CVE-2026-89449
kernel: iommu: Fix dev_iommu memory leak when device_add fails in iommu_mock_device_add
Severity
LowRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · September 11, 2026
Updated · October 29, 2026
Description
A flaw was found in the Linux kernel's Input-Output Memory Management Unit (IOMMU) subsystem. When a device addition fails during the iommu_mock_device_add() operation, the allocated device IOMMU structure is not properly deallocated. This oversight leads to a memory leak, which over time could be exploited by a local attacker to cause a denial of service (DoS) by exhausting system memory.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CVSS 3.1 · 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE-772 · Missing Release of Resource after Effective Lifetime