4

After:

Through (inclusive):

Before: 6.18.16

Vulnerable product

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

From (inclusive): 3.4

After:

Through (inclusive):

Before: 6.19.6

Vulnerable product

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

From (inclusive): 3.4

After:

Through (inclusive):

Before: 7.0

Original applicability statements

[
  {
    "nodes": [
      {
        "operator": "OR",
        "negate": false,
        "cpeMatch": [
          {
            "vulnerable": true,
            "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
            "versionStartIncluding": "3.4",
            "versionEndExcluding": "5.15.224"
          },
          {
            "vulnerable": true,
            "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
            "versionStartIncluding": "3.4",
            "versionEndExcluding": "6.1.191"
          },
          {
            "vulnerable": true,
            "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
            "versionStartIncluding": "3.4",
            "versionEndExcluding": "6.6.160"
          },
          {
            "vulnerable": true,
            "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
            "versionStartIncluding": "3.4",
            "versionEndExcluding": "6.12.75"
          },
          {
            "vulnerable": true,
            "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
            "versionStartIncluding": "3.4",
            "versionEndExcluding": "6.18.16"
          },
          {
            "vulnerable": true,
            "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
            "versionStartIncluding": "3.4",
            "versionEndExcluding": "6.19.6"
          },
          {
            "vulnerable": true,
            "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
            "versionStartIncluding": "3.4",
            "versionEndExcluding": "7.0"
          }
        ]
      }
    ]
  }
]

Contributing organizations · 3

Linux

Assigning organization

2026-10-30

redhat-SADP

Additional data publisher

2026-08-25

CISA-ADP

Additional data publisher

2026-10-19

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.

References

28 sources

access.redhat.com/errata/RHSA-2026:35844

vendor-advisoryredhat-SADP

access.redhat.com/errata/RHSA-2026:41236

vendor-advisoryredhat-SADP

access.redhat.com/errata/RHSA-2026:34095

vendor-advisoryredhat-SADP

access.redhat.com/errata/RHSA-2026:36767

vendor-advisoryredhat-SADP

access.redhat.com/errata/RHSA-2026:34094

vendor-advisoryredhat-SADP

access.redhat.com/errata/RHSA-2026:25217

vendor-advisoryredhat-SADP

View 22 more references

access.redhat.com/errata/RHSA-2026:25121

vendor-advisoryredhat-SADP

access.redhat.com/errata/RHSA-2026:55762

vendor-advisoryredhat-SADP

access.redhat.com/errata/RHSA-2026:59091

vendor-advisoryredhat-SADP

access.redhat.com/errata/RHSA-2026:33899

vendor-advisoryredhat-SADP

access.redhat.com/errata/RHSA-2026:35863

vendor-advisoryredhat-SADP

access.redhat.com/errata/RHSA-2026:55761

vendor-advisoryredhat-SADP

access.redhat.com/errata/RHSA-2026:55837

vendor-advisoryredhat-SADP

access.redhat.com/errata/RHSA-2026:56224

vendor-advisoryredhat-SADP

access.redhat.com/errata/RHSA-2026:56225

vendor-advisoryredhat-SADP

access.redhat.com/errata/RHSA-2026:55763

vendor-advisoryredhat-SADP

access.redhat.com/errata/RHSA-2026:25120

vendor-advisoryredhat-SADP

access.redhat.com/errata/RHSA-2026:33900

vendor-advisoryredhat-SADP

git.kernel.org/stable/c/0270664871616eb3a5c864b9aa17be76fd35b920

Source referenceLinux

git.kernel.org/stable/c/c98d071a1ca903b705316225e47006aaa20e989c

Source referenceLinux

git.kernel.org/stable/c/2deafd015ea9a0e75ee5764e20eb1e16bd73efd8

Source referenceLinux

git.kernel.org/stable/c/67288113c5e6cf9e659b4065c0ed6f16100e0c71

Source referenceLinux

git.kernel.org/stable/c/082083c9fbd99422a0370fe2102144a231c9f5d6

Source referenceLinux

git.kernel.org/stable/c/5f053a2e7209d326cbbc07738fa6d6893d307438

Source referenceLinux

git.kernel.org/stable/c/080e5563f878c64e697b89e7439d730d0daad882

Source referenceLinux

access.redhat.com/security/cve/CVE-2026-43125

vdb-entryredhat-SADP

bugzilla.redhat.com/show_bug.cgi

issue-trackingredhat-SADP

security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-43125.json

Security advisoryredhat-SADP

Priority and evidence

Not in CISA KEVNo package fix recorded

KEV coverage does not rule out exploitation.

KEV checked 31/10/2026, 10:20:31 UTC

Linux · CVSS:3.1 · 9.8

Assessment vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

redhat-SADP · CVSS:3.1 · 7

Assessment vector

CVSS:3.1/AV:L/AC:H/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.

Reading the signals

Severity · CVSS: Technical impact and attack conditions. The headline is the highest imported catalog score; sources may disagree.
Observed exploitation · KEV: An absent or unavailable KEV listing does not establish that exploitation has not occurred.
Predicted exploitation · EPSS: No EPSS estimate available in this record.

CISA-ADP · SSVC

CISA Coordinator · 2026-10-16

Exploitation: none
Automatable: yes
Technical Impact: total

SSVC describes the publisher’s decision context. Your organization’s exposure and priorities may differ.

Record details

Published: 06/05/2026, 11:27:10 UTC
Modified: 30/10/2026, 12:25:01 UTC
Last imported by cve.new: 30/10/2026, 12:50:15 UTC
Aliases: None recorded

Source evidence

Request a correction or dispute

Start with the assigning organization for this record. Include the CVE ID, the disputed information, and supporting evidence. A dispute does not itself reject a record.

Find the responsible CNA →Official dispute and escalation process ↗

CVE CVE-2026-43125

Enrichment coverage

NVDNot fully checked

GHSANot fully checked

EUVDNot fully checked

EPSSNot fully checked

Sponsored by MoxsoBuild security habits with adaptive training and phishing simulations.View as JSON