TI-2026-17504 Aliases CVE-2026-21732 GHSA-2mc2-45rp-r4w4

GPU DDK - libusc OOB write at ConvertSwitchToArrayLookupBP during WebGPU shader compilation

MEDIUM 43CWE-823Published 2026-03-20 · Updated 2026-03-23

Key facts

Attack vector: Network
Privileges required: None
User interaction: Required
Attack complexity: Low
Impact type: Code execution
Confidentiality · integrity · availability: High · High · High
Fix status: Fixed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-787 and the CVSS impact.

Summary

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 large value in switch statements in GPU shader code can cause a segmentation fault in the GPU shader compiler due to an out-of-bounds write access.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00306 23rd percentileScored 2026-11-07

Fix Fixed Graphics DDK (Imagination Technologies): 1.17 RTM, 1.18 RTM, 25.2 RTM

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Imagination Technologies	Graphics DDK	23.2 RTM; 24.1 RTM – 25.1 RTM	1.17 RTM, 1.18 RTM, 25.2 RTM	Patch available	CNA

Graphics DDK VendorImagination Technologies Affected 23.2 RTM; 24.1 RTM – 25.1 RTM Fixed in 1.17 RTM, 1.18 RTM, 25.2 RTM Patch available CNA

CPE configurations NVD · 4

CPE	Versions	Role	Vendor
cpe:2.3:a:imaginationtech:ddk::::::::	24.1 – 25.1	Vulnerable	Imagination Technologies
cpe:2.3:a:imaginationtech:ddk:1.17:::::::*	1.17	Vulnerable	Imagination Technologies
cpe:2.3:a:imaginationtech:ddk:1.18:::::::*	1.18	Vulnerable	Imagination Technologies
cpe:2.3:a:imaginationtech:ddk:23.2:::::::*	23.2	Vulnerable	Imagination Technologies

cpe:2.3:a:imaginationtech:ddk:*:*:*:*:*:*:*:* Versions 24.1 – 25.1 Vulnerable ·Imagination Technologies
cpe:2.3:a:imaginationtech:ddk:1.17:*:*:*:*:*:*:* Versions 1.17 Vulnerable ·Imagination Technologies
cpe:2.3:a:imaginationtech:ddk:1.18:*:*:*:*:*:*:* Versions 1.18 Vulnerable ·Imagination Technologies
cpe:2.3:a:imaginationtech:ddk:23.2:*:*:*:*:*:*:* Versions 23.2 Vulnerable ·Imagination Technologies

Remediation

Fix · CNA Graphics DDK (Imagination Technologies) Fixed in 1.17 RTM, 1.18 RTM, 25.2 RTM

Timeline

2026-10-02 Threatist record created from CVE-2026-21732
2026-10-03 Alias added: GHSA-2mc2-45rp-r4w4

References

Advisory 1

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

TI-2023-04574 GPU kernel implementations susceptible to memory leak CVSS 3.1MEDIUM 6.5
TI-2026-13612 GPU DDK - Integer overflow in _PMRLogicalOffsetToPhysicalOffset CVSS 3.1CRITICAL 9.8
TI-2025-12749 GPU DDK - libusc UAF via WebGPU shaders at MergeConsecutiveBarriersBP CVSS 3.1CRITICAL 9.8
TI-2025-18845 GPU DDK - GPU Register value contents leaked from secure workloads to non-secure world CVSS 3.1CRITICAL 9.1
TI-2026-17506 GPU DDK - libusc OOB write at TreeRemove during WebGPU shader compilation CVSS 3.1HIGH 7.7
TI-2025-36180 GPU DDK - Reservation::psMappedPMR can change while used by a freelist -> UAF CVSS 3.1HIGH 8.8

See all 34 →

Sources

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