CVE-2026-98779 drm/amdgpu: fix ACP MFD device leak on init failure

Not scored Published 18 Oct 2026 Updated 21 Oct 2026

A memory leak in the AMD GPU driver's ACP initialization failure path can lead to resource exhaustion and denial of service.

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-2026-98779?

CVE-2026-98779 is a memory corruption 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/amdgpu: fix ACP MFD device leak on init failure

acp_hw_init() registers ACP child devices with mfd_add_devices() before attaching them to the ACP power domain and initializing the hardware.

If attaching a child to the power domain fails, or if the ACP reset or clock enable operation times out, the failure path frees only the source cell, resource, and platform-data allocations. The child platform devices already registered by mfd_add_devices() remain registered and are never released.

Remove the children from the power domain and unregister the MFD devices on failures that occur after mfd_add_devices() succeeds. Keep mfd_add_devices() failures on the existing cleanup path since the MFD core already rolls back partially registered children itself.

The issue was identified by a static analysis tool I developed and confirmed by manual review.

(cherry picked from commit 63da68d6a2279ec945581c990c5a59a5ae8b5560)

Which versions are affected by CVE-2026-98779?

How do I fix CVE-2026-98779?

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-2026-98779 being exploited?

There is no known exploitation of CVE-2026-98779 in the wild and no public exploit code.

Sources

Also known as AZL-109334, BELL-CVE-2026-98779, DEBIAN-CVE-2026-98779, GHSA-7q7p-f6vv-qrwf, UBUNTU-CVE-2026-98779.