SB20251208123 - Race condition in Linux kernel nfsd
Published: December 8, 2025
Security Bulletin ID
SB20251208123
CSH 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 vulnerability.
1) Race condition (CVE-ID: CVE-2025-40324)
CWE-ID: CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
CVSSv4: 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
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to a race condition within the nfsd4_read() function in fs/nfsd/nfs4proc.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/03524ccff698d4a77d096ed529073d91f5edee5d
- https://git.kernel.org/stable/c/2ac46606b2cc49e78d8e3d8f2685e79e9ba73020
- https://git.kernel.org/stable/c/375fdd8993cecc48afa359728a6e70b280dde1c8
- https://git.kernel.org/stable/c/8f244b773c63fa480c9a3bd1ae04f5272f285e89
- https://git.kernel.org/stable/c/930cb4fe3ab4061be31f20ee30bb72a66f7bb6d1
- https://git.kernel.org/stable/c/a4948875ed0599c037dc438c11891c9012721b1d
- https://git.kernel.org/stable/c/abb1f08a2121dd270193746e43b2a9373db9ad84