SB2025120520 - Anolis OS update for grub2
Published: December 5, 2025
Security Bulletin ID
SB2025120520
Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Physical access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Use-after-free (CVE-ID: CVE-2025-54771)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to the file-closing process incorrectly retains a memory pointer, leaving an invalid reference to a file system structure within the grub_file_read() function in grub-core/kern/file.c. A local user can trigger a use-after-free error and crash the application.
Remediation
Install update from vendor's website.