{
  "fix": "DSA-5509-1",
  "url": "https://patchblox.com/security/fix/linux/dsa-5509-1",
  "summary": "DSA-5509-1, released September 29, 2023, fixes 1 CVE in firefox-esr (version 115.3.1esr-1~deb11u1). One of them is being exploited (CVE-2023-5217); 1 on CISA KEV. Patch Radar priority: Patch now. The product is no longer supported.",
  "platform": "linux",
  "type": "advisory",
  "title": "firefox-esr security update",
  "released": "2023-09-29T00:00:00Z",
  "priority": "Patch now",
  "priorityTier": 1,
  "priorityReason": "Closes CVE-2023-5217, exploited (CISA KEV)",
  "supported": false,
  "cveCount": 1,
  "exploitedCveCount": 1,
  "kevCveCount": 1,
  "ransomwareCveCount": 0,
  "maxEpss": 0.49013,
  "maxCvss": 8.8,
  "vendorAdvisory": "https://security-tracker.debian.org/tracker/CVE-2023-5217",
  "appliesTo": [
    {
      "product": "firefox-esr",
      "productUrl": "https://patchblox.com/security/product/linux/firefox-esr",
      "release": "Debian 11.6 (bullseye)",
      "fixedVersion": "115.3.1esr-1~deb11u1",
      "supported": true
    }
  ],
  "cves": [
    {
      "cveId": "CVE-2023-5217",
      "url": "https://patchblox.com/security/cve/CVE-2023-5217",
      "title": "Chromium: CVE-2023-5217 Heap buffer overflow in vp8 encoding in libvpx",
      "priority": "Patch now",
      "severity": "high",
      "cvss": 8.8,
      "epss": 0.49013,
      "kev": true,
      "ransomware": false,
      "exploited": true,
      "disclosed": true
    }
  ],
  "dataAsOf": "2026-11-07T06:34:28Z"
}