High7.5Vendor: MediumRed Hat & Ubuntu Linux
Privilege escalation or denial of service via use-after-free in nf_tables_addchain()
CVE-2026-23231 Published Mar 4, 2026
CVE-2026-23231
Affected products & platforms
Red Hat & Ubuntu LinuxUnclassified
Summary
Privilege escalation or denial of service via use-after-free in nf_tables_addchain(). Red Hat rates this moderate (CVSS 7.5). Weakness: CWE-416. Affected package(s): kernel-rt, kernel. Resolved in Red Hat advisory RHSA-2026:10756 — update the affected packages (`sudo dnf update`).
Affected versions
- kernel-rt-0:4.18.0-553.117.1.rt7.458.el8_10
- kernel-0:4.18.0-193.195.1.el8_2
- kernel-0:3.10.0-1160.148.1.el7
- kernel-0:4.18.0-477.136.1.el8_8
- kernel-0:4.18.0-305.189.1.el8_4
- kernel-0:5.14.0-427.121.1.el9_4
- kernel-0:4.18.0-372.188.1.el8_6
- kernel-0:5.14.0-611.47.1.el9_7
- kernel-0:5.14.0-70.175.1.el9_0
- kernel-0:5.14.0-284.166.1.el9_2
- kernel-rt-0:5.14.0-284.166.1.rt14.451.el9_2
- kernel-0:6.12.0-124.47.1.el10_1
Official advisory · high-confidence parse· fetched 1 day ago·verify at source
Fixed versions
- RHSA-2026:10756
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-2026:10756 (`sudo dnf update` / `yum update`).
Official advisory · high-confidence parse· fetched 1 day ago·verify at source
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