High [CVE-2026-31669] fix slab-use-after-free in __inet_lookup_established
This high-severity Red Hat Linux advisory covers CVE-2026-31669 affecting Red Hat Enterprise Linux 1, Red Hat Enterprise Linux 9, Red Hat Enterprise Linux 8.
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Summary
fix slab-use-after-free in __inet_lookup_established. Red Hat rates this moderate (CVSS 7.5).
Weakness: CWE-763. Affected package(s): kernel, kernel-rt.
Resolved in Red Hat advisory RHSA-2026:27288 — update the affected packages (`sudo dnf update`).
Affected products named by the advisory: Red Hat Enterprise Linux 1; Red Hat Enterprise Linux 9; Red Hat Enterprise Linux 8.
- kernel-0:6.12.0-55.84.1.el10_0
- kernel-0:5.14.0-427.134.1.el9_4
- kernel-0:5.14.0-687.17.1.el9_8
- kernel-rt-0:5.14.0-284.178.1.rt14.463.el9_2
- kernel-0:4.18.0-477.150.1.el8_8
- kernel-0:5.14.0-570.125.1.el9_6
- kernel-0:5.14.0-284.178.1.el9_2
- kernel-0:4.18.0-553.134.1.el8_10
- kernel-0:6.12.0-211.26.1.el10_2
- kernel-rt-0:4.18.0-553.134.1.rt7.475.el8_10
Official advisory · high-confidence parse· fetched 2 months ago·verify at source
- RHSA-2026:27288
Official advisory · high-confidence parse· fetched 2 months ago·verify at source
Mitigation checklist
- Update the affected package(s) to the fixed version shipped in RHSA-2026:27288 (`sudo dnf update` / `yum update`).
Official advisory · high-confidence parse· fetched 2 months ago·verify at source
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