Improper input validation in Linux kernel - CVE-2026-90064
Published: September 19, 2026
Vulnerability identifier: #VU151415
CSH Severity: Low
CVSS v4: 4.8 [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]
CVE-ID: CVE-2026-90064
CWE-ID: CWE-20
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to improper validation of VM fault mode in the xe_pagefault_asid_to_vm ASID lookup when processing a page fault from a non-fault-mode scratch VM on an already valid VMA. A local user can trigger such a page fault to cause a denial of service.
Affected software
Linux kernel
How to mitigate CVE-2026-90064
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3