Improper Check or Handling of Exceptional Conditions in Linux kernel - CVE-2026-53333
Published: July 2, 2026
Vulnerability identifier: #VU136718
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-53333
CWE-ID: CWE-703
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability description
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to improper handling of non-swap entries in mincore_swap() in mm/mincore.c when processing migration, hwpoison, or shmem swapin-error entries on kernels built without swap support. A local user can trigger mincore page table handling of such entries to cause a denial of service.
Only kernels built without swap support are affected, and the issue can arise when migration or memory failure related features are enabled.
How to mitigate CVE-2026-53333
Install security update from vendor's repository.