How severe is CVE-2026-21734?

CVE-2026-21734 has a CVSS 3.x base score of 7.7, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability high.

Is CVE-2026-21734 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (2nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-21734?

CVE-2026-21734 primarily affects Imaginationtech Ddk. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2026-21734?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2026-21734 published?

CVE-2026-21734 was published on 2026-06-26 and last updated on 2026-06-29.

CVE-2026-21734

CVE-2026-21734 is a high-severity vulnerability in Imaginationtech Ddk with a CVSS 3.x base score of 7.7. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-823.

Key facts

Severity: High (CVSS 3.x base score 7.7)
EPSS exploit prediction: 0% (2nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-823
Affected product: Imaginationtech Ddk
Published: 2026-06-26
Last modified: 2026-06-29

Description

A 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 shader compiler library. On certain platforms, when the compiler process has system privileges this could enable further exploits on the device. An edge case using a very small value in GPU shader code can cause a segmentation fault in the GPU shader compiler due to am out-of-bounds write.

Frequently asked questions

What is CVE-2026-21734?: A 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 shader compiler library. On certain platforms, when the compiler process has system privileges this could enable further exploits on the device. An edge case using a very small value in GPU shader code can cause a segmentation fault in the GPU shader compiler due to am out-of-bounds write.
How severe is CVE-2026-21734?: CVE-2026-21734 has a CVSS 3.x base score of 7.7, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability high.
Is CVE-2026-21734 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (2nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-21734?: CVE-2026-21734 primarily affects Imaginationtech Ddk. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2026-21734?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2026-21734 published?: CVE-2026-21734 was published on 2026-06-26 and last updated on 2026-06-29.

References

https://www.imaginationtech.com/gpu-driver-vulnerabilities/

Affected products (2)

cpe:2.3:a:imaginationtech:ddk:*:*:*:*:*:*:*:*
cpe:2.3:a:imaginationtech:ddk:25.3:rtm:*:*:*:*:*:*

More vulnerabilities in Imaginationtech Ddk

CVE-2025-13952 — Critical (CVSS 9.8): A web page that contains unusual GPU shader code is loaded from the Internet into the GPU compiler process triggers a…
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CVE-2025-25176 — Critical (CVSS 9.1): Intermediate register values of secure workloads can be exfiltrated in workloads scheduled from applications running in…
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CVE-2025-0467 — High (CVSS 8.2): Kernel software installed and running inside a Guest VM may exploit memory shared with the GPU Firmware to write data…
CVE-2026-22166 — High (CVSS 8.1): A web page that contains unusual WebGPU content loaded into the GPU GLES render process and can trigger write UAF crash…

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