SB2025040279 - Improper locking in Linux kernel smb server
Published: April 2, 2025 Updated: May 11, 2025
Security Bulletin ID
SB2025040279
Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Improper locking (CVE-ID: CVE-2025-21944)
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.
Remediation
Install update from vendor's website.
References
- 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