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.
Metrics
CVSS 3.1 7.8/10
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HWeakness enumeration
Affected software
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux | >= 0626e6641f6b467447c81dd7678a69c66f7746cf, < 7f61da79df86fd140c7768e668ad846bfa7ec8e1; >= 0626e6641f6b467447c81dd7678a69c66f7746cf, < 04c8a38c60346bb5a7c49b276de7233f703ce9cb; >= 0626e6641f6b467447c81dd7678a69c66f7746cf, < d62ba16563a86aae052f96d270b3b6f78fca154c; >= 0626e6641f6b467447c81dd7678a69c66f7746cf, < e6356499fd216ed6343ae0363f4c9303f02c5034; >= 0626e6641f6b467447c81dd7678a69c66f7746cf, < 0ca6df4f40cf4c32487944aaf48319cb6c25accc |
| Linux | Linux | 5.15 |
References
- https://git.kernel.org/stable/c/04c8a38c60346bb5a7c49b276de7233f703ce9cbPatch
- https://git.kernel.org/stable/c/0ca6df4f40cf4c32487944aaf48319cb6c25acccPatch
- https://git.kernel.org/stable/c/7f61da79df86fd140c7768e668ad846bfa7ec8e1Patch
- https://git.kernel.org/stable/c/d62ba16563a86aae052f96d270b3b6f78fca154cPatch
- https://git.kernel.org/stable/c/e6356499fd216ed6343ae0363f4c9303f02c5034Patch
- https://lists.debian.org/debian-lts-announce/2025/08/msg00010.htmlMailing List, Third Party Advisory
- https://github.com/doyensec/KSMBD-CVE-2025-37947/blob/main/CVE-2025-37947.cMailing List, Third Party Advisory
Timeline
- Published
- May 20, 2025
- Last modified
- Jul 30, 2026
- NVD status
- Modified