CVE-2024-46720

What it actually does

Null pointer dereference in the amdgpu DRM driver when the hive pointer is used without a prior null check, leading to a kernel crash or memory corruption on affected systems.

Why it matters to the business

Potential system instability or denial of service on Linux systems using AMD GPUs, increasing operational downtime and requiring urgent patching across large fleets; low exploitability reduces immediate ransomware risk but still demands attention due to kernel exposure.

How an attack unfolds

An attacker with local access triggers the vulnerable code path in the amdgpu driver, passing a null hive pointer that is dereferenced before validation, causing a kernel panic; no remote or unauthenticated exploitation is indicated.

How to fix it

Update the Linux kernel to the fixed commit 1b73ea3d97cc23f9b16d10021782b48397d2b517 or later stable releases containing the null check for the hive pointer; apply vendor-specific kernel updates for affected distributions.

How to confirm the fix worked

Verify the presence of the null check for the hive pointer in the amdgpu driver source after applying the update; confirm the running kernel version includes commit 1b73ea3d97cc23f9b16d10021782b48397d2b517 and test GPU initialization under load.

Typical attack path

1. Obtain local access on a Linux system with AMD GPU hardware
2. Trigger the amdgpu code path that references the hive pointer without checking for null
3. Cause kernel dereference leading to crash or corruption

How to detect it

Inspect kernel logs for amdgpu-related null pointer dereference oops messages; review system crash dumps for hive pointer handling in the DRM subsystem.

What your security team should do

• Prioritize kernel updates on all AMD GPU-equipped Linux systems within standard patch windows
• Monitor for kernel oops or panic logs related to amdgpu
• Review downstream dependent packages for any additional fixes if ecosystem rebuilds are needed