SB2025100431 - Infinite loop in Linux kernel crypto
Published: October 4, 2025
Security Bulletin ID
SB2025100431
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) Infinite loop (CVE-ID: CVE-2025-39931)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to infinite loop within the af_alg_sendmsg() function in crypto/af_alg.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/045ee26aa3920a47ec46d7fcb302420bf01fd753
- https://git.kernel.org/stable/c/2374c11189ef704a3e4863646369f1b8e6a27d71
- https://git.kernel.org/stable/c/24c1106504c625fabd3b7229611af617b4c27ac7
- https://git.kernel.org/stable/c/6241b9e2809b12da9130894cf5beddf088dc1b8a
- https://git.kernel.org/stable/c/9574b2330dbd2b5459b74d3b5e9619d39299fc6f