Vulnerability-Lookup

GHSA-2MC2-45RP-R4W4

Vulnerability from github – Published: 2026-03-21 00:31 – Updated: 2026-03-23 15:30

Details

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.

Severity

9.6 (Critical)


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

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{
  "affected": [],
  "aliases": [
    "CVE-2026-21732"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-787",
      "CWE-823"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-03-20T23:16:42Z",
    "severity": "CRITICAL"
  },
  "details": "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.\n\n\n\nAn 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.",
  "id": "GHSA-2mc2-45rp-r4w4",
  "modified": "2026-03-23T15:30:33Z",
  "published": "2026-03-21T00:31:42Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-21732"
    },
    {
      "type": "WEB",
      "url": "https://www.imaginationtech.com/gpu-driver-vulnerabilities"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2026-21732 (GCVE-0-2026-21732)

Vulnerability from cvelistv5 – Published: 2026-03-20 22:48 – Updated: 2026-03-23 15:03

Title

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

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.

Severity

9.6 (Critical)


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

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-03-23 15:03 UTC

CWE

CWE-823 - Use of Out-of-range Pointer Offset (4.16)

Assigner

imaginationtech mitre root Scorecard

References

1 reference

URL	Tags
https://www.imaginationtech.com/gpu-driver-vulner…

Impacted products

1 product

Vendor	Product	Version
Imagination Technologies	Graphics DDK	Unaffected: 1.17 RTM (custom) Unaffected: 1.18 RTM (custom) Affected: 23.2 RTM (custom) Affected: 24.1 RTM , ≤ 25.1 RTM (custom) Unaffected: 25.2 RTM (custom)

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JSON

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      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
              "availabilityImpact": "HIGH",
              "baseScore": 9.6,
              "baseSeverity": "CRITICAL",
              "confidentialityImpact": "HIGH",
              "integrityImpact": "HIGH",
              "privilegesRequired": "NONE",
              "scope": "CHANGED",
              "userInteraction": "REQUIRED",
              "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2026-21732",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-03-23T15:03:27.343812Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-03-23T15:03:50.302Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
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    "cna": {
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          "defaultStatus": "unknown",
          "platforms": [
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            "Android"
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          "vendor": "Imagination Technologies",
          "versions": [
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              "status": "unaffected",
              "version": "1.17 RTM",
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            },
            {
              "status": "unaffected",
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              "versionType": "custom"
            },
            {
              "status": "affected",
              "version": "23.2 RTM",
              "versionType": "custom"
            },
            {
              "lessThanOrEqual": "25.1 RTM",
              "status": "affected",
              "version": "24.1 RTM",
              "versionType": "custom"
            },
            {
              "status": "unaffected",
              "version": "25.2 RTM",
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            }
          ],
          "value": "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.\n\n\n\nAn 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."
        }
      ],
      "impacts": [
        {
          "capecId": "CAPEC-113",
          "descriptions": [
            {
              "lang": "en",
              "value": "CAPEC-113: Interface Manipulation (Version 3.9)"
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          ]
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      ],
      "problemTypes": [
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        "orgId": "367425dc-4d06-4041-9650-c2dc6aaa27ce",
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      "references": [
        {
          "url": "https://www.imaginationtech.com/gpu-driver-vulnerabilities/"
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      },
      "title": "GPU DDK - libusc OOB write at ConvertSwitchToArrayLookupBP during WebGPU shader compilation",
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    "assignerShortName": "imaginationtech",
    "cveId": "CVE-2026-21732",
    "datePublished": "2026-03-20T22:48:42.695Z",
    "dateReserved": "2026-01-05T11:57:27.257Z",
    "dateUpdated": "2026-03-23T15:03:50.302Z",
    "state": "PUBLISHED"
  },
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Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

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GHSA-2MC2-45RP-R4W4

CVE-2026-21732 (GCVE-0-2026-21732)

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