SB20260727293 - Resource exhaustion in Linux kernel iommu iommufd driver
Published: July 27, 2026
Security Bulletin ID
SB20260727293
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Resource exhaustion (CVE-ID: CVE-2026-64292)
CWE-ID: CWE-400 - Resource exhaustion
CVSSv4: 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]
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.
Remediation
Install update from vendor's website.