SB20250916134 - Use-after-free in Linux kernel btrfs
Published: September 16, 2025
Security Bulletin ID
SB20250916134
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-2025-39759)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the btrfs_check_quota_leak() and btrfs_qgroup_rescan() functions in fs/btrfs/qgroup.c. A local user can escalate privileges on the system.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/2fd0f5ceb997f90f4332ccbab6c7e907e6b2d0eb
- https://git.kernel.org/stable/c/7cda0fdde5d9890976861421d207870500f9aace
- https://git.kernel.org/stable/c/b172535ccba12f0cf7d23b3b840989de47fc104d
- https://git.kernel.org/stable/c/c38028ce0d0045ca600b6a8345a0ff92bfb47b66
- https://git.kernel.org/stable/c/dd0b28d877b293b1d7f8727a7de08ae36b6b9ef0
- https://git.kernel.org/stable/c/e1249667750399a48cafcf5945761d39fa584edf