CVE-2024-46807

What it actually does

Missing validation of the tbo resource pointer in the AMD GPU driver allows a NULL pointer dereference, resulting in memory corruption or kernel instability.

Why it matters to the business

Linux systems with AMD GPUs face potential crashes or exploitation risks that could disrupt operations across desktops, servers, and embedded devices; widespread kernel usage amplifies exposure despite low EPSS.

How an attack unfolds

An attacker with local access crafts input to reach the unvalidated tbo resource code path in drm/amdgpu, triggering a NULL dereference that may cause denial of service or privilege escalation; referenced in zero-day campaigns by espionage and financially motivated actors targeting Linux kernel resource issues.

How to fix it

Upgrade the Linux kernel to a version containing commit e55e3904ffeaff81715256a711b1a61f4ad5258a; apply the corresponding stable release that adds the tbo resource pointer validation.

How to confirm the fix worked

Confirm the kernel source contains the pointer check before the tbo resource usage in amdgpu; test by exercising relevant DRM paths and verifying absence of NULL dereference faults.

Typical attack path

1. Gain local access to a system with an affected AMD GPU and vulnerable kernel
2. Trigger graphics or DRM subsystem operations that reach the amdgpu tbo handling code
3. Supply input causing the tbo resource pointer to be NULL
4. Execute the missing-check path leading to dereference and corruption

How to detect it

Review kernel logs and crash dumps for amdgpu tbo resource faults; correlate with threat actor activity around Linux kernel resource vulnerabilities.

What your security team should do

• Prioritize kernel updates on all AMD GPU hosts given the memory corruption family
• Monitor kernel logs for amdgpu-related oops or panics as interim detection
• Limit untrusted local access to graphics subsystems until patched