High7.5Red Hat & Ubuntu Linux
reserve mac_len headroom when recompressed SRH grows
CVE-2026-43501 Published May 21, 2026
CVE-2026-43501
Affected products & platforms
Red Hat & Ubuntu LinuxUnclassified
Summary
reserve mac_len headroom when recompressed SRH grows. Red Hat rates this important (CVSS 7.5). Weakness: CWE-131. Affected package(s): kernel, kernel-rt. Resolved in Red Hat advisory RHSA-2026:34094 — update the affected packages (`sudo dnf update`).
Affected versions
- kernel-0:6.12.0-211.22.1.el10_2
- kernel-0:5.14.0-427.134.1.el9_4
- kernel-rt-0:5.14.0-284.178.1.rt14.463.el9_2
- kernel-0:6.12.0-55.82.1.el10_0
- 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 1 day ago·verify at source
Fixed versions
- RHSA-2026:34094
Official advisory · high-confidence parse· fetched 1 day ago·verify at source
Mitigation checklist
Recommended fix / mitigation
- Update the affected package(s) to the fixed version shipped in RHSA-2026:34094 (`sudo dnf update` / `yum update`).
Official advisory · high-confidence parse· fetched 1 day ago·verify at source
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