{"id":"CVE-2026-74624","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: nf_conntrack: defer invalid log until after unlock\n\nTCP and SCTP conntrack paths can emit invalid-packet logs while ct->lock\nis still held.\n\nWhen invalid log…","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: nf_conntrack: defer invalid log until after unlock\n\nTCP and SCTP conntrack paths can emit invalid-packet logs while ct->lock\nis still held.\n\nWhen invalid log…","severity":"high","cvss":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","cwe":["CWE-833"],"vendor":"Linux","product":"Linux","affected":["Linux >= d9a6f0d0df1899ff9086a57abc600e414f4b8cdd < ca97360eba4b3dc67f1804625542f4ccc774242a","Linux >= d9a6f0d0df1899ff9086a57abc600e414f4b8cdd < 63853eb20bba4e00b7cd0b8cfc19337bbaaf5037","Linux >= d9a6f0d0df1899ff9086a57abc600e414f4b8cdd < 9480fcf70a5aa9d320088a01c95df0e5e6391f4a","Linux >= d9a6f0d0df1899ff9086a57abc600e414f4b8cdd < 0424186d570aa4d1ad17f516afb86bd9eaa4f42e","Linux >= d9a6f0d0df1899ff9086a57abc600e414f4b8cdd < c0224327b7cbed9d3198e8dbec847281053dcd06","Linux >= d9a6f0d0df1899ff9086a57abc600e414f4b8cdd < 2d19b95c9723001f214f7a47d67b09f46238f200","Linux 6.1"],"published":"2026-08-22","updated":"2026-10-16","sourceUpdated":"2026-10-16T20:17:47.480","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-74624","references":[{"url":"https://git.kernel.org/stable/c/0424186d570aa4d1ad17f516afb86bd9eaa4f42e","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/2d19b95c9723001f214f7a47d67b09f46238f200","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/63853eb20bba4e00b7cd0b8cfc19337bbaaf5037","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/9480fcf70a5aa9d320088a01c95df0e5e6391f4a","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/c0224327b7cbed9d3198e8dbec847281053dcd06","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/ca97360eba4b3dc67f1804625542f4ccc774242a","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-74624.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-74624"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2521365"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-74624"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-74624"},{"url":"https://kernelcve.org/list/?q=CVE-2026-74624"},{"url":"https://lore.kernel.org/linux-cve-announce/2026082220-CVE-2026-74624-2bd0@gregkh/T"}],"tags":["nvd","cve.org","csaf","vex","red-hat"],"epss":0.00479,"epssPercentile":0.41127,"ssvc":{"exploitation":"none","automatable":"yes","technicalImpact":"partial","timestamp":"2026-10-16T19:02:43.340591Z"},"scores":{"nvd":7.5,"vendor":5.9},"ingestedAt":"2026-10-14T13:30:58.519Z","slug":"CVE-2026-74624","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: nf_conntrack: defer invalid log until after unlock\n\nTCP and SCTP conntrack paths can emit invalid-packet logs while ct->lock\nis still held.\n\nWhen invalid logging is routed to nfnetlink_log and conntrack export is\nenabled, the log path can re-enter conntrack netlink glue and dump the\nsame conntrack again. Protocol attribute dumping may take ct->lock, so\nlogging while holding that lock can deadlock.\n\nDefer the TCP invalid logs by storing only the minimal log context while\nct->lock is held and emitting the log after unlocking. Also make the TCP\ntimeout-lowering invalid path return whether a log is needed, then emit\nthat log after unlocking.\n\nDo the same for the SCTP invalid state-transition log that can be reached\nwhile ct->lock is held.\n\nAdd a lockdep assertion to nf_ct_l4proto_log_invalid() so future callers\nthat log invalid conntracks while holding ct->lock are caught outside TCP\nand SCTP as well.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 9 · no fix planned: Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 9 · updated 2026-10-26 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-74624.json)","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":41.3,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}