SB2025100965 - Input validation error in Linux kernel io_uring
Published: October 9, 2025
Security Bulletin ID
SB2025100965
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) Input validation error (CVE-ID: CVE-2025-39963)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to improper input validation within the io_link_skb() function in io_uring/notif.c. A local user can perform a denial of service (DoS) attack.
Remediation
Install update from vendor's website.