Buffer overflow in Linux kernel - CVE-2023-54239
Published: December 30, 2025
Vulnerability identifier: #VU120855
CSH Severity: Low
CVSS v4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2023-54239
CWE-ID: CWE-119
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to memory corruption within the iopt_alloc_pages() function in drivers/iommu/iommufd/pages.c. A local user can perform a denial of service (DoS) attack.
Affected software
Linux kernel
How to mitigate CVE-2023-54239
Install update from vendor's repository.
Linux kernel - addressed in versions 6.2.11, 6.3