Improper input validation in Linux kernel - CVE-2026-64291
Published: July 27, 2026
Vulnerability identifier: #VU139703
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-2026-64291
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 input validation in iommufd_veventq_alloc() when allocating a virtual event queue with a user-supplied veventq_depth value. A local user can provide an excessively large queue depth value to cause a denial of service.
Affected software
Linux kernel
How to mitigate CVE-2026-64291
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3