Description
In the Linux kernel, the following vulnerability has been resolved: sctp: clear control chunk transport if it is being removed sctp_make_heartbeat_ack() caches the destination transport in chunk->transport without taking a reference. When src_out_of_asoc_ok is enabled, the HEARTBEAT ACK may remain queued on control_chunk_list instead of being transmitted immediately. If the peer transport is removed while the chunk is still queued, sctp_assoc_rm_peer() drops the transport and schedules it for RCU freeing, but only clears cached transport pointers in out_chunk_list. The queued control chunk therefore retains a dangling transport pointer. Once an ASCONF_ACK clears the suppression and the queued control chunk is transmitted, SCTP dereferences the stale transport pointer, leading to a use-after-free. Fix this by also clearing chunk->transport for queued control chunks in control_chunk_list when removing the transport.
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
8a07eb0a50aebc8c95478d49c28c7f8419a26cef to < dbb3f418a8665ffb0514e1a9520ab6a1c5d4d886affected8a07eb0a50aebc8c95478d49c28c7f8419a26cef to < fad4766a74220fe579c6fcaa10ba01c23529814faffected8a07eb0a50aebc8c95478d49c28c7f8419a26cef to < 936658ec41c28c397ef390140e02d4c91ade92f0affected8a07eb0a50aebc8c95478d49c28c7f8419a26cef to < 8de65194a04d2552cd39b6c67d942d490f22d174affected8a07eb0a50aebc8c95478d49c28c7f8419a26cef to < 6160e756db81d6cb63e3e2952efcf6c5134be385affected8a07eb0a50aebc8c95478d49c28c7f8419a26cef to < 18d704bdd809377dfd81a3c2f42426763b5da227affected8a07eb0a50aebc8c95478d49c28c7f8419a26cef to < 4d6b9cac6df5e0cfef1a66b3edd7aebdb9e4b7e7affected8a07eb0a50aebc8c95478d49c28c7f8419a26cef to < c9158ceaf27780ef64534ad72f44ffde3f8ccc49affected
Linux Linux
Default version status: affected
3.1affected0 to < 3.1unaffected5.10.265 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/dbb3f418a8665ffb0514e1a9520ab6a1c5d4d886 ↗
- https://git.kernel.org/stable/c/fad4766a74220fe579c6fcaa10ba01c23529814f ↗
- https://git.kernel.org/stable/c/936658ec41c28c397ef390140e02d4c91ade92f0 ↗
- https://git.kernel.org/stable/c/8de65194a04d2552cd39b6c67d942d490f22d174 ↗
- https://git.kernel.org/stable/c/6160e756db81d6cb63e3e2952efcf6c5134be385 ↗
- https://git.kernel.org/stable/c/18d704bdd809377dfd81a3c2f42426763b5da227 ↗
- https://git.kernel.org/stable/c/4d6b9cac6df5e0cfef1a66b3edd7aebdb9e4b7e7 ↗
- https://git.kernel.org/stable/c/c9158ceaf27780ef64534ad72f44ffde3f8ccc49 ↗