Description
In the Linux kernel, the following vulnerability has been resolved: rxrpc: serialize kernel accept preallocation with socket teardown rxrpc_kernel_charge_accept() reads rx->backlog without any socket/backlog synchronization and passes that raw pointer into rxrpc_service_prealloc_one(). A concurrent rxrpc_discard_prealloc() sets rx->backlog = NULL and frees the backlog rings, so a kernel preallocation worker can keep using a freed struct rxrpc_backlog while updating *_backlog_head/tail and array slots. Serialize the state check and backlog lookup with the socket lock, and reject kernel preallocation once teardown has disabled listening or discarded the service backlog.
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
00e907127e6f86d0f9b122d9b4347a8aa09a8b61 to < d6207326b4ca0ae1041281b6af9df53f8080669aaffected00e907127e6f86d0f9b122d9b4347a8aa09a8b61 to < 11b429b84c87cb5a0152f14e7d6cb649ed363901affected00e907127e6f86d0f9b122d9b4347a8aa09a8b61 to < c20d983968f239574290cf804a58cde18ad1c559affected00e907127e6f86d0f9b122d9b4347a8aa09a8b61 to < 0337cdba0c477f176c0459bed012109453184573affected00e907127e6f86d0f9b122d9b4347a8aa09a8b61 to < dfa0b2bbc5e50119f89c6b5407faa5ed86dfa7c5affected00e907127e6f86d0f9b122d9b4347a8aa09a8b61 to < 35a967ff8b24db09ee429c39c5b5e6571639997daffected00e907127e6f86d0f9b122d9b4347a8aa09a8b61 to < 1741378a7a83dfd8e53a9196730df709b903cd33affected00e907127e6f86d0f9b122d9b4347a8aa09a8b61 to < dc175389b18c29a5303ee83169ec653adfae3e17affected
Linux Linux
Default version status: affected
4.9affected0 to < 4.9unaffected5.10.266 to ≤ 5.10.*unaffected5.15.217 to ≤ 5.15.*unaffected6.1.184 to ≤ 6.1.*unaffected6.6.148 to ≤ 6.6.*unaffected6.12.101 to ≤ 6.12.*unaffected6.18.40 to ≤ 6.18.*unaffected7.1.5 to ≤ 7.1.*unaffected7.2 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/d6207326b4ca0ae1041281b6af9df53f8080669a ↗
- https://git.kernel.org/stable/c/11b429b84c87cb5a0152f14e7d6cb649ed363901 ↗
- https://git.kernel.org/stable/c/c20d983968f239574290cf804a58cde18ad1c559 ↗
- https://git.kernel.org/stable/c/0337cdba0c477f176c0459bed012109453184573 ↗
- https://git.kernel.org/stable/c/dfa0b2bbc5e50119f89c6b5407faa5ed86dfa7c5 ↗
- https://git.kernel.org/stable/c/35a967ff8b24db09ee429c39c5b5e6571639997d ↗
- https://git.kernel.org/stable/c/1741378a7a83dfd8e53a9196730df709b903cd33 ↗
- https://git.kernel.org/stable/c/dc175389b18c29a5303ee83169ec653adfae3e17 ↗