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Vulnerability record · CVE-2026-21733 · published 17 April 2026

CVE-2026-21733: Imaginationtech ddk improper input validation vulnerability

Imaginationtech · Ddk

Software installed and run as a non-privileged user may conduct improper GPU system calls to gain write permission to read-only wrapped user-mode memory and files. This is caused by improper handling of GPU memory reservation protections.

7.3 CVSS 3.1 High EPSS 0.10% · top 99.3% CWE-280 · CWE-280CWE-20 · Improper input validation
7.3CVSS 3.1 base score
0.10%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
1References
12 Aug 2026Last modified by NVD

Description

Software installed and run as a non-privileged user may conduct improper GPU system calls to gain write permission to read-only wrapped user-mode memory and files. This is caused by improper handling of GPU memory reservation protections.

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://www.imaginationtech.com/gpu-driver-vulnerabilities/ Vendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2026-16280Imaginationtech ddk integer overflow vulnerabilityAn integer overflow when calculating physical offsets for sparse PMRs may result in 32-bit truncation of address computations for PMRs larger than 4 …EPSS 0.53%9.8CVE-2025-13952Imaginationtech ddk use after free vulnerabilityA web page that contains unusual GPU shader code is loaded from the Internet into the GPU compiler process triggers a write use-after-free crash in t…EPSS 0.46%9.6CVE-2026-21732Imaginationtech ddk out-of-bounds write vulnerabilityA web page that contains unusual GPU shader code is loaded into the GPU compiler process and can trigger a write out-of-bounds write crash in the GPU…EPSS 0.29%9.1CVE-2025-25176Imaginationtech ddk exposure of resource to wrong sphere vulnerabilityIntermediate register values of secure workloads can be exfiltrated in workloads scheduled from applications running in the non-secure environment of…EPSS 0.35%8.8CVE-2025-58411Imaginationtech ddk use after free vulnerabilitySoftware installed and run as a non-privileged user may conduct improper GPU system calls to cause mismanagement of resources reference counting crea…EPSS 0.17%8.2CVE-2025-0467Imaginationtech ddk vulnerabilityKernel software installed and running inside a Guest VM may exploit memory shared with the GPU Firmware to write data outside the Guest's virtualised…EPSS 0.18%8.1CVE-2026-22165Imaginationtech ddk use after free vulnerabilityA web page that contains unusual WebGPU content loaded into the GPU GLES render process and can trigger a write UAF crash in the GPU GLES user-space …EPSS 0.35%8.1CVE-2026-22166Imaginationtech ddk use after free vulnerabilityA web page that contains unusual WebGPU content loaded into the GPU GLES render process and can trigger write UAF crash in the GPU GLES user-space sh…EPSS 0.39%

Source: NIST National Vulnerability Database (record CVE-2026-21733), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.