#VU120724 Use-after-free in Linux kernel - CVE-2023-54194
Published: December 30, 2025 / Updated: December 31, 2025
Vulnerability identifier: #VU120724
Vulnerability risk: Low
CVSSv4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2023-54194
CWE-ID: CWE-416
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerable software:
Linux kernel
Linux kernel
Software vendor:
Linux Foundation
Linux Foundation
Description
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 repository.
External links
- 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