CVE-2026-21732Network attack vector

GPU compiler crash via oversized switch value

Published Mar 20, 2026 · Updated Mar 20, 2026

Out-of-bounds write in Graphics DDK 23.2 RTM and 24.1 RTM through 25.1 RTM allows remote attackers to crash the GPU compiler. ConvertSwitchToArrayLookupBP mishandles a very large switch-statement value while compiling WebGPU shader code and writes beyond the target buffer. A victim must load a crafted web page; the immediate result is a segmentation-fault crash, while system-privileged compiler deployments expose the device to follow-on exploitation.

CVSS severity9.6
Critical
EPSS probability0.29%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds write in Graphics DDK 23.2 RTM and 24.1 RTM through 25.1 RTM allows remote attackers to crash the GPU compiler. ConvertSwitchToArrayLookupBP mishandles a very large switch-statement value while compiling WebGPU shader code and writes beyond the target buffer. A victim must load a crafted web page; the immediate result is a segmentation-fault crash, while system-privileged compiler deployments expose the device to follow-on exploitation.

The record

CVE
CVE-2026-21732
Published
Mar 20, 2026
Updated
Mar 20, 2026
Vendor
Imagination Technologies
Product
Graphics DDK
Classifications
CWE-787, CWE-823, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 20, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 20, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=23.2 RTM
  2. Affected versionversion=24.1 RTM <=25.1 RTM

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Imagination Technologies · Graphics DDKversion=23.2 RTM; version=24.1 RTM <=25.1 RTM

Published CVSS scores

9.6CISA ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-787Out-of-bounds Write
CWE-823Use of Out-of-range Pointer Offset
T1203Exploitation for Client Execution

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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