CVE-2026-80747 drm/amdkfd: Add bounds check for CRAT subtype length
A missing bounds check in the Linux kernel's AMD KFD driver allows out-of-bounds reads via malformed CRAT tables, potentially causing information disclosure or crashes.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-80747?
CVE-2026-80747 is a high-severity memory corruption vulnerability in Linux, published on 3 Sep 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/amdkfd: Add bounds check for CRAT subtype length
The CRAT parser validates that the subtype header fits within the image, but does not verify that the advertised subtype length fits. A malformed CRAT table with an oversized length field causes out-of-bounds reads when kfd_parse_subtype() casts the header to specific subtype structures.
Add validation that sub_type_hdr + length does not exceed the image boundary before parsing the subtype contents.
(cherry picked from commit 48e1d1e6e8798aef0312e68d8e586021b5b3cf4d)
Which versions are affected by CVE-2026-80747?
How do I fix CVE-2026-80747?
Apply the vendor's patch.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-80747 being exploited?
There is no known exploitation of CVE-2026-80747 in the wild and no public exploit code.
Sources
Also known as AZL-99041, BELL-CVE-2026-80747, DEBIAN-CVE-2026-80747, GHSA-9jrx-pr9x-qp88, UBUNTU-CVE-2026-80747.