High [CVE-2026-23111] Privilege escalation or denial of service in nf_tables via inverted element activity check
This high-severity Red Hat Linux advisory covers CVE-2026-23111 affecting Red Hat Enterprise Linux AppStream EUS (v. 10.0), Red Hat Enterprise Linux AppStream (v. 10), Red Hat Enterprise Linux AppStream EUS (v.9.4).
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Summary
Privilege escalation or denial of service in nf_tables via inverted element activity check. Red Hat rates this important (CVSS 7.8).
Weakness: CWE-672. Affected package(s): kernel.
Resolved in Red Hat advisory RHSA-2026:9112 — update the affected packages (`sudo dnf update`).
Affected products named by the advisory: Red Hat Enterprise Linux AppStream EUS (v. 10.0); Red Hat Enterprise Linux AppStream (v. 10); Red Hat Enterprise Linux AppStream EUS (v.9.4); Red Hat Enterprise Linux AppStream EUS (v.9.6); and 24 more.
- kernel-0:6.12.0-55.70.1.el10_0
- kernel-0:5.14.0-570.108.1.el9_6
- kernel-0:6.12.0-211.7.1.el10_2
- kernel-0:5.14.0-427.121.1.el9_4
- kernel-0:5.14.0-611.47.1.el9_7
Official advisory · high-confidence parse· fetched 2 months ago·verify at source
- RHSA-2026:9112
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-2026:9112 (`sudo dnf update` / `yum update`).
Official advisory · high-confidence parse· fetched 2 months ago·verify at source
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