Vulnerability-Lookup

GHSA-Q4G7-PM99-9F7G

Vulnerability from github – Published: 2026-07-10 21:32 – Updated: 2026-07-10 21:32

Details

Triggering failure path in the MMU mapping logic by a malicious code could lead to incomplete cleanup of an internal driver state, allowing for future unauthorized access to the contents of the physical memory.

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{
  "affected": [],
  "aliases": [
    "CVE-2026-7639"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-459"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-07-10T21:17:00Z",
    "severity": null
  },
  "details": "Software installed and run as a non-privileged user may conduct a sequence of improper GPU system calls causing use after free, which helps in facilitating unprivileged memory access from a shader code.\n\n\n\nTriggering failure path in the MMU mapping logic by a malicious code could lead to incomplete cleanup of an internal driver state, allowing for future unauthorized access to the contents of the physical memory.",
  "id": "GHSA-q4g7-pm99-9f7g",
  "modified": "2026-07-10T21:32:34Z",
  "published": "2026-07-10T21:32:34Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-7639"
    },
    {
      "type": "WEB",
      "url": "https://www.imaginationtech.com/gpu-driver-vulnerabilities"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2026-7639 (GCVE-0-2026-7639)

Vulnerability from cvelistv5 – Published: 2026-07-10 20:50 – Updated: 2026-07-10 20:50

Title

GPU DDK - Page UAF read in PMMETA_PROTECT heap memory

Summary

Software installed and run as a non-privileged user may conduct a sequence of improper GPU system calls causing use after free, which helps in facilitating unprivileged memory access from a shader code. Triggering failure path in the MMU mapping logic by a malicious code could lead to incomplete cleanup of an internal driver state, allowing for future unauthorized access to the contents of the physical memory.

Severity

No CVSS data available.

CWE

CWE-459 - Incomplete Cleanup

Assigner

imaginationtech

References

1 reference

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

Impacted products

1 product

Vendor	Product	Version
Imagination Technologies	Graphics DDK	Affected: 1.18 RTM2 (custom) Affected: 23.2 RTM2 (custom) Affected: 24.2 RTM2 (custom) Affected: 25.1 RTM2 , ≤ 25.3 RTM (custom) Affected: 26.1 RTM1 (custom) Unaffected: 26.1 RTM2 (custom)

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JSON

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unknown",
          "platforms": [
            "Linux",
            "Android"
          ],
          "product": "Graphics DDK",
          "vendor": "Imagination Technologies",
          "versions": [
            {
              "status": "affected",
              "version": "1.18 RTM2",
              "versionType": "custom"
            },
            {
              "status": "affected",
              "version": "23.2 RTM2",
              "versionType": "custom"
            },
            {
              "status": "affected",
              "version": "24.2 RTM2",
              "versionType": "custom"
            },
            {
              "lessThanOrEqual": "25.3 RTM",
              "status": "affected",
              "version": "25.1 RTM2",
              "versionType": "custom"
            },
            {
              "status": "affected",
              "version": "26.1 RTM1",
              "versionType": "custom"
            },
            {
              "status": "unaffected",
              "version": "26.1 RTM2",
              "versionType": "custom"
            }
          ]
        }
      ],
      "descriptions": [
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          "lang": "en",
          "supportingMedia": [
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              "type": "text/html",
              "value": "\u003cp\u003eSoftware installed and run as a non-privileged user may conduct a sequence of improper GPU system calls causing use after free, which helps in facilitating unprivileged memory access from a shader code.\u003c/p\u003e\u003cp\u003eTriggering failure path in the MMU mapping logic by a malicious code could lead to incomplete cleanup of an internal driver state, allowing for future unauthorized access to the contents of the physical memory.\u003c/p\u003e"
            }
          ],
          "value": "Software installed and run as a non-privileged user may conduct a sequence of improper GPU system calls causing use after free, which helps in facilitating unprivileged memory access from a shader code.\n\n\n\nTriggering failure path in the MMU mapping logic by a malicious code could lead to incomplete cleanup of an internal driver state, allowing for future unauthorized access to the contents of the physical memory."
        }
      ],
      "impacts": [
        {
          "capecId": "CAPEC-554",
          "descriptions": [
            {
              "lang": "en",
              "value": "CAPEC-554: Functionality Bypass"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-459",
              "description": "CWE-459: Incomplete Cleanup",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-07-10T20:50:27.730Z",
        "orgId": "367425dc-4d06-4041-9650-c2dc6aaa27ce",
        "shortName": "imaginationtech"
      },
      "references": [
        {
          "url": "https://www.imaginationtech.com/gpu-driver-vulnerabilities/"
        }
      ],
      "source": {
        "discovery": "UNKNOWN"
      },
      "title": "GPU DDK - Page UAF read in PMMETA_PROTECT heap memory",
      "x_generator": {
        "engine": "Vulnogram 0.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "367425dc-4d06-4041-9650-c2dc6aaa27ce",
    "assignerShortName": "imaginationtech",
    "cveId": "CVE-2026-7639",
    "datePublished": "2026-07-10T20:50:27.730Z",
    "dateReserved": "2026-05-01T16:03:30.275Z",
    "dateUpdated": "2026-07-10T20:50:27.730Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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.

Detection rules are retrieved from Rulezet.

Action not permitted

GHSA-Q4G7-PM99-9F7G

CVE-2026-7639 (GCVE-0-2026-7639)

Tags

Sightings

Nomenclature