{"id":"CVE-2026-74704","revision":"9b59e71f2dc6498d9897fb3fc6b5fe4a","records":[{"revision":"9b59e71f2dc6498d9897fb3fc6b5fe4a","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-74704","aliases":[],"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":0,"publishedAt":"2026-08-22T15:33:03.491+00:00","modifiedAt":"2026-10-16T19:16:10.461+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/sched/sch_cake.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"8b7138814f29933898ecd31dfc83e35a30ee69f5\",\n                            \"lessThan\": \"c1693b7844a6c06d31a565e5a494948034dfd235\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"8b7138814f29933898ecd31dfc83e35a30ee69f5\",\n                            \"lessThan\": \"a4b52612004a5639c4bfc30ba93ba414b8326e2a\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"8b7138814f29933898ecd31dfc83e35a30ee69f5\",\n                            \"lessThan\": \"ae1b2f8e21a41e7c7e75511bea0c4ccc59ec1bd3\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"8b7138814f29933898ecd31dfc83e35a30ee69f5\",\n                            \"lessThan\": \"0c4882bff34558d8d53fb04c3e96da5c327c7dc8\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"8b7138814f29933898ecd31dfc83e35a30ee69f5\",\n                            \"lessThan\": \"2504a76e5c0694e14e15562730e1339f2d9f9458\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"8b7138814f29933898ecd31dfc83e35a30ee69f5\",\n                            \"lessThan\": \"cd2f1d9fe8a507c2dc86ad326fe221f121c47734\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"8b7138814f29933898ecd31dfc83e35a30ee69f5\",\n                            \"lessThan\": \"a1ae353d8355407c1bea971d1c1af5e7f242bb7d\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"8b7138814f29933898ecd31dfc83e35a30ee69f5\",\n                            \"lessThan\": \"2a33516f9ef59ad11844d4fc152f889449b5daf3\",\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/sched/sch_cake.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"4.19\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"4.19\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.10.265\",\n                            \"lessThanOrEqual\": \"5.10.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.15.216\",\n                            \"lessThanOrEqual\": \"5.15.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.183\",\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:L/I:N/A:H","score":8.2,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/c1693b7844a6c06d31a565e5a494948034dfd235","https://git.kernel.org/stable/c/a4b52612004a5639c4bfc30ba93ba414b8326e2a","https://git.kernel.org/stable/c/ae1b2f8e21a41e7c7e75511bea0c4ccc59ec1bd3","https://git.kernel.org/stable/c/0c4882bff34558d8d53fb04c3e96da5c327c7dc8","https://git.kernel.org/stable/c/2504a76e5c0694e14e15562730e1339f2d9f9458","https://git.kernel.org/stable/c/cd2f1d9fe8a507c2dc86ad326fe221f121c47734","https://git.kernel.org/stable/c/a1ae353d8355407c1bea971d1c1af5e7f242bb7d","https://git.kernel.org/stable/c/2a33516f9ef59ad11844d4fc152f889449b5daf3"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-74704","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-74704","identifiers":["CVE-2026-74704"]},"retained":false,"historicalAffected":[]}],"coverage":[]}