{
  "id": "CVE-2021-29256",
  "url": "https://spydr.io/cve/CVE-2021-29256",
  "published": "2021-05-24T18:15:08.033Z",
  "modified": "2026-06-17T03:47:27.647Z",
  "score": 8.8,
  "severity": "high",
  "cvss_version": "3.1",
  "vector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
  "score_source": "NVD",
  "epss": 0.02988,
  "epss_percentile": 0.86907,
  "exploited": true,
  "kev": {
    "added": "2023-07-07",
    "due": "2023-07-28",
    "action": "Apply updates per vendor instructions or discontinue use of the product if updates are unavailable.",
    "ransomware": "Unknown",
    "name": "Arm Mali GPU Kernel Driver Use-After-Free Vulnerability",
    "notes": "https://developer.arm.com/Arm%20Security%20Center/Mali%20GPU%20Driver%20Vulnerabilities; https://nvd.nist.gov/vuln/detail/CVE-2021-29256"
  },
  "ssvc_exploitation": "active",
  "vendors": [
    "arm"
  ],
  "products": [
    "arm bifrost gpu kernel driver",
    "arm midgard gpu kernel driver",
    "arm valhall gpu kernel driver"
  ],
  "cwes": [
    "CWE-416"
  ],
  "description": ". The Arm Mali GPU kernel driver allows an unprivileged user to achieve access to freed memory, leading to information disclosure or root privilege escalation. This affects Bifrost r16p0 through r29p0 before r30p0, Valhall r19p0 through r29p0 before r30p0, and Midgard r28p0 through r30p0.",
  "status": "Analyzed",
  "score_type": "Primary",
  "scores": {
    "cvss_v40": null,
    "cvss_v31": 8.8,
    "cvss_v30": null
  },
  "references": [
    {
      "url": "https://developer.arm.com/support/arm-security-updates/mali-gpu-kernel-driver",
      "tags": [
        "Vendor Advisory"
      ]
    },
    {
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-29256",
      "tags": [
        "US Government Resource"
      ]
    }
  ],
  "nvd_url": "https://nvd.nist.gov/vuln/detail/CVE-2021-29256",
  "covered_in": [],
  "attribution": [
    {
      "source": "NVD",
      "url": "https://nvd.nist.gov",
      "notice": "This product uses data from the NVD API but is not endorsed or certified by the NVD."
    },
    {
      "source": "CISA KEV",
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog",
      "notice": "Known exploited vulnerabilities from the CISA KEV catalog."
    },
    {
      "source": "FIRST EPSS",
      "url": "https://www.first.org/epss",
      "notice": "Exploit prediction scores from FIRST EPSS."
    }
  ]
}