CVE-2024-46700

What it actually does

The flaw allows writing MES packets to the AMD GPU ring buffer without first verifying sufficient available space, resulting in a buffer overflow and potential memory corruption.

Why it matters to the business

Systems using AMD GPUs may experience kernel instability, crashes, or local privilege escalation, disrupting operations on affected Linux distributions until patched.

How an attack unfolds

An attacker with local access submits crafted workloads or commands that trigger repeated MES packet submissions faster than the ring buffer can drain, overflowing the buffer and corrupting adjacent kernel memory to achieve code execution or denial of service.

How to fix it

Upgrade the Linux kernel to version 6.10.9-1 or later on Debian 13 systems; apply the fix that adds explicit room-wait checks before MES packet writes.

How to confirm the fix worked

Verify the running kernel version is at least 6.10.9-1, review dmesg for MES-related warnings, and confirm the patch commit 34e087e8920e is present in the source.

Typical attack path

1. Gain local user access on a system with an AMD GPU
2. Trigger or submit GPU workloads that exercise the MES submission path
3. Rapidly issue commands to exhaust ring buffer space before the wait logic is applied
4. Exploit the resulting memory corruption for privilege escalation or crash

How to detect it

Search kernel logs for amdgpu MES ring buffer errors or overflows, monitor for unexpected process crashes involving the GPU driver, and review audit logs for unusual local GPU command submissions.

What your security team should do

• Prioritize kernel upgrades on all Debian 13 systems with AMD GPUs
• Monitor for kernel oops or panics involving amdgpu/mes after deployment
• Restrict unprivileged GPU access via device permissions where feasible until patched