CVE-2026-45203 GPU DDK - rgxfw_hwperf_ufo() re-reads psCmdHeader->ui32CmdSize after initial check, TOCTOU
A time-of-check time-of-use race condition in the GPU firmware allows a malicious driver to trigger out-of-bounds memory writes, potentially leading to code execution or privilege escalation.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-45203?
CVE-2026-45203 is a high-severity vulnerability in Imagination Technologies Graphics DDK, published on 10 Jul 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Kernel software installed and running inside a Host VM may post improper commands to the GPU Firmware to trigger a memory write outside the permitted range of memory for the host kernel.
A TOCTOU bug existed where a malicious driver could modify values in memory after firmware validation but before use.
Weakness: CWE-367
Which versions are affected by CVE-2026-45203?
It affects 1 product.
Products include Imaginationtech Ddk.
How do I fix CVE-2026-45203?
Apply the vendor's patch.
Is CVE-2026-45203 being exploited?
There is no known exploitation of CVE-2026-45203 in the wild and no public exploit code.
Other vulnerabilities in Imagination Technologies Graphics DDK
- CVE-2026-16280 GPU DDK - Integer overflow in _PMRLogicalOffsetToPhysicalOffset
- CVE-2025-13952 GPU DDK - libusc UAF via WebGPU shaders at MergeConsecutiveBarriersBP
- CVE-2026-21732 GPU DDK - libusc OOB write at ConvertSwitchToArrayLookupBP during WebGPU shader compilation
- CVE-2025-25176 GPU DDK - GPU Register value contents leaked from secure workloads to non-secure world
- CVE-2025-58411 GPU DDK - Reservation::psMappedPMR can change while used by a freelist -> UAF
Sources
Also known as A-515478004, ASB-A-515478004, GHSA-vf2q-w6vq-3hq8.