CVE-2025-37947 | BDVDB-2026-279658 Detail
LinuxLinux
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.
Impact#
Per CVSS v3.1: confidentiality impact high, integrity impact high, availability impact high. Attack vector: network.
Weaknesses#
- CWE-787 Out-of-bounds Write
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
Exploit#
History#
- Version 1Record published in the CVE List.
- Version 2Most recent update recorded in the CVE List.