{
  "cveId": "CVE-2021-43312",
  "url": "https://patchblox.com/security/cve/CVE-2021-43312",
  "summary": "CVE-2021-43312 is fixed in upx-ucl on 1 platform, first by DEBIAN-CVE-2021-43312, released March 24, 2023. It is not reported as exploited. Patch Radar priority: High.",
  "title": "upx-ucl: A heap-based buffer overflow was discovered in upx, during the variable \u0027bucket\u0027 points to an inaccessible address",
  "description": "A heap-based buffer overflow was discovered in upx, during the variable \u0027bucket\u0027 points to an inaccessible address. The issue is being triggered in the function PackLinuxElf64::invert_pt_dynamic at p_lx_elf.cpp:5239.",
  "published": "2023-03-24T20:15:08Z",
  "severity": "high",
  "cvss": 7.5,
  "cvssVector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
  "epss": 0.00817,
  "epssPercentile": 0.57364,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "upx-ucl",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "4.2.2-1",
      "fix": "DEBIAN-CVE-2021-43312",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2021-43312",
      "released": "2023-03-24T20:15:08Z"
    },
    {
      "platform": "linux",
      "product": "upx-ucl",
      "release": "Debian 14",
      "fixedVersion": "4.2.2-1",
      "fix": "DEBIAN-CVE-2021-43312",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2021-43312",
      "released": "2023-03-24T20:15:08Z"
    }
  ],
  "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"
  }
}