Description
In the Linux kernel, the following vulnerability has been resolved: ksmbd: prevent out-of-bounds stream writes by validating *pos ksmbd_vfs_stream_write() did not validate whether the write offset (*pos) was within the bounds of the existing stream data length (v_len). If *pos was greater than or equal to v_len, this could lead to an out-of-bounds memory write. This patch adds a check to ensure *pos is less than v_len before proceeding. If the condition fails, -EINVAL is returned.
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 < 7f61da79df86fd140c7768e668ad846bfa7ec8e1affected0626e6641f6b467447c81dd7678a69c66f7746cf to < 04c8a38c60346bb5a7c49b276de7233f703ce9cbaffected0626e6641f6b467447c81dd7678a69c66f7746cf to < d62ba16563a86aae052f96d270b3b6f78fca154caffected0626e6641f6b467447c81dd7678a69c66f7746cf to < e6356499fd216ed6343ae0363f4c9303f02c5034affected0626e6641f6b467447c81dd7678a69c66f7746cf to < 0ca6df4f40cf4c32487944aaf48319cb6c25acccaffected
Linux Linux
Default version status: affected
5.15affected0 to < 5.15unaffected6.1.139 to ≤ 6.1.*unaffected6.6.91 to ≤ 6.6.*unaffected6.12.29 to ≤ 6.12.*unaffected6.14.7 to ≤ 6.14.*unaffected6.15 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/7f61da79df86fd140c7768e668ad846bfa7ec8e1 ↗
- https://git.kernel.org/stable/c/04c8a38c60346bb5a7c49b276de7233f703ce9cb ↗
- https://git.kernel.org/stable/c/d62ba16563a86aae052f96d270b3b6f78fca154c ↗
- https://git.kernel.org/stable/c/e6356499fd216ed6343ae0363f4c9303f02c5034 ↗
- https://git.kernel.org/stable/c/0ca6df4f40cf4c32487944aaf48319cb6c25accc ↗
- https://github.com/doyensec/KSMBD-CVE-2025-37947/blob/main/CVE-2025-37947.c ↗
- https://lists.debian.org/debian-lts-announce/2025/08/msg00010.html ↗