# CVE-2026-45203: Imagination Technologies Graphics DDK TOCTOU in GPU Firmware command handling

Source: https://junglewise.ai/threats/cve-2026-45203-imagination-technologies-graphics-ddk-toctou-in-gpu-firmware  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-07-10. Updated: 2026-07-10  
License: CC BY 4.0 with a link back

CVE-2026-45203 · Severity: info · CVSS 0 · Published 2026-07-10

A vulnerability in the Imagination Technologies Graphics DDK (Driver Development Kit) allows malicious software running within a virtual machine to bypass memory protections. By exploiting a timing flaw in how the GPU firmware validates commands, an attacker can force the system to write data to unauthorized memory locations. This could lead to a compromise of the host kernel, potentially allowing an attacker to escape a virtual machine or gain elevated control over the entire system.

Technologies: [Imagination Technologies Graphics DDK](https://junglewise.ai/threats/technologies/graphics-ddk). Vendors: [Imagination Technologies](https://junglewise.ai/threats/vendors/imagination-technologies).

## Quick answers

**Is CVE-2026-45203 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-45203 being exploited in the wild.

**How severe is CVE-2026-45203?** Informational severity, with a CVSS score of 0, published 10 July 2026.

**Which products and versions are affected?** Imagination Technologies Graphics DDK 1.18 RTM2, 23.2 RTM2, 24.2 RTM2, 25.1 RTM2 to 25.3 RTM, 26.1 RTM1.

**Is there a fix for CVE-2026-45203?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-45203 attacked?** It is attacked with local access, in a software library.

**Am I affected by CVE-2026-45203?** Check whether you run Imagination Technologies Graphics DDK at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

A Time-of-Check Time-of-Use (TOCTOU) race condition exists in the Imagination Technologies Graphics DDK. Kernel software running within a guest VM can post commands to the GPU firmware; a malicious driver can modify command values in memory after the firmware has validated them but before they are executed. This allows the attacker to trigger memory writes outside the permitted range of the host kernel. The vulnerability affects multiple versions of the Graphics DDK on Linux and Android platforms and is addressed in version 26.1 RTM2.

## Affected products

- Imagination Technologies Graphics DDK 1.18 RTM2, 23.2 RTM2, 24.2 RTM2, 25.1 RTM2 to 25.3 RTM, 26.1 RTM1

## Timeline

- 2026-07-10: disclosed
- 2026-07-10: advisory

## References

- [https://www.imaginationtech.com/gpu-driver-vulnerabilities/](https://www.imaginationtech.com/gpu-driver-vulnerabilities/)

## Related threats

- [Imagination Technologies Graphics DDK integer overflow in PMR offset calculation](https://junglewise.ai/threats/cve-2026-16280-imagination-technologies-graphics-ddk-integer-overflow-in-pmr)
- [Imagination Technologies Graphics DDK out-of-bounds write in GPU Firmware](https://junglewise.ai/threats/cve-2026-49745-imagination-technologies-graphics-ddk-out-of-bounds-write-in-gpu)
- [Imagination Technologies Graphics DDK out-of-bounds write in GPU Firmware](https://junglewise.ai/threats/cve-2026-49744-imagination-technologies-graphics-ddk-out-of-bounds-write-in-gpu)
- [Imagination Technologies Graphics DDK use after free in kernel synchronization](https://junglewise.ai/threats/cve-2026-49743-imagination-technologies-graphics-ddk-use-after-free-in-kernel)
- [Imagination Technologies Graphics DDK use-after-free in MMU mapping](https://junglewise.ai/threats/cve-2026-7639-imagination-technologies-graphics-ddk-use-after-free-in-mmu)