SB2025021066 - Improper locking in Linux kernel io_uring
Published: February 10, 2025 Updated: May 11, 2025
Security Bulletin ID
SB2025021066
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) Improper locking (CVE-ID: CVE-2025-21686)
CWE-ID: CWE-667 - Improper Locking
CVSSv4: 5.1 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:U/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to improper locking within the io_clone_buffers() function in io_uring/rsrc.c. A local user can perform a denial of service (DoS) attack.
Remediation
Install update from vendor's website.