NULL Pointer Dereference in AMD64 AGP Driver for Linux Kernel

CVE-2026-53325

What is CVE-2026-53325?

A vulnerability in the AMD64 AGP driver for the Linux kernel can lead to a NULL pointer dereference when running in a virtualized environment without a physical AMD northbridge. The issue arises from improper error handling in the agp_amd64_probe() function, which fails to correctly detect hardware absence, allowing the driver to proceed with initialization despite the missing component. This oversight ultimately results in a General Protection Fault when accessing a NULL pointer, highlighting the critical need for precise error propagation to ensure system stability.

References