CVE-2025-37947
HIGH severity · CVSS 8.8 · Out-of-bounds write
8.8CVSS HIGH
Summary
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 & exploitability
Attack vectorNetwork
Attack complexityLow
Privileges requiredLow
User interactionNone
Confidentiality impactHigh
Integrity impactHigh
Availability impactHigh
Exploit probability (EPSS)0%
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Affected products we track (2)
Recommendation
Apply the vendor fix promptly. Open any affected product above for its exact safe version.
Official patch: https://git.kernel.org/stable/c/04c8a38c60346bb5a7c49b276de7233f703ce9cb ↗
Additional information
- NVD record
- 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.htmlAdvisory
- https://github.com/doyensec/KSMBD-CVE-2025-37947/blob/main/CVE-2025-37947.cAdvisory