CVE-2026-93178 drm/amdgpu/pm/powerplay: bounds-check voltage index in SMU7 lookup
Missing bounds checks in the AMD GPU powerplay driver allow out-of-bounds reads from voltage lookup tables, potentially causing information disclosure or system crashes.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-93178?
CVE-2026-93178 is a high-severity memory corruption vulnerability in Linux, published on 17 Sep 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
In the Linux kernel, the following vulnerability has been resolved:
drm/amdgpu/pm/powerplay: bounds-check voltage index in SMU7 lookup
vddInd and vddcInd fields from VBIOS-parsed tables are used to index into voltage lookup tables without a bounds check. Return -EINVAL when any index is out of range.
Which versions are affected by CVE-2026-93178?
How do I fix CVE-2026-93178?
Apply the vendor's patch.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-93178 being exploited?
There is no known exploitation of CVE-2026-93178 in the wild and no public exploit code.
Sources
Also known as AZL-102029, BELL-CVE-2026-93178, DEBIAN-CVE-2026-93178, GHSA-fw9r-626q-5x54, UBUNTU-CVE-2026-93178.