SB20251230169 - Use-after-free in Linux kernel exfat
Published: December 30, 2025 Updated: December 31, 2025
Security Bulletin ID
SB20251230169
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-2023-54194)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the exfat_allocate_bitmap() and exfat_free_bitmap() functions in fs/exfat/balloc.c. A local user can escalate privileges on the system.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/0c5c3e8a2550b6b2a304b45f260296db9c09df96
- https://git.kernel.org/stable/c/1427a7e96fb90d0896f74f5bcd21feb03cc7c3d0
- https://git.kernel.org/stable/c/79d16a84ea41272dfcb0c00f9798ddd0edd8098d
- https://git.kernel.org/stable/c/8a34a242cf03211cc89f68308d149b793f63c479
- https://git.kernel.org/stable/c/daf60d6cca26e50d65dac374db92e58de745ad26
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.190
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15.126
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.1.45
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.4.10
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.5