nf_tables security

  1. CVE-2026-31665: Netfilter nftables Use-After-Free—RCU Fix for Linux Admins

    CVE-2026-31665 is a newly published Linux kernel vulnerability in netfilter, the packet-filtering framework that underpins nftables, conntrack, NAT, and many Linux firewall deployments. The bug is a use-after-free in the nftables connection-tracking timeout object destruction path, where the...
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    • linux kernel netfilter nf_tables security rcu use-after-free
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  2. CVE-2026-23272 Fixes nf_tables RCU Race in Linux Kernel Sets

    This latest Linux kernel CVE is a reminder that the most dangerous bugs are not always the loudest ones. CVE-2026-23272 affects netfilter’s nf_tables subsystem, where a subtle accounting and lifetime bug could let a set element be published and then removed without waiting for an RCU grace...
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    • linux kernel nf_tables security packet filtering rcu race condition
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    • Forum: Security Alerts