SB2025040288 - Improper locking in Linux kernel nfs
Published: April 2, 2025 Updated: May 11, 2025
Security Bulletin ID
SB2025040288
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-2025-21900)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to improper locking within the nfs4_atomic_open() function in fs/nfs/nfs4proc.c, within the nfs4_inode_return_delegation() function in fs/nfs/delegation.c. A local user can perform a denial of service (DoS) attack.
Remediation
Install update from vendor's website.