SB20260912338 - Memory leak in Linux kernel iommu driver
Published: September 12, 2026
Security Bulletin ID
SB20260912338
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Partial DoS
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Memory leak (CVE-ID: CVE-2026-89449)
CWE-ID: CWE-401 - Missing release of memory after effective lifetime
CVSSv4: 2 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to missing release of memory after effective lifetime in the iommu_mock_device_add() error path when device_add() fails while handling an iommufd test ioctl. A local user can invoke the affected ioctl and trigger the failure path to cause a denial of service.
Remediation
Install update from vendor's website.