{"id":"CVE-2026-74704","title":"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 th…","summary":"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 th…","severity":"high","cvss":8.2,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H","published":"2026-08-22","updated":"2026-10-14","sourceUpdated":"2026-10-14T13:10:00.187","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-74704","references":[{"url":"https://git.kernel.org/stable/c/0c4882bff34558d8d53fb04c3e96da5c327c7dc8","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/2504a76e5c0694e14e15562730e1339f2d9f9458","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/2a33516f9ef59ad11844d4fc152f889449b5daf3","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/a1ae353d8355407c1bea971d1c1af5e7f242bb7d","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/a4b52612004a5639c4bfc30ba93ba414b8326e2a","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/ae1b2f8e21a41e7c7e75511bea0c4ccc59ec1bd3","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/c1693b7844a6c06d31a565e5a494948034dfd235","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/cd2f1d9fe8a507c2dc86ad326fe221f121c47734","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"tags":["nvd"],"epss":0.00443,"epssPercentile":0.36746,"ingestedAt":"2026-10-14T13:30:58.542Z","slug":"CVE-2026-74704","body":"## Overview\n\nIn 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":45,"depthScoreParts":{"impact":45.1,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}