{
  "cveId": "CVE-2024-11477",
  "url": "https://patchblox.com/security/cve/CVE-2024-11477",
  "summary": "CVE-2024-11477 is fixed in 7zip on 1 platform, first by DEBIAN-CVE-2024-11477, released November 22, 2024. It is not reported as exploited. Patch Radar priority: High.",
  "title": "7zip: 7-Zip Zstandard Decompression Integer Underflow Remote Code Execution Vulnerability",
  "description": "7-Zip Zstandard Decompression Integer Underflow Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of 7-Zip. Interaction with this library is required to exploit this vulnerability but attack vectors may vary depending on the implementation.  The specific flaw exists within the implementation of Zstandard decompression. The issue results from the lack of proper validation of user-supplied data, which can result in an integer underflow before writing to memory. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-24346.",
  "published": "2024-11-22T21:15:08Z",
  "severity": "high",
  "cvss": 7.8,
  "cvssVector": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
  "epss": 0.2239,
  "epssPercentile": 0.97709,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "7zip",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "24.07\u002Bdfsg-1",
      "fix": "DEBIAN-CVE-2024-11477",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2024-11477",
      "released": "2024-11-22T21:15:08Z"
    },
    {
      "platform": "linux",
      "product": "7zip",
      "release": "Debian 14",
      "fixedVersion": "24.07\u002Bdfsg-1",
      "fix": "DEBIAN-CVE-2024-11477",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2024-11477",
      "released": "2024-11-22T21:15:08Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T13:06:02Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}