Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: net/sched: Only allow act_ct to bind to clsact/ingress qdiscs and shared blocks As Paolo said earlier [1]: "Since the blamed commit below, classify can return TC_ACT_CONSUMED while the current skb being held by the defragmentation engine. As reported by GangMin Kim, if such packet is that may cause a UaF when the defrag engine later on tries to tuch again such packet." act_ct was never meant to be used in the egress path, however some users are attaching it to egress today [2]. Attempting to reach a middle ground, we noticed that, while most qdiscs are not handling TC_ACT_CONSUMED, clsact/ingress qdiscs are. With that in mind, we address the issue by only allowing act_ct to bind to clsact/ingress qdiscs and shared blocks. That way it's still possible to attach act_ct to egress (albeit only with clsact). [1] https://lore.kernel.org/netdev/674b8cbfc385c6f37fb29a1de08d8fe5c2b0fbee.1771321118.git.pabeni@redhat.com/ [2] https://lore.kernel.org/netdev/cc6bfb4a-4a2b-42d8-b9ce-7ef6644fb22b@ovn.org/
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 172ba7d46c202e679f3ccb10264c67416aaeb1c4 before bc4e5bb529823a09f02dbe96169de679a9db26e0; affected 0b5b831122fc3789fff75be433ba3e4dd7b779d4 before fb3c380a54e33d1fd272cc342faa906d787d7ef1; affected 73f7da5fd124f2cda9161e2e46114915e6e82e97 before 5a110ddcc99bda77a28598b3555fe009eaab3828; affected 3f14b377d01d8357eba032b4cabc8c1149b458b6 before 524ce8b4ea8f64900b6c52b6a28df74f6bc0801e; affected 3f14b377d01d8357eba032b4cabc8c1149b458b6 before 380ad8b7c65ea7aa10ef2258297079ed5ac1f5b6; affected 3f14b377d01d8357eba032b4cabc8c1149b458b6 before 9deda0fcda5c1f388c5e279541850b71a2ccfcf4; affected 3f14b377d01d8357eba032b4cabc8c1149b458b6 before 11cb63b0d1a0685e0831ae3c77223e002ef18189; affected f5346df0591d10bc948761ca854b1fae6d2ef441; affected 5.15.148 before 5.15.203; affected 6.1.75 before 6.1.167; affected 6.6.14 before 6.6.130; affected 6.7.2 before 6.8 |
| Linux / Linux | affected 6.8; unaffected 0 before 6.8; unaffected 5.15.203 through 5.15.*; unaffected 6.1.167 through 6.1.*; unaffected 6.6.130 through 6.6.*; unaffected 6.12.77 through 6.12.*; unaffected 6.18.18 through 6.18.*; unaffected 6.19.8 through 6.19.*; unaffected 7.0 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/bc4e5bb529823a09f02dbe96169de679a9db26e0
- https://git.kernel.org/stable/c/fb3c380a54e33d1fd272cc342faa906d787d7ef1
- https://git.kernel.org/stable/c/5a110ddcc99bda77a28598b3555fe009eaab3828
- https://git.kernel.org/stable/c/524ce8b4ea8f64900b6c52b6a28df74f6bc0801e
- https://git.kernel.org/stable/c/380ad8b7c65ea7aa10ef2258297079ed5ac1f5b6
- https://git.kernel.org/stable/c/9deda0fcda5c1f388c5e279541850b71a2ccfcf4
- https://git.kernel.org/stable/c/11cb63b0d1a0685e0831ae3c77223e002ef18189
ADP enrichment
No English description supplied.
No English description supplied.
No references supplied.