Vulnerability-Lookup

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)

Show details on NVD website

JSON

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FKIE_CVE-2026-21732

Vulnerability from fkie_nvd - Published: 2026-03-20 23:16 - Updated: 2026-03-23 15:16

Severity ?

9.6 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

Summary

References

	URL	Tags
	367425dc-4d06-4041-9650-c2dc6aaa27ce	https://www.imaginationtech.com/gpu-driver-vulnerabilities/

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "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."
    },
    {
      "lang": "es",
      "value": "Una p\u00e1gina web que contiene c\u00f3digo de sombreador de GPU inusual se carga en el proceso del compilador de GPU y puede desencadenar un fallo por escritura fuera de l\u00edmites en la biblioteca del compilador de sombreadores de GPU. En ciertas plataformas, cuando el proceso del compilador tiene privilegios de sistema, esto podr\u00eda permitir explotaciones adicionales en el dispositivo.\n\nUn caso l\u00edmite que utiliza un valor muy grande en sentencias switch en el c\u00f3digo de sombreador de GPU puede causar un fallo de segmentaci\u00f3n en el compilador de sombreadores de GPU debido a un acceso de escritura fuera de l\u00edmites."
    }
  ],
  "id": "CVE-2026-21732",
  "lastModified": "2026-03-23T15:16:31.653",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "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"
        },
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        "impactScore": 6.0,
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "type": "Secondary"
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  "published": "2026-03-20T23:16:42.480",
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}

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

Show details on source website

JSON

To clipboard

{
  "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"
    }
  ]
}

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

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

FKIE_CVE-2026-21732

GHSA-2MC2-45RP-R4W4

Tags

Sightings

Nomenclature