CVE-2026-89447Medium· 4.4▾ SunlitIn 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 invo…
▾ Sunlit zone — Low / medium · no exploitation signal
impact 24.2 · likelihood 0 · exploitation 0
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Exploit-prediction probability, daily snapshots since Sep 12.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via NVD
0.2%
— → 4.4
none → medium
— → 4.4
none → medium
— → 4.4
none → medium
0.2% → 0.2%
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.
Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Field changes observed since this record was first indexed.
Connected by shared product, vendor, weakness, or advisory.
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