net/sched: sch_cake: drop WARN_ON(1) for malformed packets in ACK filter

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-74704
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-22 16:16:45 UTC
Updated2026-08-22 16:16:45 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: net/sched: sch_cake: drop WARN_ON(1) for malformed packets in ACK filter The sch_cake ACK filter parses packets to find the TCP header and filter duplicated ACKs if the flow is backlogged. The parsing code contains a WARN_ON(1) which can be triggered by a malformed IP header in certain cases. Depending on the system configuration, this leads either to either spamming dmesg with warnings, or a panic if panic_on_warn is set. The code already correctly skips the offending packet in the branch that triggers the warning, so the WARN_ON itself doesn't really serve any purpose. So just drop it altogether to avoid the inconvenient side effects.

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 8b7138814f29933898ecd31dfc83e35a30ee69f5 c1693b7844a6c06d31a565e5a494948034dfd235 git Not specified
CNA Linux Linux affected 8b7138814f29933898ecd31dfc83e35a30ee69f5 a4b52612004a5639c4bfc30ba93ba414b8326e2a git Not specified
CNA Linux Linux affected 8b7138814f29933898ecd31dfc83e35a30ee69f5 ae1b2f8e21a41e7c7e75511bea0c4ccc59ec1bd3 git Not specified
CNA Linux Linux affected 8b7138814f29933898ecd31dfc83e35a30ee69f5 0c4882bff34558d8d53fb04c3e96da5c327c7dc8 git Not specified
CNA Linux Linux affected 8b7138814f29933898ecd31dfc83e35a30ee69f5 2504a76e5c0694e14e15562730e1339f2d9f9458 git Not specified
CNA Linux Linux affected 8b7138814f29933898ecd31dfc83e35a30ee69f5 cd2f1d9fe8a507c2dc86ad326fe221f121c47734 git Not specified
CNA Linux Linux affected 8b7138814f29933898ecd31dfc83e35a30ee69f5 a1ae353d8355407c1bea971d1c1af5e7f242bb7d git Not specified
CNA Linux Linux affected 8b7138814f29933898ecd31dfc83e35a30ee69f5 2a33516f9ef59ad11844d4fc152f889449b5daf3 git Not specified
CNA Linux Linux affected 4.19 Not specified
CNA Linux Linux unaffected 4.19 semver Not specified
CNA Linux Linux unaffected 5.10.265 5.10.* semver Not specified
CNA Linux Linux unaffected 5.15.216 5.15.* semver Not specified
CNA Linux Linux unaffected 6.1.183 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.152 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.104 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.45 6.18.* semver Not specified
CNA Linux Linux unaffected 7.1.9 7.1.* semver Not specified
CNA Linux Linux unaffected 7.2 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/c1693b7844a6c06d31a565e5a494948034dfd235 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/0c4882bff34558d8d53fb04c3e96da5c327c7dc8 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/cd2f1d9fe8a507c2dc86ad326fe221f121c47734 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/ae1b2f8e21a41e7c7e75511bea0c4ccc59ec1bd3 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/a1ae353d8355407c1bea971d1c1af5e7f242bb7d 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/a4b52612004a5639c4bfc30ba93ba414b8326e2a 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/2a33516f9ef59ad11844d4fc152f889449b5daf3 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/2504a76e5c0694e14e15562730e1339f2d9f9458 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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