CVE-2026-74624 (GCVE-0-2026-74624)
Vulnerability from cvelistv5
Published
2026-08-22 15:32
Modified
2026-10-16 19:06
Severity ?
7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_conntrack: defer invalid log until after unlock TCP and SCTP conntrack paths can emit invalid-packet logs while ct->lock is still held. When invalid logging is routed to nfnetlink_log and conntrack export is enabled, the log path can re-enter conntrack netlink glue and dump the same conntrack again. Protocol attribute dumping may take ct->lock, so logging while holding that lock can deadlock. Defer the TCP invalid logs by storing only the minimal log context while ct->lock is held and emitting the log after unlocking. Also make the TCP timeout-lowering invalid path return whether a log is needed, then emit that log after unlocking. Do the same for the SCTP invalid state-transition log that can be reached while ct->lock is held. Add a lockdep assertion to nf_ct_l4proto_log_invalid() so future callers that log invalid conntracks while holding ct->lock are caught outside TCP and SCTP as well.
References
Impacted products
Vendor Product Version
Linux Linux Version: d9a6f0d0df1899ff9086a57abc600e414f4b8cdd
Version: d9a6f0d0df1899ff9086a57abc600e414f4b8cdd
Version: d9a6f0d0df1899ff9086a57abc600e414f4b8cdd
Version: d9a6f0d0df1899ff9086a57abc600e414f4b8cdd
Version: d9a6f0d0df1899ff9086a57abc600e414f4b8cdd
Version: d9a6f0d0df1899ff9086a57abc600e414f4b8cdd
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