SB2025042241 - Use-after-free in Linux kernel ext4
Published: April 22, 2025 Updated: May 11, 2025
Security Bulletin ID
SB2025042241
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-2025-22121)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the __ext4_xattr_check_block(), __xattr_check_inode(), ext4_xattr_ibody_get(), ext4_xattr_ibody_list(), ext4_get_inode_usage(), ext4_xattr_ibody_find() and sizeof() functions in fs/ext4/xattr.c, within the ext4_iget_extra_inode() function in fs/ext4/inode.c. A local user can escalate privileges on the system.
Remediation
Install update from vendor's website.