Improper locking in Linux kernel - CVE-2025-21944
Published: April 2, 2025 / Updated: May 11, 2025
Vulnerability identifier: #VU106762
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2025-21944
CWE-ID: CWE-667
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability description
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to improper locking within the vfs_lock_file() function in fs/smb/server/smb2pdu.c. A local user can perform a denial of service (DoS) attack.
How to mitigate CVE-2025-21944
Install update from vendor's website.
Sources
- https://git.kernel.org/stable/c/11e0e74e14f1832a95092f2c98ed3b99f57797ee
- https://git.kernel.org/stable/c/2b70e3ac79eacbdf32571f7af48dd81cdd957ca8
- https://git.kernel.org/stable/c/8994f0ce8259f812b4f4a681d8298c6ff682efaa
- https://git.kernel.org/stable/c/dbcd7fdd86f77529210fe8978154a81cd479844c
- https://git.kernel.org/stable/c/e26e2d2e15daf1ab33e0135caf2304a0cfa2744b
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.1.131
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.12.19
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.13.7
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.14
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.6.83