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CVE-2024-27397 is a time-of-check/time-of-use flaw leading to use-after-free in the Linux kernel's netfilter nf_tables subsystem. An nftables set element can expire while a control-plane transaction remains unfinished, making timeout handling inconsistent within the transaction. The issue was introduced in Linux 4.1. The fix records a transaction-start timestamp in the per-network-namespace nftables state and uses it for set-backend insert and deactivate operations and synchronous garbage collection. Packet-path lookup and update operations, lockless get and dump operations, and asynchronous garbage collection continue using the current time. Exploitation can cause a system crash or potentially allow local privilege escalation.
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No public exploit code observed for this vulnerability.
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25 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A Linux kernel netfilter/nf_tables vulnerability involving set elements expiring before a control-plane transaction finishes. The fix uses a transaction timestamp for relevant set operations and synchronous garbage collection. The advisory identifies affected Google COS kernel packages and assigns a CVSS v3 base score of 7.0 (High), with local access, low privileges, and high attack complexity required.
A Linux kernel netfilter/nf_tables flaw involving timeout handling for set elements during unfinished control-plane transactions. The fix introduces transaction timestamps to prevent elements from expiring while a transaction remains incomplete.
A vulnerability addressed by the CIQ LTS 8.6 kernel security-update advisory.
Linux kernel netfilter nf_tables set-element timeout handling vulnerability.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.