kernel: drm: Set old handle to NULL before prime swap in change_handle

A flaw was found in the Linux kernel. A race condition in the Direct Rendering Manager DRM subsystem's changehandle function could allow a local attacker to trigger a use-after-free vulnerability. This occurs when a concurrent gemclose operation removes one handle while another remains dangling...

CVE-2026-46215

In the Linux kernel, the following vulnerability has been resolved: drm: Set old handle to NULL before prime swap in changehandle There was a potential race condition in changehandle. The ioctl briefly had a single object with two idr entries; a concurrent gemclose could delete the object and...

CVE-2026-46215 drm: Set old handle to NULL before prime swap in change_handle

In the Linux kernel, the following vulnerability has been resolved: drm: Set old handle to NULL before prime swap in changehandle There was a potential race condition in changehandle. The ioctl briefly had a single object with two idr entries; a concurrent gemclose could delete the object and...

CVE-2026-46215

The CVE concerns a race condition in the Linux kernel’s DRM change_handle path. A concurrent gem_close could remove one handle while another remained dangling, enabling a use-after-free. The fix uses the same sequence as gem_close: first replace the old handle with NULL via idr_replace, then, if ...