{"api_version":"1","generated_at":"2026-08-22T21:53:02+00:00","cve":"CVE-2026-74704","urls":{"html":"https://cve.report/CVE-2026-74704","api":"https://cve.report/api/cve/CVE-2026-74704.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-74704","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-74704"},"summary":{"title":"net/sched: sch_cake: drop WARN_ON(1) for malformed packets in ACK filter","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet/sched: sch_cake: drop WARN_ON(1) for malformed packets in ACK filter\n\nThe sch_cake ACK filter parses packets to find the TCP header and filter\nduplicated ACKs if the flow is backlogged. The parsing code contains a\nWARN_ON(1) which can be triggered by a malformed IP header in certain\ncases. Depending on the system configuration, this leads either to\neither spamming dmesg with warnings, or a panic if panic_on_warn is set.\n\nThe code already correctly skips the offending packet in the branch that\ntriggers the warning, so the WARN_ON itself doesn't really serve any\npurpose. So just drop it altogether to avoid the inconvenient side\neffects.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-08-22 16:16:45","updated_at":"2026-08-22 16:16:45"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/c1693b7844a6c06d31a565e5a494948034dfd235","name":"https://git.kernel.org/stable/c/c1693b7844a6c06d31a565e5a494948034dfd235","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/0c4882bff34558d8d53fb04c3e96da5c327c7dc8","name":"https://git.kernel.org/stable/c/0c4882bff34558d8d53fb04c3e96da5c327c7dc8","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/cd2f1d9fe8a507c2dc86ad326fe221f121c47734","name":"https://git.kernel.org/stable/c/cd2f1d9fe8a507c2dc86ad326fe221f121c47734","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/ae1b2f8e21a41e7c7e75511bea0c4ccc59ec1bd3","name":"https://git.kernel.org/stable/c/ae1b2f8e21a41e7c7e75511bea0c4ccc59ec1bd3","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/a1ae353d8355407c1bea971d1c1af5e7f242bb7d","name":"https://git.kernel.org/stable/c/a1ae353d8355407c1bea971d1c1af5e7f242bb7d","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/a4b52612004a5639c4bfc30ba93ba414b8326e2a","name":"https://git.kernel.org/stable/c/a4b52612004a5639c4bfc30ba93ba414b8326e2a","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/2a33516f9ef59ad11844d4fc152f889449b5daf3","name":"https://git.kernel.org/stable/c/2a33516f9ef59ad11844d4fc152f889449b5daf3","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/2504a76e5c0694e14e15562730e1339f2d9f9458","name":"https://git.kernel.org/stable/c/2504a76e5c0694e14e15562730e1339f2d9f9458","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-74704","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-74704","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 8b7138814f29933898ecd31dfc83e35a30ee69f5 c1693b7844a6c06d31a565e5a494948034dfd235 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 8b7138814f29933898ecd31dfc83e35a30ee69f5 a4b52612004a5639c4bfc30ba93ba414b8326e2a git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 8b7138814f29933898ecd31dfc83e35a30ee69f5 ae1b2f8e21a41e7c7e75511bea0c4ccc59ec1bd3 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 8b7138814f29933898ecd31dfc83e35a30ee69f5 0c4882bff34558d8d53fb04c3e96da5c327c7dc8 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 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semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.15.216 5.15.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.1.183 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/sched/sch_cake.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"c1693b7844a6c06d31a565e5a494948034dfd235","status":"affected","version":"8b7138814f29933898ecd31dfc83e35a30ee69f5","versionType":"git"},{"lessThan":"a4b52612004a5639c4bfc30ba93ba414b8326e2a","status":"affected","version":"8b7138814f29933898ecd31dfc83e35a30ee69f5","versionType":"git"},{"lessThan":"ae1b2f8e21a41e7c7e75511bea0c4ccc59ec1bd3","status":"affected","version":"8b7138814f29933898ecd31dfc83e35a30ee69f5","versionType":"git"},{"lessThan":"0c4882bff34558d8d53fb04c3e96da5c327c7dc8","status":"affected","version":"8b7138814f29933898ecd31dfc83e35a30ee69f5","versionType":"git"},{"lessThan":"2504a76e5c0694e14e15562730e1339f2d9f9458","status":"affected","version":"8b7138814f29933898ecd31dfc83e35a30ee69f5","versionType":"git"},{"lessThan":"cd2f1d9fe8a507c2dc86ad326fe221f121c47734","status":"affected","version":"8b7138814f29933898ecd31dfc83e35a30ee69f5","versionType":"git"},{"lessThan":"a1ae353d8355407c1bea971d1c1af5e7f242bb7d","status":"affected","version":"8b7138814f29933898ecd31dfc83e35a30ee69f5","versionType":"git"},{"lessThan":"2a33516f9ef59ad11844d4fc152f889449b5daf3","status":"affected","version":"8b7138814f29933898ecd31dfc83e35a30ee69f5","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["net/sched/sch_cake.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"4.19"},{"lessThan":"4.19","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"5.10.*","status":"unaffected","version":"5.10.265","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.216","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.183","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":"5.10.265","versionStartIncluding":"4.19","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.15.216","versionStartIncluding":"4.19","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.183","versionStartIncluding":"4.19","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.152","versionStartIncluding":"4.19","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.104","versionStartIncluding":"4.19","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.45","versionStartIncluding":"4.19","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.1.9","versionStartIncluding":"4.19","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2","versionStartIncluding":"4.19","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet/sched: sch_cake: drop WARN_ON(1) for malformed packets in ACK filter\n\nThe sch_cake ACK filter parses packets to find the TCP header and filter\nduplicated ACKs if the flow is backlogged. The parsing code contains a\nWARN_ON(1) which can be triggered by a malformed IP header in certain\ncases. Depending on the system configuration, this leads either to\neither spamming dmesg with warnings, or a panic if panic_on_warn is set.\n\nThe code already correctly skips the offending packet in the branch that\ntriggers the warning, so the WARN_ON itself doesn't really serve any\npurpose. So just drop it altogether to avoid the inconvenient side\neffects."}],"providerMetadata":{"dateUpdated":"2026-08-22T15:33:03.491Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/c1693b7844a6c06d31a565e5a494948034dfd235"},{"url":"https://git.kernel.org/stable/c/a4b52612004a5639c4bfc30ba93ba414b8326e2a"},{"url":"https://git.kernel.org/stable/c/ae1b2f8e21a41e7c7e75511bea0c4ccc59ec1bd3"},{"url":"https://git.kernel.org/stable/c/0c4882bff34558d8d53fb04c3e96da5c327c7dc8"},{"url":"https://git.kernel.org/stable/c/2504a76e5c0694e14e15562730e1339f2d9f9458"},{"url":"https://git.kernel.org/stable/c/cd2f1d9fe8a507c2dc86ad326fe221f121c47734"},{"url":"https://git.kernel.org/stable/c/a1ae353d8355407c1bea971d1c1af5e7f242bb7d"},{"url":"https://git.kernel.org/stable/c/2a33516f9ef59ad11844d4fc152f889449b5daf3"}],"title":"net/sched: sch_cake: drop WARN_ON(1) for malformed packets in ACK filter","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-74704","datePublished":"2026-08-22T15:33:03.491Z","dateReserved":"2026-08-15T05:44:03.927Z","dateUpdated":"2026-08-22T15:33:03.491Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-08-22 16:16:45","lastModifiedDate":"2026-08-22 16:16:45","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"74704","Ordinal":"1","Title":"net/sched: sch_cake: drop WARN_ON(1) for malformed packets in AC","CVE":"CVE-2026-74704","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"74704","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet/sched: sch_cake: drop WARN_ON(1) for malformed packets in ACK filter\n\nThe sch_cake ACK filter parses packets to find the TCP header and filter\nduplicated ACKs if the flow is backlogged. The parsing code contains a\nWARN_ON(1) which can be triggered by a malformed IP header in certain\ncases. Depending on the system configuration, this leads either to\neither spamming dmesg with warnings, or a panic if panic_on_warn is set.\n\nThe code already correctly skips the offending packet in the branch that\ntriggers the warning, so the WARN_ON itself doesn't really serve any\npurpose. So just drop it altogether to avoid the inconvenient side\neffects.","Type":"Description","Title":"net/sched: sch_cake: drop WARN_ON(1) for malformed packets in AC"}]}}}