Imagination Graphics DDK up to 26.1 RTM1 Firmware Validation toctou

Summaryinfo

A vulnerability, which was classified as very critical, was found in Imagination Graphics DDK up to 1.18 RTM2/23.2 RTM2/24.2 RTM2/25.3 RTM/26.1 RTM1. This affects an unknown function of the component Firmware Validation. Executing a manipulation can lead to toctou. This vulnerability appears as CVE-2026-45203. The attack may be performed from remote. There is no available exploit.

Detailsinfo

A vulnerability was found in Imagination Graphics DDK up to 1.18 RTM2/23.2 RTM2/24.2 RTM2/25.3 RTM/26.1 RTM1. It has been declared as very critical. This vulnerability affects some unknown functionality of the component Firmware Validation. The manipulation with an unknown input leads to a toctou vulnerability. The CWE definition for the vulnerability is CWE-367. The product checks the state of a resource before using that resource, but the resource's state can change between the check and the use in a way that invalidates the results of the check. This can cause the product to perform invalid actions when the resource is in an unexpected state. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

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.

The advisory is available at imaginationtech.com. This vulnerability was named CVE-2026-45203 since 05/11/2026. The exploitation appears to be easy. The attack can be initiated remotely. Additional levels of successful authentication are necessary for exploitation. The technical details are unknown and an exploit is not available. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 07/10/2026).

Upgrading to version 26.1 RTM2 eliminates this vulnerability.

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Productinfo

Vendor

• Imagination

Name

• Graphics DDK

Version

• 1.18 RTM2
• 23.2 RTM2
• 24.2 RTM2
• 25.3 RTM
• 26.1 RTM1

CPE 2.3info

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CPE 2.2info

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