{"api_version":"1","generated_at":"2026-08-23T21:53:22+00:00","cve":"CVE-2026-74624","urls":{"html":"https://cve.report/CVE-2026-74624","api":"https://cve.report/api/cve/CVE-2026-74624.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-74624","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-74624"},"summary":{"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":"PUBLISHED","assigner":"Linux","published_at":"2026-08-22 16:16:35","updated_at":"2026-08-23 13:16:47"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/2d19b95c9723001f214f7a47d67b09f46238f200","name":"https://git.kernel.org/stable/c/2d19b95c9723001f214f7a47d67b09f46238f200","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/9480fcf70a5aa9d320088a01c95df0e5e6391f4a","name":"https://git.kernel.org/stable/c/9480fcf70a5aa9d320088a01c95df0e5e6391f4a","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/0424186d570aa4d1ad17f516afb86bd9eaa4f42e","name":"https://git.kernel.org/stable/c/0424186d570aa4d1ad17f516afb86bd9eaa4f42e","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/ca97360eba4b3dc67f1804625542f4ccc774242a","name":"https://git.kernel.org/stable/c/ca97360eba4b3dc67f1804625542f4ccc774242a","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/c0224327b7cbed9d3198e8dbec847281053dcd06","name":"https://git.kernel.org/stable/c/c0224327b7cbed9d3198e8dbec847281053dcd06","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/63853eb20bba4e00b7cd0b8cfc19337bbaaf5037","name":"https://git.kernel.org/stable/c/63853eb20bba4e00b7cd0b8cfc19337bbaaf5037","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-74624","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-74624","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected d9a6f0d0df1899ff9086a57abc600e414f4b8cdd ca97360eba4b3dc67f1804625542f4ccc774242a git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected d9a6f0d0df1899ff9086a57abc600e414f4b8cdd 63853eb20bba4e00b7cd0b8cfc19337bbaaf5037 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected d9a6f0d0df1899ff9086a57abc600e414f4b8cdd 9480fcf70a5aa9d320088a01c95df0e5e6391f4a git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected d9a6f0d0df1899ff9086a57abc600e414f4b8cdd 0424186d570aa4d1ad17f516afb86bd9eaa4f42e git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected d9a6f0d0df1899ff9086a57abc600e414f4b8cdd c0224327b7cbed9d3198e8dbec847281053dcd06 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected d9a6f0d0df1899ff9086a57abc600e414f4b8cdd 2d19b95c9723001f214f7a47d67b09f46238f200 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.1","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.1 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.1.184 6.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.152 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.104 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.45 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.1.9 7.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["net/netfilter/nf_conntrack_proto.c","net/netfilter/nf_conntrack_proto_sctp.c","net/netfilter/nf_conntrack_proto_tcp.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"ca97360eba4b3dc67f1804625542f4ccc774242a","status":"affected","version":"d9a6f0d0df1899ff9086a57abc600e414f4b8cdd","versionType":"git"},{"lessThan":"63853eb20bba4e00b7cd0b8cfc19337bbaaf5037","status":"affected","version":"d9a6f0d0df1899ff9086a57abc600e414f4b8cdd","versionType":"git"},{"lessThan":"9480fcf70a5aa9d320088a01c95df0e5e6391f4a","status":"affected","version":"d9a6f0d0df1899ff9086a57abc600e414f4b8cdd","versionType":"git"},{"lessThan":"0424186d570aa4d1ad17f516afb86bd9eaa4f42e","status":"affected","version":"d9a6f0d0df1899ff9086a57abc600e414f4b8cdd","versionType":"git"},{"lessThan":"c0224327b7cbed9d3198e8dbec847281053dcd06","status":"affected","version":"d9a6f0d0df1899ff9086a57abc600e414f4b8cdd","versionType":"git"},{"lessThan":"2d19b95c9723001f214f7a47d67b09f46238f200","status":"affected","version":"d9a6f0d0df1899ff9086a57abc600e414f4b8cdd","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["net/netfilter/nf_conntrack_proto.c","net/netfilter/nf_conntrack_proto_sctp.c","net/netfilter/nf_conntrack_proto_tcp.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"6.1"},{"lessThan":"6.1","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.184","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.152","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.104","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.45","versionType":"semver"},{"lessThanOrEqual":"7.1.*","status":"unaffected","version":"7.1.9","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.2","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.184","versionStartIncluding":"6.1","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.152","versionStartIncluding":"6.1","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.104","versionStartIncluding":"6.1","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.45","versionStartIncluding":"6.1","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.1.9","versionStartIncluding":"6.1","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2","versionStartIncluding":"6.1","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"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."}],"providerMetadata":{"dateUpdated":"2026-08-23T12:47:49.682Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/ca97360eba4b3dc67f1804625542f4ccc774242a"},{"url":"https://git.kernel.org/stable/c/63853eb20bba4e00b7cd0b8cfc19337bbaaf5037"},{"url":"https://git.kernel.org/stable/c/9480fcf70a5aa9d320088a01c95df0e5e6391f4a"},{"url":"https://git.kernel.org/stable/c/0424186d570aa4d1ad17f516afb86bd9eaa4f42e"},{"url":"https://git.kernel.org/stable/c/c0224327b7cbed9d3198e8dbec847281053dcd06"},{"url":"https://git.kernel.org/stable/c/2d19b95c9723001f214f7a47d67b09f46238f200"}],"title":"netfilter: nf_conntrack: defer invalid log until after unlock","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-74624","datePublished":"2026-08-22T15:32:07.193Z","dateReserved":"2026-08-15T05:44:03.921Z","dateUpdated":"2026-08-23T12:47:49.682Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-08-22 16:16:35","lastModifiedDate":"2026-08-23 13:16:47","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"74624","Ordinal":"1","Title":"netfilter: nf_conntrack: defer invalid log until after unlock","CVE":"CVE-2026-74624","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"74624","Ordinal":"1","NoteData":"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.","Type":"Description","Title":"netfilter: nf_conntrack: defer invalid log until after unlock"}]}}}