Description
In the Linux kernel, the following vulnerability has been resolved:
iommufd: Avoid locking internal accesses during unmap
iommufd_access_notify_unmap() skips internal accesses because they do not have an external unmap callback to invoke.
However, the current test calls iommufd_lock_obj() before checking whether the access is internal. If iommufd_lock_obj() succeeds, the loop then sees the internal access and continues, bypassing the matching iommufd_put_object() used by the normal unmap path. This leaks the object reference taken by iommufd_lock_obj().
Check for internal accesses first so skipped entries are never locked.
Metrics
No CVSS score has been published yet.
Affected software
Source: the vendor's advisory (CNA). NVD analysis pending.
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux | >= 27b77ea5feaa8fcf385ea99ce757982b0ac9d1f0, < 436189ee4bb2c7c993b945d68570dd38c3e4349e; >= 27b77ea5feaa8fcf385ea99ce757982b0ac9d1f0, < 50a66a63d1c841ae6b28a4551f642c1bba4c9529; >= 27b77ea5feaa8fcf385ea99ce757982b0ac9d1f0, < 0dbcdf4473a614adbd732d567c9b39ac0e040e0c |
| Linux | Linux | 6.17 |
References
Timeline
- Published
- Sep 11, 2026
- Last modified
- Oct 19, 2026
- NVD status
- Received