{
  "cveId": "CVE-2019-8955",
  "url": "https://patchblox.com/security/cve/CVE-2019-8955",
  "summary": "CVE-2019-8955 is fixed in 2 products on 1 platform, first by tor 0.3.2.10-1ubuntu0.2~esm1, released February 21, 2019. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "tor: In Tor before 0.3.3.12, 0.3.4.x before 0.3.4.11, 0.3.5.x before 0.3.5.8, and 0.4.x before 0.4.0.2-alpha, remote denia...",
  "description": "In Tor before 0.3.3.12, 0.3.4.x before 0.3.4.11, 0.3.5.x before 0.3.5.8, and 0.4.x before 0.4.0.2-alpha, remote denial of service against Tor clients and relays can occur via memory exhaustion in the KIST cell scheduler.",
  "published": "2019-02-21T15:29:00Z",
  "severity": "Medium",
  "epss": 0.04572,
  "epssPercentile": 0.91673,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "tor",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "0.3.2.10-1ubuntu0.2~esm1",
      "fix": "tor 0.3.2.10-1ubuntu0.2~esm1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-tor-0.3.2.10-1ubuntu0.2-esm1",
      "released": "2019-02-21T15:29:00Z"
    },
    {
      "platform": "linux",
      "product": "tor-geoipdb",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "0.3.2.10-1ubuntu0.2~esm1",
      "fix": "tor-geoipdb 0.3.2.10-1ubuntu0.2~esm1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-tor-geoipdb-0.3.2.10-1ubuntu0.2-esm1",
      "released": "2019-02-21T15:29:00Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-07T18:46:35Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}