CVE-2024-46775

What it actually does

Unchecked function return values in drm/amd/display allow data to be used in subsequent kernel operations without validation, creating improper input validation conditions.

Why it matters to the business

May cause graphics instability or crashes on Linux systems using AMD displays, leading to operational downtime; low EPSS indicates limited active exploitation risk but kernel exposure warrants urgency for patching.

How an attack unfolds

An attacker with local access triggers display code paths where return values are not checked, allowing invalid data to propagate and potentially enabling further abuse in affected Linux kernel versions.

How to fix it

Upgrade the Linux kernel to include commit 5639a3048c7079803256374204ad55ec52cd0b49. For the listed Go jwt-go package, update to version 4.0.0-preview1.

How to confirm the fix worked

Confirm kernel source or binary contains the return-value validation changes from commit 5639a3048c7079803256374204ad55ec52cd0b49; re-run static analysis tools such as Coverity on the drm/amd/display code paths.

Typical attack path

1. Identify systems running vulnerable Linux kernel versions prior to the fix commit
2. Trigger AMD display driver operations via user-space graphics APIs or syscalls
3. Force error conditions that return unchecked values to subsequent functions
4. Leverage resulting invalid data state for stability impact or further exploitation

How to detect it

Review kernel logs and dmesg for AMD display driver anomalies or unhandled return paths; no public exploitation artifacts tied to the listed threat actors are known for this specific issue.

What your security team should do

• Prioritize kernel updates on all AMD Linux systems within the next maintenance window
• Monitor EPSS trend and any new threat actor reports for this issue
• Apply defense-in-depth by restricting untrusted local access until patched