Memory leak in Linux kernel - CVE-2026-89449
Published: September 12, 2026
Vulnerability identifier: #VU149360
CSH Severity: Low
CVSS v4: 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]
CVE-ID: CVE-2026-89449
CWE-ID: CWE-401
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 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.
Affected software
Linux kernel
How to mitigate CVE-2026-89449
Install security update from vendor's repository.