CVE-2025-21660: linux kernel — Fix

Description

In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix unexpectedly changed path in ksmbd_vfs_kern_path_locked When `ksmbd_vfs_kern_path_locked` met an error and it is not the last entry, it will exit without restoring changed path buffer. But later this buffer may be used as the filename for creation.

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CVSS v3.1 Score

5.5

MEDIUM

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected Products

Vendor	Product	Versions
linux	linux_kernel	6.1.113 — 6.1.125
linux	linux_kernel	6.6.54 — 6.6.72
linux	linux_kernel	6.10.13 — 6.11
linux	linux_kernel	6.11.2 — 6.12.10
linux	linux_kernel	All
linux	linux_kernel	All
linux	linux_kernel	All
linux	linux_kernel	All
linux	linux_kernel	All
linux	linux_kernel	All

References

Advisories & Patches

https://git.kernel.org/stable/c/13e41c58c74baa71f34c0830eaa3c29d53a6e964 https://git.kernel.org/stable/c/2ac538e40278a2c0c051cca81bcaafc547d61372 https://git.kernel.org/stable/c/51669f4af5f7959565b48e55691ba92fabf5c587 https://git.kernel.org/stable/c/65b31b9d992c0fb0685c51a0cf09993832734fc4

Other References

https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html

Frequently Asked Questions

What is CVE-2025-21660? +

In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix unexpectedly changed path in ksmbd_vfs_kern_path_locked When `ksmbd_vfs_kern_path_locked` met an error and it is not the last entry, it will exit without restoring changed path buffer. But later this buffer may be used as the filename for creation. It has a CVSS v3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2025-21660? +

CVE-2025-21660 has a CVSS v3.1 score of 5.5 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2025-21660? +

CVE-2025-21660 affects products from linux, specifically: linux_kernel. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-21660? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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CVE-2025-21660