CVE-2025-37947

Name: CVE-2025-37947
Creator: NVD / NIST
Published: 2025-05-20T16:15:32.677+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.8/10EPSS 0.20%

Last modified Jun 17, 2026

CVE-2025-37947 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. 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.. EPSS estimates a 0.20% chance of exploitation in the next 30 days.

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:H

EPSS Probability

0.20%

10.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions	Update
Linux	Linux Kernel	>= 5.15, < 6.1.139	—
Linux	Linux Kernel	>= 6.2, < 6.6.91	—
Linux	Linux Kernel	>= 6.7, < 6.12.29	—
Linux	Linux Kernel	>= 6.13, < 6.14.7	—
Linux	Linux Kernel	6.15	Rc1
Debian	Debian Linux	11.0	—

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: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2025-37947?

How severe is CVE-2025-37947?

CVE-2025-37947 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 0.20% probability of exploitation in the next 30 days.

How do I fix CVE-2025-37947?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2025-37947?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST