Recursive Locking Vulnerability in AMD's amdgpu Driver

CVE-2026-80919

What is CVE-2026-80919?

A vulnerability in AMD’s amdgpu driver for the Linux kernel has been identified, which may lead to potential deadlock scenarios during the handling of IB dumps from hung jobs. Specifically, the issue arises when amdgpu_devcoredump_format() acquires a VM root PD's reservation and subsequently attempts to reserve backing objects (BO) for each instruction buffer (IB) without using a proper locking context. This creates a risk for recursive locking that could result in deadlocks. The implementation has been revised to utilize a single drm_exec ticket for handling the reservations, eliminating the possibility of deadlock and ensuring better error handling.

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