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CVE-2026-9034

Status: Awaiting AnalysisHigh (7.8)—

Use After Free vulnerability in Arm Ltd Bifrost GPU Userspace Driver, Arm Ltd Valhall GPU Userspace Driver, Arm Ltd Arm 5th Gen GPU Architecture Userspace Driver allows a non-privileged user process to perform valid GPU processing operations, including via WebGL or WebGPU, to access already freed memory.

This issue affects Bifrost GPU Userspace Driver: from r42p0 through r49p5, from r50p0 through r51p0, from r54p1 through r54p3; Valhall GPU Userspace Driver: from r42p0 through r49p5, from r50p0 through r54p3, r55p0; Arm 5th Gen GPU Architecture Userspace Driver: from r42p0 through r49p5, from r50p0 through r54p3, r55p0.

CVSS

Exploitation probability (EPSS)

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

🎯 ATT&CK techniques

How this vulnerability is exploited and what the attacker gains, in MITRE ATT&CK terms.

CWE-416 (Use After Free) en driver GPU con AV:L/PR:L permite a usuario no-privilegiado acceder memoria liberada vía WebGL/WebGPU, consiguiendo lectura de datos y potencial ejecución de código en contexto GPU.

Inferred by our analysis agent from the official description, CVSS vector and CWE, and checked by a supervisor. May contain errors.

🛡️ ATT&CK mitigations that cover these techniques

Execution PreventionThreat Intelligence ProgramRestrict Web-Based ContentPrivileged Account ManagementLimit Software InstallationBehavior Prevention on Endpoint

Affected technologies (3)

⚠ AI-inferred from the description — NVD hasn't analyzed this CVE yet, these aren't verified CPEs.

ARM — 5TH GEN GPU Architecture Userspace DriverAIARM — Bifrost GPU Userspace DriverAIARM — Valhall GPU Userspace DriverAI

CWEs

References

Raw JSON (NVD)

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{
  "id": "CVE-2026-9034",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-9034",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-09-10T18:02:25.753459Z"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 7.8,
          "attackVector": "LOCAL",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.9,
        "exploitabilityScore": 1.8
      }
    ]
  },
  "affected": [
    {
      "source": "arm-security@arm.com",
      "affectedData": [
        {
          "vendor": "Arm Ltd",
          "product": "Bifrost GPU Userspace Driver",
          "versions": [
            {
              "status": "affected",
              "version": "r42p0",
              "versionType": "patch",
              "lessThanOrEqual": "r49p5"
            },
            {
              "status": "affected",
              "version": "r50p0",
              "versionType": "patch",
              "lessThanOrEqual": "r51p0"
            },
            {
              "status": "affected",
              "version": "r54p1",
              "versionType": "patch",
              "lessThanOrEqual": "r54p3"
            }
          ],
          "defaultStatus": "unaffected"
        },
        {
          "vendor": "Arm Ltd",
          "product": "Valhall GPU Userspace Driver",
          "versions": [
            {
              "status": "affected",
              "version": "r42p0",
              "versionType": "patch",
              "lessThanOrEqual": "r49p5"
            },
            {
              "status": "affected",
              "version": "r50p0",
              "versionType": "patch",
              "lessThanOrEqual": "r54p3"
            },
            {
              "status": "affected",
              "version": "r55p0",
              "versionType": "patch"
            },
            {
              "status": "unaffected",
              "version": "r56p0",
              "versionType": "patch"
            }
          ],
          "defaultStatus": "unaffected"
        },
        {
          "vendor": "Arm Ltd",
          "product": "Arm 5th Gen GPU Architecture Userspace Driver",
          "versions": [
            {
              "status": "affected",
              "version": "r42p0",
              "versionType": "patch",
              "lessThanOrEqual": "r49p5"
            },
            {
              "status": "affected",
              "version": "r50p0",
              "versionType": "patch",
              "lessThanOrEqual": "r54p3"
            },
            {
              "status": "affected",
              "version": "r55p0",
              "versionType": "patch"
            },
            {
              "status": "unaffected",
              "version": "r56p0",
              "versionType": "patch"
            }
          ],
          "defaultStatus": "unaffected"
        }
      ]
    }
  ],
  "published": "2026-09-08T15:18:56.353",
  "references": [
    {
      "url": "https://support.arm.com/documentation/111552/1-0/?lang=en",
      "source": "arm-security@arm.com"
    }
  ],
  "vulnStatus": "Awaiting Analysis",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "arm-security@arm.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-416"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Use After Free vulnerability in Arm Ltd Bifrost GPU Userspace Driver, Arm Ltd Valhall GPU Userspace Driver, Arm Ltd Arm 5th Gen GPU Architecture Userspace Driver allows a non-privileged user process to perform valid GPU processing operations, including via WebGL or WebGPU, to access already freed memory.\n\n\n\nThis issue affects Bifrost GPU Userspace Driver: from r42p0 through r49p5, from r50p0 through r51p0, from r54p1 through r54p3; Valhall GPU Userspace Driver: from r42p0 through r49p5, from r50p0 through r54p3, r55p0; Arm 5th Gen GPU Architecture Userspace Driver: from r42p0 through r49p5, from r50p0 through r54p3, r55p0."
    }
  ],
  "lastModified": "2026-09-10T19:17:42.527",
  "sourceIdentifier": "arm-security@arm.com"
}