CVE-2026-80577 drm/panthor: skip zero-sized firmware sections
A NULL pointer dereference in the Linux kernel Panthor GPU driver allows local attackers to cause a system crash by triggering specific firmware reload paths.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-80577?
CVE-2026-80577 is a vulnerability in Linux, published on 26 Aug 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/panthor: skip zero-sized firmware sections
panthor_fw_load_section_entry() skips BO creation when the firmware section VA range is empty. If such a section is added to the firmware section list, section->mem is left as NULL.
Later reload and unplug paths iterate over all firmware sections and dereference section->mem, which can lead to a NULL pointer dereference.
Zero-sized firmware sections are valid, so accept them as no-op entries but skip adding them to the section list.
Which versions are affected by CVE-2026-80577?
How do I fix CVE-2026-80577?
Apply the vendor's patch.
Is CVE-2026-80577 being exploited?
There is no known exploitation of CVE-2026-80577 in the wild and no public exploit code.
Sources
Also known as BELL-CVE-2026-80577, DEBIAN-CVE-2026-80577, UBUNTU-CVE-2026-80577.