CVE-2025-38098

What it actually does

Incorrect assumption that a writeback connector is a physical amdgpu_dm_connector causes invalid pointer dereference during stream validation in the AMD display driver, leading to memory corruption or undefined behavior.

Why it matters to the business

Kernel instability or crashes on AMD GPU systems can interrupt workloads and require reboots; low EPSS and no KEV status indicate limited real-world exploitation risk, but the presence of related Linux kernel privilege-escalation campaigns increases the need for prompt patching across large fleets.

How an attack unfolds

An attacker with local access triggers the display code path that passes a drm_writeback_connector into create_validate_stream_for_sink, causing the driver to treat it as an amdgpu_dm_connector and dereference invalid memory; similar techniques appear in the listed Advanced Spyware Campaign and other kernel privilege-escalation CVEs.

How to fix it

Update the Linux kernel to commit b14e726d57f61085485f107a6203c50a09695abd or later; upgrade cadvisor-fips (Chainguard) to version 0.53.0-r1.

How to confirm the fix worked

Confirm the fixed commit appears in the kernel source tree or verify the running kernel contains the patch via version string checks and module symbols.

Typical attack path

1. Obtain local execution on a Linux system with AMD display hardware
2. Create or manipulate a writeback connector object
3. Invoke display stream validation that reaches the flawed code path
4. Trigger invalid dereference to corrupt memory or crash the kernel
5. Leverage corruption for privilege escalation or denial of service

How to detect it

Search kernel logs and crash dumps for entries referencing amdgpu_dm_connector, drm_writeback_connector, or create_validate_stream_for_sink around the time of unexpected reboots or display subsystem faults.

What your security team should do

• Apply the listed kernel and package updates within standard change windows given the 481 days since publication
• Prioritize systems with AMD GPUs that expose display or writeback connectors
• Monitor kernel logs for amdgpu display-related oops or warnings until patches are deployed