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
linux: linux kernel; debian: debian linux
References7
- git.kernel.org/stable/c/04c8a38c60346bb5a7c49b276de7233f703ce9cb Patch
- git.kernel.org/stable/c/0ca6df4f40cf4c32487944aaf48319cb6c25accc Patch
- git.kernel.org/stable/c/7f61da79df86fd140c7768e668ad846bfa7ec8e1 Patch
- git.kernel.org/stable/c/d62ba16563a86aae052f96d270b3b6f78fca154c Patch
- git.kernel.org/stable/c/e6356499fd216ed6343ae0363f4c9303f02c5034 Patch
- lists.debian.org/debian-lts-announce/2025/08/msg00010.html Mailing ListThird Party Advisory
- github.com/doyensec/KSMBD-CVE-2025-37947/blob/main/CVE-2025-379… Mailing ListThird Party Advisory
Metrics
- CVSS 3.1
-
7.8
HIGH
Score source: NVD
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - EPSS — exploit probability
- 1% percentile: 52 · as of 7 November 2026
- CWE
- CWE-787
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