{
  "cveId": "CVE-2021-33644",
  "url": "https://patchblox.com/security/cve/CVE-2021-33644",
  "summary": "CVE-2021-33644 is fixed in 3 products on 1 platform, first by libtar0 1.2.20-7ubuntu0.1~esm1, released August 10, 2022. It is not reported as exploited. Patch Radar priority: High.",
  "title": "libtar0t64: An attacker who submits a crafted tar file with size in header struct being0 may be able to trigger an calling of mal...",
  "description": "An attacker who submits a crafted tar file with size in header struct being0 may be able to trigger an calling of malloc(0) for a variablegnu_longname, causing an out-of-bounds read.",
  "published": "2022-08-10T13:15:00Z",
  "severity": "Medium",
  "cvss": 8.1,
  "cvssVector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H",
  "epss": 0.01576,
  "epssPercentile": 0.75615,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "libtar",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "1.2.20-8\u002Bdeb12u1",
      "fix": "DEBIAN-CVE-2021-33644",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2021-33644",
      "released": "2022-08-10T20:15:20Z"
    },
    {
      "platform": "linux",
      "product": "libtar",
      "release": "RHEL 8",
      "fixedVersion": "0:1.2.20-17.el8",
      "fix": "RHSA-2023:2898",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2023-2898",
      "released": "2023-05-16T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "libtar",
      "release": "almalinux 8",
      "fixedVersion": "1.2.20-17.el8",
      "fix": "ALSA-2023:2898",
      "url": "https://patchblox.com/security/fix/linux/alsa-2023-2898",
      "released": "2023-05-16T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "libtar",
      "release": "ol 8",
      "fixedVersion": "0:1.2.20-17.el8",
      "fix": "ELSA-2023-2898",
      "url": "https://patchblox.com/security/fix/linux/elsa-2023-2898",
      "released": "2023-05-24T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "libtar",
      "release": "rocky 8",
      "fixedVersion": "0:1.2.20-17.el8",
      "fix": "RLSA-2023:2898",
      "url": "https://patchblox.com/security/fix/linux/rlsa-2023-2898",
      "released": "2025-12-27T09:04:03Z"
    },
    {
      "platform": "linux",
      "product": "libtar0",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "1.2.20-7ubuntu0.1~esm1",
      "fix": "libtar0 1.2.20-7ubuntu0.1~esm1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-libtar0-1.2.20-7ubuntu0.1-esm1",
      "released": "2022-08-10T13:15:00Z"
    },
    {
      "platform": "linux",
      "product": "libtar0",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "1.2.20-8ubuntu0.20.04.1",
      "fix": "libtar0 1.2.20-8ubuntu0.20.04.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-libtar0-1.2.20-8ubuntu0.20.04.1",
      "released": "2022-08-10T13:15:00Z"
    },
    {
      "platform": "linux",
      "product": "libtar0",
      "release": "Ubuntu 22.04.1 LTS (jammy)",
      "fixedVersion": "1.2.20-8ubuntu0.22.04.1",
      "fix": "libtar0 1.2.20-8ubuntu0.22.04.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-libtar0-1.2.20-8ubuntu0.22.04.1",
      "released": "2022-08-10T13:15:00Z"
    },
    {
      "platform": "linux",
      "product": "libtar0t64",
      "release": "Ubuntu 24.04.5 LTS (noble)",
      "fixedVersion": "1.2.20-8.1ubuntu0.24.04.1",
      "fix": "libtar0t64 1.2.20-8.1ubuntu0.24.04.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-noble-libtar0t64-1.2.20-8.1ubuntu0.24.04.1",
      "released": "2022-08-10T13:15:00Z"
    },
    {
      "platform": "linux",
      "product": "libtar0t64",
      "release": "Ubuntu 24.10 (oracular)",
      "fixedVersion": "1.2.20-8.1ubuntu0.24.10.1",
      "fix": "libtar0t64 1.2.20-8.1ubuntu0.24.10.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-oracular-libtar0t64-1.2.20-8.1ubuntu0.24.10.1",
      "released": "2026-01-16T01:42:22Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T06:59:42Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}