Description
In the Linux kernel, the following vulnerability has been resolved: ksmbd: validate zero num_subauth before sub_auth is accessed Access psid->sub_auth[psid->num_subauth - 1] without checking if num_subauth is non-zero leads to an out-of-bounds read. This patch adds a validation step to ensure num_subauth != 0 before sub_auth is accessed.
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
0626e6641f6b467447c81dd7678a69c66f7746cf to < 3ac65de111c686c95316ade660f8ba7aea3cd3ccaffected0626e6641f6b467447c81dd7678a69c66f7746cf to < 0e36a3e080d6d8bd7a34e089345d043da4ac8283affected0626e6641f6b467447c81dd7678a69c66f7746cf to < 56de7778a48560278c334077ace7b9ac4bfb2fd1affected0626e6641f6b467447c81dd7678a69c66f7746cf to < 68c6c3142bfcdb049839d40a9a59ebe8ea865002affected0626e6641f6b467447c81dd7678a69c66f7746cf to < c8bfe1954a0b89e7b29b3a3e7f4c5e0ebd295e20affected0626e6641f6b467447c81dd7678a69c66f7746cf to < bf21e29d78cd2c2371023953d9c82dfef82ebb36affected
Linux Linux
Default version status: affected
5.15affected0 to < 5.15unaffected6.1.134 to ≤ 6.1.*unaffected6.6.87 to ≤ 6.6.*unaffected6.12.23 to ≤ 6.12.*unaffected6.13.11 to ≤ 6.13.*unaffected6.14.2 to ≤ 6.14.*unaffected6.15 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/3ac65de111c686c95316ade660f8ba7aea3cd3cc ↗
- https://git.kernel.org/stable/c/0e36a3e080d6d8bd7a34e089345d043da4ac8283 ↗
- https://git.kernel.org/stable/c/56de7778a48560278c334077ace7b9ac4bfb2fd1 ↗
- https://git.kernel.org/stable/c/68c6c3142bfcdb049839d40a9a59ebe8ea865002 ↗
- https://git.kernel.org/stable/c/c8bfe1954a0b89e7b29b3a3e7f4c5e0ebd295e20 ↗
- https://git.kernel.org/stable/c/bf21e29d78cd2c2371023953d9c82dfef82ebb36 ↗
- https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html ↗