CVE-2021-47489 drm/amdgpu: Fix even more out of bound writes from debugfs

High 7.8 Published 22 May 2024 Updated 11 May 2026

Out-of-bounds writes in the amdgpu debugfs interface allow attackers to corrupt memory, potentially leading to code execution or privilege escalation.

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-2021-47489?

CVE-2021-47489 is a high-severity memory corruption vulnerability in Debian Debian Linux, published on 22 May 2024. 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/amdgpu: Fix even more out of bound writes from debugfs

CVE-2021-42327 was fixed by:

commit f23750b5b3d98653b31d4469592935ef6364ad67 Author: Thelford Williams <[email protected]> Date: Wed Oct 13 16:04:13 2021 -0400

drm/amdgpu: fix out of bounds write

but amdgpu_dm_debugfs.c contains more of the same issue so fix the remaining ones.

v2: * Add missing fix in dp_max_bpc_write (Harry Wentland)

Weakness: CWE-787

Which versions are affected by CVE-2021-47489?

It affects 2 products.

Products include Debian Debian Linux, Linux kernel.

How do I fix CVE-2021-47489?

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-2021-47489 being exploited?

There is no known exploitation of CVE-2021-47489 in the wild and no public exploit code.

All Debian Debian Linux vulnerabilities

Sources

Also known as DEBIAN-CVE-2021-47489, GHSA-843h-74ff-22vf, UBUNTU-CVE-2021-47489.