Description
In 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.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
8b7138814f29933898ecd31dfc83e35a30ee69f5 to < c1693b7844a6c06d31a565e5a494948034dfd235affected8b7138814f29933898ecd31dfc83e35a30ee69f5 to < a4b52612004a5639c4bfc30ba93ba414b8326e2aaffected8b7138814f29933898ecd31dfc83e35a30ee69f5 to < ae1b2f8e21a41e7c7e75511bea0c4ccc59ec1bd3affected8b7138814f29933898ecd31dfc83e35a30ee69f5 to < 0c4882bff34558d8d53fb04c3e96da5c327c7dc8affected8b7138814f29933898ecd31dfc83e35a30ee69f5 to < 2504a76e5c0694e14e15562730e1339f2d9f9458affected8b7138814f29933898ecd31dfc83e35a30ee69f5 to < cd2f1d9fe8a507c2dc86ad326fe221f121c47734affected8b7138814f29933898ecd31dfc83e35a30ee69f5 to < a1ae353d8355407c1bea971d1c1af5e7f242bb7daffected8b7138814f29933898ecd31dfc83e35a30ee69f5 to < 2a33516f9ef59ad11844d4fc152f889449b5daf3affected
Linux Linux
Default version status: affected
4.19affected0 to < 4.19unaffected5.10.265 to ≤ 5.10.*unaffected5.15.216 to ≤ 5.15.*unaffected6.1.183 to ≤ 6.1.*unaffected6.6.152 to ≤ 6.6.*unaffected6.12.104 to ≤ 6.12.*unaffected6.18.45 to ≤ 6.18.*unaffected7.1.9 to ≤ 7.1.*unaffected7.2 to ≤ *unaffected
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 ↗