CVE-2026-68445

A flaw was found in the Linux kernel's drm/vc4 component. This vulnerability allows a local user to bypass security validation for shader code. By manipulating memory permissions, an attacker could modify shader instructions after they have been deemed safe, potentially leading to unauthorized code execution.

This issue affects Raspberry Pi and other systems using the vc4 DRM driver. Validated shader buffer objects reject writable mmap but leave VM_MAYWRITE set, allowing mprotect() to make shader code writable after GPU validation. Systems without vc4 hardware are not affected.

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.