Improper Check for Unusual or Exceptional Conditions in Linux kernel - CVE-2026-64131
Published: July 20, 2026
Vulnerability identifier: #VU138514
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-2026-64131
CWE-ID: CWE-754
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 check for unusual or exceptional conditions in mm/memory.c unmap path when unmapping device-private or exclusive pages from private file-backed mappings. A local user can trigger memory migration and unmapping operations to cause a denial of service.
The issue can result in a kernel warning during process teardown.
How to mitigate CVE-2026-64131
Install security update from vendor's repository.
Sources
- https://git.kernel.org/stable/c/2fff0cdd942261497fb8922a194b4da3315ae864
- https://git.kernel.org/stable/c/52f72b3f8f6fa64abb71b711962b97f1f6aced1c
- https://git.kernel.org/stable/c/a825691b804b35141aaf4eac91003a70846e316d
- https://git.kernel.org/stable/c/be3f38d05cc5a7c3f13e51994c5dd043ab604d28
- https://git.kernel.org/stable/c/e7af1b15c884ed12bb69da11aec095045d861ee8
- https://git.kernel.org/stable/c/e81446b559db4c98a6c2c5e039ac9cb23658432e