CVE-2026-45201: GPU DDK - Incorrect page size validation in PhysmemNewRamBackedPMR could lead to OOB read and/or write of arbitrary physical memory
Software installed and run as a non-privileged user may conduct improper GPU system calls to pass invalid log2 page size when allocating physical pages leading to OOB read and/or write due to improper validation of the said value.
Such crafted log2 page size could lead to 4K pages being treated as higher order pages and allowing read and/or write access to the memory beyond 4K threshold.
Affected Software
Event History
Frequently Asked Questions
Who can exploit this issue?
A non-privileged local user can exploit it through improper GPU system calls. The issue requires software to be installed and run on the affected system; no remote attack path is described.
What does exploitation require?
An attacker needs to submit GPU system calls that provide an invalid log2 page-size value while allocating physical pages. The crafted value can cause 4K pages to be handled as higher-order pages.
What is the potential impact?
Successful exploitation can result in out-of-bounds reads or writes of arbitrary physical memory beyond the 4K page boundary.