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.

Classification

CVE ID: CVE-2025-37947

Affected Products

Vendor: Linux

Product: Linux

Exploit Prediction Scoring System (EPSS)

EPSS Score: 0.04% (probability of being exploited)

EPSS Percentile: 11.93% (scored less or equal to compared to others)

EPSS Date: 2025-06-18 (when was this score calculated)

References

https://nvd.nist.gov/vuln/detail/CVE-2025-37947
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

Timeline