---
id: CVE-2026-18629
title: >-
  GPU DDK - libusc.so NPD due to integer overflow at ConvertSwitchToArrayLookup
  during WebGPU shader compilation
summary: >-
  A web page that contains unusual GPU shader code is loaded into the GPU
  compiler process and can lead memory allocation failure. If the allocation
  failure is not properly handled, the compiler may dereference a NULL pointer
  at a controll…
severity: none
cwe:
  - CWE-190
vendor: Imagination Technologies
product: Graphics DDK
affected:
  - graphics_ddk 23.2 RTM2
  - graphics_ddk 24.2 RTM2
  - graphics_ddk >= 25.1 RTM2 <= 25.3 RTM
  - graphics_ddk 26.1 RTM1
published: '2026-10-30'
updated: '2026-10-30'
sourceUpdated: '2026-10-30T02:00:30.719Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-18629'
references:
  - url: 'https://www.imaginationtech.com/gpu-driver-vulnerabilities/'
tags:
  - cve.org
epss: 0.0014
epssPercentile: 0.03307
ingestedAt: '2026-11-03T09:40:52.173Z'
---

## Overview

A web page that contains unusual GPU shader code is loaded into the GPU compiler process and can lead memory allocation failure. If the allocation failure is not properly handled, the compiler may dereference a NULL pointer at a controlled offset, resulting in a crash of the compiler process. On certain platforms, when the compiler process has system privileges this could lead to crashes or enable further exploits on the device.



The weakness results from performing arithmetic operations on values derived from the shader program without properly preventing integer overflow. The overflow can cause incorrect memory size calculations, leading to memory allocation failures and subsequent invalid program behaviour. Integer overflow can produce unexpected values that affect memory allocation and other security-relevant operations.

## Affected

- `graphics_ddk 23.2 RTM2`
- `graphics_ddk 24.2 RTM2`
- `graphics_ddk >= 25.1 RTM2 <= 25.3 RTM`
- `graphics_ddk 26.1 RTM1`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.