{"id":"CVE-2026-74624","revision":"93c625d199254ea8abda6dbefd08215d","records":[{"revision":"93c625d199254ea8abda6dbefd08215d","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-74624","aliases":[],"title":"netfilter: nf_conntrack: defer invalid log until after unlock","description":"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 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.","state":0,"publishedAt":"2026-08-22T15:32:07.193+00:00","modifiedAt":"2026-10-16T19:06:02.842+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"net/netfilter/nf_conntrack_proto.c\",\n                        \"net/netfilter/nf_conntrack_proto_sctp.c\",\n                        \"net/netfilter/nf_conntrack_proto_tcp.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"d9a6f0d0df1899ff9086a57abc600e414f4b8cdd\",\n                            \"lessThan\": \"ca97360eba4b3dc67f1804625542f4ccc774242a\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"d9a6f0d0df1899ff9086a57abc600e414f4b8cdd\",\n                            \"lessThan\": \"63853eb20bba4e00b7cd0b8cfc19337bbaaf5037\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"d9a6f0d0df1899ff9086a57abc600e414f4b8cdd\",\n                            \"lessThan\": \"9480fcf70a5aa9d320088a01c95df0e5e6391f4a\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"d9a6f0d0df1899ff9086a57abc600e414f4b8cdd\",\n                            \"lessThan\": \"0424186d570aa4d1ad17f516afb86bd9eaa4f42e\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"d9a6f0d0df1899ff9086a57abc600e414f4b8cdd\",\n                            \"lessThan\": \"c0224327b7cbed9d3198e8dbec847281053dcd06\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"d9a6f0d0df1899ff9086a57abc600e414f4b8cdd\",\n                            \"lessThan\": \"2d19b95c9723001f214f7a47d67b09f46238f200\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"affected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"net/netfilter/nf_conntrack_proto.c\",\n                        \"net/netfilter/nf_conntrack_proto_sctp.c\",\n                        \"net/netfilter/nf_conntrack_proto_tcp.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"6.1\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"6.1\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.184\",\n                            \"lessThanOrEqual\": \"6.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.152\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.104\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.45\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.1.9\",\n                            \"lessThanOrEqual\": \"7.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/ca97360eba4b3dc67f1804625542f4ccc774242a","https://git.kernel.org/stable/c/63853eb20bba4e00b7cd0b8cfc19337bbaaf5037","https://git.kernel.org/stable/c/9480fcf70a5aa9d320088a01c95df0e5e6391f4a","https://git.kernel.org/stable/c/0424186d570aa4d1ad17f516afb86bd9eaa4f42e","https://git.kernel.org/stable/c/c0224327b7cbed9d3198e8dbec847281053dcd06","https://git.kernel.org/stable/c/2d19b95c9723001f214f7a47d67b09f46238f200"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-74624","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-74624","identifiers":["CVE-2026-74624"]},"retained":false,"historicalAffected":[]}],"coverage":[]}