{
  "cveId": "CVE-2021-36976",
  "url": "https://patchblox.com/security/cve/CVE-2021-36976",
  "summary": "CVE-2021-36976 is fixed in 33 products on 2 platforms, first by libarchive-tools 3.5.2-1ubuntu1, released July 20, 2021. It is not reported as exploited. Patch Radar priority: High.",
  "title": "Libarchive Remote Code Execution Vulnerability",
  "description": "libarchive - security update",
  "published": "2021-07-20T00:15:00Z",
  "severity": "Important",
  "epss": 0.02845,
  "epssPercentile": 0.86782,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": true,
  "exploitabilityAssessment": "Exploitation Less Likely",
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-36976",
  "fixes": [
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 1809 for 32-bit Systems",
      "fixedVersion": "17763.2452",
      "fix": "KB5009557",
      "url": "https://patchblox.com/security/fix/microsoft/kb5009557",
      "released": "2022-01-11T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 1809 for ARM64-based Systems",
      "fixedVersion": "17763.2452",
      "fix": "KB5009557",
      "url": "https://patchblox.com/security/fix/microsoft/kb5009557",
      "released": "2022-01-11T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 1809 for x64-based Systems",
      "fixedVersion": "17763.2452",
      "fix": "KB5009557",
      "url": "https://patchblox.com/security/fix/microsoft/kb5009557",
      "released": "2022-01-11T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 1909 for 32-bit Systems",
      "fixedVersion": "18363.2037",
      "fix": "KB5009545",
      "url": "https://patchblox.com/security/fix/microsoft/kb5009545",
      "released": "2022-01-11T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 1909 for ARM64-based Systems",
      "fixedVersion": "18363.2037",
      "fix": "KB5009545",
      "url": "https://patchblox.com/security/fix/microsoft/kb5009545",
      "released": "2022-01-11T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 1909 for x64-based Systems",
      "fixedVersion": "18363.2037",
      "fix": "KB5009545",
      "url": "https://patchblox.com/security/fix/microsoft/kb5009545",
      "released": "2022-01-11T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 20H2 for 32-bit Systems",
      "fixedVersion": "",
      "fix": "KB5009543",
      "url": "https://patchblox.com/security/fix/microsoft/kb5009543",
      "released": "2022-01-11T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 20H2 for ARM64-based Systems",
      "fixedVersion": "",
      "fix": "KB5009543",
      "url": "https://patchblox.com/security/fix/microsoft/kb5009543",
      "released": "2022-01-11T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 21H1 for 32-bit Systems",
      "fixedVersion": "",
      "fix": "KB5009543",
      "url": "https://patchblox.com/security/fix/microsoft/kb5009543",
      "released": "2022-01-11T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 21H1 for ARM64-based Systems",
      "fixedVersion": "",
      "fix": "KB5009543",
      "url": "https://patchblox.com/security/fix/microsoft/kb5009543",
      "released": "2022-01-11T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 21H1 for x64-based Systems",
      "fixedVersion": "",
      "fix": "KB5009543",
      "url": "https://patchblox.com/security/fix/microsoft/kb5009543",
      "released": "2022-01-11T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 21H2 for 32-bit Systems",
      "fixedVersion": "",
      "fix": "KB5009543",
      "url": "https://patchblox.com/security/fix/microsoft/kb5009543",
      "released": "2022-01-11T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 21H2 for ARM64-based Systems",
      "fixedVersion": "",
      "fix": "KB5009543",
      "url": "https://patchblox.com/security/fix/microsoft/kb5009543",
      "released": "2022-01-11T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 21H2 for x64-based Systems",
      "fixedVersion": "",
      "fix": "KB5009543",
      "url": "https://patchblox.com/security/fix/microsoft/kb5009543",
      "released": "2022-01-11T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 11 version 21H2 for ARM64-based Systems",
      "fixedVersion": "22000.434",
      "fix": "KB5009566",
      "url": "https://patchblox.com/security/fix/microsoft/kb5009566",
      "released": "2022-01-11T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 11 version 21H2 for x64-based Systems",
      "fixedVersion": "22000.434",
      "fix": "KB5009566",
      "url": "https://patchblox.com/security/fix/microsoft/kb5009566",
      "released": "2022-01-11T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server 2019",
      "fixedVersion": "17763.2452",
      "fix": "KB5009557",
      "url": "https://patchblox.com/security/fix/microsoft/kb5009557",
      "released": "2022-01-11T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server 2019 (Server Core installation)",
      "fixedVersion": "17763.2452",
      "fix": "KB5009557",
      "url": "https://patchblox.com/security/fix/microsoft/kb5009557",
      "released": "2022-01-11T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server 2022",
      "fixedVersion": "20348.469",
      "fix": "KB5009555",
      "url": "https://patchblox.com/security/fix/microsoft/kb5009555",
      "released": "2022-01-11T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server 2022 (Server Core installation)",
      "fixedVersion": "20348.469",
      "fix": "KB5009555",
      "url": "https://patchblox.com/security/fix/microsoft/kb5009555",
      "released": "2022-01-11T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server, version 20H2 (Server Core Installation)",
      "fixedVersion": "",
      "fix": "KB5009543",
      "url": "https://patchblox.com/security/fix/microsoft/kb5009543",
      "released": "2022-01-11T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "bsdcat",
      "release": "amzn 2023",
      "fixedVersion": "3.5.3-2.amzn2023.0.2",
      "fix": "ALAS2023-2023-071",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-071",
      "released": "2023-02-17T20:46:00Z"
    },
    {
      "platform": "linux",
      "product": "bsdcat-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "3.5.3-2.amzn2023.0.2",
      "fix": "ALAS2023-2023-071",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-071",
      "released": "2023-02-17T20:46:00Z"
    },
    {
      "platform": "linux",
      "product": "bsdcpio",
      "release": "amzn 2023",
      "fixedVersion": "3.5.3-2.amzn2023.0.2",
      "fix": "ALAS2023-2023-071",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-071",
      "released": "2023-02-17T20:46:00Z"
    },
    {
      "platform": "linux",
      "product": "bsdcpio-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "3.5.3-2.amzn2023.0.2",
      "fix": "ALAS2023-2023-071",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-071",
      "released": "2023-02-17T20:46:00Z"
    },
    {
      "platform": "linux",
      "product": "bsdtar",
      "release": "amzn 2023",
      "fixedVersion": "3.5.3-2.amzn2023.0.2",
      "fix": "ALAS2023-2023-071",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-071",
      "released": "2023-02-17T20:46:00Z"
    },
    {
      "platform": "linux",
      "product": "bsdtar-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "3.5.3-2.amzn2023.0.2",
      "fix": "ALAS2023-2023-071",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-071",
      "released": "2023-02-17T20:46:00Z"
    },
    {
      "platform": "linux",
      "product": "libarchive",
      "release": "Debian 11.6 (bullseye)",
      "fixedVersion": "3.4.3-2\u002Bdeb11u2",
      "fix": "DLA-3950-1",
      "url": "https://patchblox.com/security/fix/linux/dla-3950-1",
      "released": "2024-11-11T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "libarchive",
      "release": "amzn 2023",
      "fixedVersion": "3.5.3-2.amzn2023.0.2",
      "fix": "ALAS2023-2023-071",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-071",
      "released": "2023-02-17T20:46:00Z"
    },
    {
      "platform": "linux",
      "product": "libarchive-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "3.5.3-2.amzn2023.0.2",
      "fix": "ALAS2023-2023-071",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-071",
      "released": "2023-02-17T20:46:00Z"
    },
    {
      "platform": "linux",
      "product": "libarchive-debugsource",
      "release": "amzn 2023",
      "fixedVersion": "3.5.3-2.amzn2023.0.2",
      "fix": "ALAS2023-2023-071",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-071",
      "released": "2023-02-17T20:46:00Z"
    },
    {
      "platform": "linux",
      "product": "libarchive-devel",
      "release": "amzn 2023",
      "fixedVersion": "3.5.3-2.amzn2023.0.2",
      "fix": "ALAS2023-2023-071",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-071",
      "released": "2023-02-17T20:46:00Z"
    },
    {
      "platform": "linux",
      "product": "libarchive-tools",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "3.4.0-2ubuntu1.1",
      "fix": "libarchive-tools 3.4.0-2ubuntu1.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-libarchive-tools-3.4.0-2ubuntu1.1",
      "released": "2021-12-23T16:00:00Z"
    },
    {
      "platform": "linux",
      "product": "libarchive-tools",
      "release": "Ubuntu 22.04.1 LTS (jammy)",
      "fixedVersion": "3.5.2-1ubuntu1",
      "fix": "libarchive-tools 3.5.2-1ubuntu1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-libarchive-tools-3.5.2-1ubuntu1",
      "released": "2021-07-20T00:15:00Z"
    },
    {
      "platform": "linux",
      "product": "libarchive13",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "3.4.0-2ubuntu1.1",
      "fix": "libarchive13 3.4.0-2ubuntu1.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-libarchive13-3.4.0-2ubuntu1.1",
      "released": "2021-12-23T16:00:00Z"
    },
    {
      "platform": "linux",
      "product": "libarchive13",
      "release": "Ubuntu 22.04.1 LTS (jammy)",
      "fixedVersion": "3.5.2-1ubuntu1",
      "fix": "libarchive13 3.5.2-1ubuntu1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-libarchive13-3.5.2-1ubuntu1",
      "released": "2021-07-20T00:15:00Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T19:12:23Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}