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-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

CWE

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

Assigner

imaginationtech

References

URL

Tags

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

Impacted products

	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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  "containers": {
    "adp": [
      {
        "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"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unknown",
          "platforms": [
            "Linux",
            "Android"
          ],
          "product": "Graphics DDK",
          "vendor": "Imagination Technologies",
          "versions": [
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              "status": "unaffected",
              "version": "1.17 RTM",
              "versionType": "custom"
            },
            {
              "status": "unaffected",
              "version": "1.18 RTM",
              "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",
              "versionType": "custom"
            }
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        }
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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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      ],
      "problemTypes": [
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        "dateUpdated": "2026-03-20T22:48:42.695Z",
        "orgId": "367425dc-4d06-4041-9650-c2dc6aaa27ce",
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      },
      "references": [
        {
          "url": "https://www.imaginationtech.com/gpu-driver-vulnerabilities/"
        }
      ],
      "source": {
        "discovery": "UNKNOWN"
      },
      "title": "GPU DDK - libusc OOB write at ConvertSwitchToArrayLookupBP during WebGPU shader compilation",
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  "cveMetadata": {
    "assignerOrgId": "367425dc-4d06-4041-9650-c2dc6aaa27ce",
    "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"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date

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.

Detection rules are retrieved from Rulezet.

Action not permitted

GHSA-2MC2-45RP-R4W4

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

Tags

Sightings

Nomenclature