{
  "cveId": "CVE-2021-40656",
  "url": "https://patchblox.com/security/cve/CVE-2021-40656",
  "summary": "CVE-2021-40656 is fixed in libsixel on 1 platform, first by DEBIAN-CVE-2021-40656, released April 8, 2022. It is not reported as exploited. Patch Radar priority: High.",
  "title": "libsixel: libsixel before 1.10 is vulnerable to Buffer Overflow in libsixel/src/quant.c:867.",
  "description": "libsixel before 1.10 is vulnerable to Buffer Overflow in libsixel/src/quant.c:867.",
  "published": "2022-04-08T16:15:08Z",
  "severity": "high",
  "cvss": 8.8,
  "cvssVector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
  "epss": 0.01019,
  "epssPercentile": 0.63563,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "libsixel",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "1.10.3-1",
      "fix": "DEBIAN-CVE-2021-40656",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2021-40656",
      "released": "2022-04-08T16:15:08Z"
    },
    {
      "platform": "linux",
      "product": "libsixel",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "1.10.3-1",
      "fix": "DEBIAN-CVE-2021-40656",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2021-40656",
      "released": "2022-04-08T16:15:08Z"
    },
    {
      "platform": "linux",
      "product": "libsixel",
      "release": "Debian 14",
      "fixedVersion": "1.10.3-1",
      "fix": "DEBIAN-CVE-2021-40656",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2021-40656",
      "released": "2022-04-08T16:15:08Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T00:53:09Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}