SB2025040125 - Use-after-free in Linux kernel
Published: April 1, 2025 Updated: May 11, 2025
Security Bulletin ID
SB2025040125
Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Use-after-free (CVE-ID: CVE-2025-21893)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the key_put() function in security/keys/key.c, within the rb_entry() function in security/keys/gc.c. A local user can escalate privileges on the system.
Remediation
Install update from vendor's website.