CVE-2026-23111: Linux nf_tables Flaw Enables Root Exploits
ID: 0789c6b7-21ea-573e-a7dc-0d317b69026e
STIX ID: report--0789c6b7-21ea-573e-a7dc-0d317b69026e
Feed Name: Security Affairs
Threat Score
CVE-2026-23111 is a Linux nf_tables use-after-free that allows a local unprivileged user (with user namespaces enabled) to achieve root via a sequence that drains and frees chain objects; the flaw was fixed by removing a single negation in the abort path, but public exploits and technical walkthroughs were published after the patch, affecting many common distributions—users are advised to update kernels and restrict unprivileged user namespaces until patched.
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