CVE-2024-50282

What it actually does

Missing size check in amdgpu_debugfs_gprwave_read() permits buffer overflow when requested size exceeds 4K.

Why it matters to the business

Potential system crashes or code execution on Linux systems with AMD GPUs can cause operational downtime and security breaches; widespread Linux kernel use heightens exposure across environments.

How an attack unfolds

An attacker with local access opens the amdgpu GPR wave debugfs file and issues a read larger than 4K, overflowing the buffer to corrupt memory. Espionage and financially motivated actors targeting Linux kernel flaws may chain this with other issues for privilege escalation.

How to fix it

Apply the upstream fix from commit f5d873f5825b40d886d03bd2aede91d4cf002434; for flashplugin-nonfree on Ubuntu 14.04 LTS upgrade to version 11.2.202.554ubuntu0.14.04.1.

How to confirm the fix worked

Confirm patched kernel is running, then attempt reads larger than 4K on the affected debugfs entry to verify bounds enforcement.

Typical attack path

1. Obtain local user access on target system
2. Locate and open amdgpu debugfs GPR wave interface
3. Issue oversized read request exceeding 4K
4. Trigger buffer overflow to achieve code execution or denial of service

How to detect it

Review kernel logs and audit records for oversized reads or crashes involving amdgpu_debugfs_gprwave_read; correlate with threat actor patterns targeting Linux kernel out-of-bounds issues.

What your security team should do

• Prioritize kernel updates on all AMD GPU systems due to buffer overflow risk
• Restrict debugfs mounts and access to privileged users only
• Audit systems for unpatched amdgpu drivers within the next 30 days