High7.8Red Hat & Ubuntu Linux
validate the whole DACL before rewriting it in cifsacl
CVE-2026-31709 Published May 1, 2026
CVE-2026-31709
Affected products & platforms
Red Hat & Ubuntu LinuxUnclassified
Summary
validate the whole DACL before rewriting it in cifsacl. Red Hat rates this important (CVSS 7.8). Weakness: CWE-1288. Affected package(s): kernel, kernel-rt. Resolved in Red Hat advisory RHSA-2026:21745 — update the affected packages (`sudo dnf update`).
Affected versions
- kernel-0:4.18.0-553.126.1.el8_10
- kernel-0:5.14.0-427.129.1.el9_4
- kernel-rt-0:5.14.0-284.174.1.rt14.459.el9_2
- kernel-rt-0:4.18.0-553.126.1.rt7.467.el8_10
- kernel-0:6.12.0-211.20.1.el10_2
- kernel-0:5.14.0-284.174.1.el9_2
- kernel-0:5.14.0-687.12.1.el9_8
- kernel-0:5.14.0-570.119.1.el9_6
- kernel-0:6.12.0-55.77.1.el10_0
Official advisory · high-confidence parse· fetched 1 day ago·verify at source
Fixed versions
- RHSA-2026:21745
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-2026:21745 (`sudo dnf update` / `yum update`).
Official advisory · high-confidence parse· fetched 1 day ago·verify at source
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