Missing Release of Resource after Effective Lifetime in Linux kernel - CVE-2026-89446
Published: September 12, 2026
Vulnerability identifier: #VU149357
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-2026-89446
CWE-ID: CWE-772
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 improper resource release in iommufd_take_all_iova_rwsem() when xa_store() fails while storing an IOAS in the temporary ioas_list xarray. A local user can trigger an xa_store() failure while taking IOAS IOVA read-write semaphores to cause a denial of service.
Affected software
Linux kernel
How to mitigate CVE-2026-89446
Install security update from vendor's repository.