CVE-2026-98566 drm/imagination: clamp freelist reconstruction requests
A missing bounds check in the Imagination DRM driver allows an attacker to trigger memory corruption via crafted firmware reconstruction requests.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-98566?
CVE-2026-98566 is a vulnerability in Linux, published on 18 Oct 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
In the Linux kernel, the following vulnerability has been resolved:
drm/imagination: clamp freelist reconstruction requests
The firmware reconstruction count controls accesses to the request's fixed freelist ID array and the copy into the fixed response array. Neither access currently bounds the count to those protocol arrays.
Clamp the count to the request capacity, which is shared by the response layout, and use that count consistently for reconstruction and response publication. Keep the firmware recovery exchange instead of dropping an oversized request without a response, as discussed with the firmware maintainer.
The issue was found by our static-analysis tool.
Which versions are affected by CVE-2026-98566?
How do I fix CVE-2026-98566?
Apply the vendor's patch.
Is CVE-2026-98566 being exploited?
There is no known exploitation of CVE-2026-98566 in the wild and no public exploit code.
Sources
Also known as BELL-CVE-2026-98566, DEBIAN-CVE-2026-98566, GHSA-8m42-mvgx-m6jp, UBUNTU-CVE-2026-98566.