Description (CNA)
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.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 27b77ea5feaa8fcf385ea99ce757982b0ac9d1f0 before 436189ee4bb2c7c993b945d68570dd38c3e4349e; affected 27b77ea5feaa8fcf385ea99ce757982b0ac9d1f0 before 50a66a63d1c841ae6b28a4551f642c1bba4c9529; affected 27b77ea5feaa8fcf385ea99ce757982b0ac9d1f0 before 0dbcdf4473a614adbd732d567c9b39ac0e040e0c |
| Linux / Linux | affected 6.17; unaffected 0 before 6.17; unaffected 6.18.50 through 6.18.*; unaffected 7.2.4 through 7.2.*; unaffected 7.3 through * |
CWE
No CWE identifiers supplied.