Resource exhaustion in Linux kernel - CVE-2026-64292
Published: July 27, 2026
Vulnerability identifier: #VU139704
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-2026-64292
CWE-ID: CWE-400
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 uncontrolled resource consumption in iommufd vevent queue handling when allocating user-influenced event queue memory under a spinlock. A local user can request large queues to exhaust atomic memory reserves to cause a denial of service.
The queue depth is decided by userspace, and allocation occurs in the event reporting path.
Affected software
Linux kernel
How to mitigate CVE-2026-64292
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3