High7.0Red Hat Linux

High [CVE-2026-43125] validate length in dlm_search_rsb_tree

This high-severity Red Hat Linux advisory covers CVE-2026-43125 affecting Red Hat Enterprise Linux 7 Extended Lifecycle Support, Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support, Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On.

CVE-2026-43125 Published May 6, 2026

CVE-2026-43125

Affected products & platforms

Red Hat LinuxUnclassified

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Summary

validate length in dlm_search_rsb_tree. Red Hat rates this important (CVSS 7).

Weakness: CWE-130. Affected package(s): kernel, kernel-rt.

Resolved in Red Hat advisory RHSA-2026:25120 — update the affected packages (`sudo dnf update`).

Affected products named by the advisory: Red Hat Enterprise Linux 7 Extended Lifecycle Support; Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support; Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On; Red Hat Enterprise Linux 8.8 Telecommunications Update Service; and 4 more.

Affected versions

kernel-0:3.10.0-1160.154.1.el7
kernel-rt-0:4.18.0-553.132.1.rt7.473.el8_10
kernel-0:4.18.0-372.198.1.el8_6
kernel-rt-0:5.14.0-284.178.1.rt14.463.el9_2
kernel-0:4.18.0-553.132.1.el8_10
kernel-0:4.18.0-477.150.1.el8_8
kernel-0:5.14.0-570.125.1.el9_6
kernel-0:5.14.0-687.15.1.el9_8
kernel-0:5.14.0-284.178.1.el9_2

Official advisory · high-confidence parse· fetched 2 months ago·verify at source

Fixed versions

RHSA-2026:25120

Official advisory · high-confidence parse· fetched 2 months ago·verify at source

Mitigation checklist

Recommended fix / mitigation

Update the affected package(s) to the fixed version shipped in RHSA-2026:25120 (`sudo dnf update` / `yum update`).

Official advisory · high-confidence parse· fetched 2 months ago·verify at source

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