Bug 2468214 (CVE-2026-43369)

Summary: CVE-2026-43369 kernel: drm/amd: Fix NULL pointer dereference in device cleanup
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
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Version: unspecifiedCC: rhel-process-autobot, watson-tool-maintainers
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in the Linux kernel's `drm/amd` graphics driver. When a GPU initialization fails due to an unsupported hardware block, certain IP blocks may have a null version pointer. During the device cleanup process, the `amdgpu_device_set_pg_state` and `amdgpu_device_set_cg_state` functions attempt to access these null pointers without proper checks. This can lead to a kernel null pointer dereference, potentially causing a system crash and resulting in a denial of service.
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Description OSIDB Bzimport 2026-05-08 15:05:09 UTC 
In the Linux kernel, the following vulnerability has been resolved:

drm/amd: Fix NULL pointer dereference in device cleanup

When GPU initialization fails due to an unsupported HW block
IP blocks may have a NULL version pointer. During cleanup in
amdgpu_device_fini_hw, the code calls amdgpu_device_set_pg_state and
amdgpu_device_set_cg_state which iterate over all IP blocks and access
adev->ip_blocks[i].version without NULL checks, leading to a kernel
NULL pointer dereference.

Add NULL checks for adev->ip_blocks[i].version in both
amdgpu_device_set_cg_state and amdgpu_device_set_pg_state to prevent
dereferencing NULL pointers during GPU teardown when initialization has
failed.

(cherry picked from commit b7ac77468cda92eecae560b05f62f997a12fe2f2)
Comment 1 Keith Grant 2026-05-08 20:53:42 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026050829-CVE-2026-43369-60b9@gregkh/T