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CVE-2026-43125

Linux Linux, Red Hat Enterprise Linux 7 Extended Lifecycle Support, Red Hat Enterprise Linux 8

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.

CVSS
9.8
EPSS
0.43%
35.1% percentile
CISA KEV
Not listed
Published
2026.05.06
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability0.43%
Technical severityCVSS 9.8

Vulnerability overview

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.

Affected product and versions

Product
Linux Linux, Red Hat Enterprise Linux 7 Extended Lifecycle Support, Red Hat Enterprise Linux 8
Affected versions
>= 7210cb7a72a22303cdb225bd1aea28697a17bbae < 67288113c5e6cf9e659b4065c0ed6f16100e0c71, >= 7210cb7a72a22303cdb225bd1aea28697a17bbae < 082083c9fbd99422a0370fe2102144a231c9f5d6, >= 7210cb7a72a22303cdb225bd1aea28697a17bbae < 5f053a2e7209d326cbbc07738fa6d6893d307438, >= 7210cb7a72a22303cdb225bd1aea28697a17bbae < 080e5563f878c64e697b89e7439d730d0daad882, >= 3.4, >= 3.4 < 6.12.75, >= 6.13 < 6.18.16, >= 6.19 < 6.19.6
Fixed versions
6.12.75, 6.18.16, 6.19.6

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that Linux Linux, Red Hat Enterprise Linux 7 Extended Lifecycle Support, Red Hat Enterprise Linux 8 and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE
CWE-130, CWE-787