{
  "cveId": "CVE-2021-45960",
  "url": "https://patchblox.com/security/cve/CVE-2021-45960",
  "summary": "CVE-2021-45960 is fixed in 9 products on 1 platform, first by DEBIAN-CVE-2021-45960, released January 1, 2022. It is not reported as exploited. Patch Radar priority: High.",
  "title": "expat: In Expat (aka libexpat) before 2.4.3, a left shift by 29 (or more) placesin the storeAtts function in xmlparse.c can...",
  "description": "In Expat (aka libexpat) before 2.4.3, a left shift by 29 (or more) placesin the storeAtts function in xmlparse.c can lead to realloc misbehavior(e.g., allocating too few bytes, or only freeing memory).",
  "published": "2022-01-01T11:15:00Z",
  "severity": "Low",
  "cvss": 9.8,
  "cvssVector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
  "epss": 0.04672,
  "epssPercentile": 0.91821,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "expat",
      "release": "Debian 11.6 (bullseye)",
      "fixedVersion": "2.2.10-2\u002Bdeb11u1",
      "fix": "DSA-5073-1",
      "url": "https://patchblox.com/security/fix/linux/dsa-5073-1",
      "released": "2022-02-12T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "expat",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "2.4.3-1",
      "fix": "DEBIAN-CVE-2021-45960",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2021-45960",
      "released": "2022-01-01T19:15:08Z"
    },
    {
      "platform": "linux",
      "product": "expat",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "2.4.3-1",
      "fix": "DEBIAN-CVE-2021-45960",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2021-45960",
      "released": "2022-01-01T19:15:08Z"
    },
    {
      "platform": "linux",
      "product": "expat",
      "release": "Debian 14",
      "fixedVersion": "2.4.3-1",
      "fix": "DEBIAN-CVE-2021-45960",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2021-45960",
      "released": "2022-01-01T19:15:08Z"
    },
    {
      "platform": "linux",
      "product": "expat",
      "release": "RHEL 8",
      "fixedVersion": "0:2.2.5-4.el8_5.3",
      "fix": "RHSA-2022:0951",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2022-0951",
      "released": "2022-03-16T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "expat",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "2.2.5-3ubuntu0.4",
      "fix": "expat 2.2.5-3ubuntu0.4",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-expat-2.2.5-3ubuntu0.4",
      "released": "2022-02-14T16:00:00Z"
    },
    {
      "platform": "linux",
      "product": "expat",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "2.2.9-1ubuntu0.2",
      "fix": "expat 2.2.9-1ubuntu0.2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-expat-2.2.9-1ubuntu0.2",
      "released": "2022-02-14T16:00:00Z"
    },
    {
      "platform": "linux",
      "product": "expat",
      "release": "Ubuntu 22.04.1 LTS (jammy)",
      "fixedVersion": "2.4.3-1",
      "fix": "expat 2.4.3-1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-expat-2.4.3-1",
      "released": "2022-01-10T06:12:00Z"
    },
    {
      "platform": "linux",
      "product": "expat",
      "release": "Ubuntu 24.10 (oracular)",
      "fixedVersion": "2.4.3-1",
      "fix": "expat 2.4.3-1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-oracular-expat-2.4.3-1",
      "released": "2026-01-16T01:42:22Z"
    },
    {
      "platform": "linux",
      "product": "expat",
      "release": "Ubuntu 25.04 (plucky)",
      "fixedVersion": "2.4.3-1",
      "fix": "expat 2.4.3-1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-plucky-expat-2.4.3-1",
      "released": "2026-01-16T01:42:24Z"
    },
    {
      "platform": "linux",
      "product": "expat",
      "release": "almalinux 8",
      "fixedVersion": "2.2.5-8.el8_6.2",
      "fix": "ALSA-2022:0951",
      "url": "https://patchblox.com/security/fix/linux/alsa-2022-0951",
      "released": "2022-03-16T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "expat",
      "release": "amzn 2023",
      "fixedVersion": "2.5.0-1.amzn2023.0.2",
      "fix": "ALAS2023-2023-058",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-058",
      "released": "2023-02-17T20:45:00Z"
    },
    {
      "platform": "linux",
      "product": "expat",
      "release": "ol 8",
      "fixedVersion": "0:2.2.5-4.el8_5.3",
      "fix": "ELSA-2022-0951",
      "url": "https://patchblox.com/security/fix/linux/elsa-2022-0951",
      "released": "2022-03-16T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "expat",
      "release": "rocky 8",
      "fixedVersion": "0:2.2.5-4.el8_5.3",
      "fix": "RLSA-2022:0951",
      "url": "https://patchblox.com/security/fix/linux/rlsa-2022-0951",
      "released": "2022-03-16T15:13:06Z"
    },
    {
      "platform": "linux",
      "product": "expat-debuginfo",
      "release": "amzn 2023",
      "fixedVersion": "2.5.0-1.amzn2023.0.2",
      "fix": "ALAS2023-2023-058",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-058",
      "released": "2023-02-17T20:45:00Z"
    },
    {
      "platform": "linux",
      "product": "expat-debugsource",
      "release": "amzn 2023",
      "fixedVersion": "2.5.0-1.amzn2023.0.2",
      "fix": "ALAS2023-2023-058",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-058",
      "released": "2023-02-17T20:45:00Z"
    },
    {
      "platform": "linux",
      "product": "expat-devel",
      "release": "RHEL 8",
      "fixedVersion": "0:2.2.5-4.el8_5.3",
      "fix": "RHSA-2022:0951",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2022-0951",
      "released": "2022-03-16T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "expat-devel",
      "release": "almalinux 8",
      "fixedVersion": "2.2.5-8.el8_6.2",
      "fix": "ALSA-2022:0951",
      "url": "https://patchblox.com/security/fix/linux/alsa-2022-0951",
      "released": "2022-03-16T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "expat-devel",
      "release": "amzn 2023",
      "fixedVersion": "2.5.0-1.amzn2023.0.2",
      "fix": "ALAS2023-2023-058",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-058",
      "released": "2023-02-17T20:45:00Z"
    },
    {
      "platform": "linux",
      "product": "expat-devel",
      "release": "ol 8",
      "fixedVersion": "0:2.2.5-4.el8_5.3",
      "fix": "ELSA-2022-0951",
      "url": "https://patchblox.com/security/fix/linux/elsa-2022-0951",
      "released": "2022-03-16T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "expat-static",
      "release": "amzn 2023",
      "fixedVersion": "2.5.0-1.amzn2023.0.2",
      "fix": "ALAS2023-2023-058",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2023-058",
      "released": "2023-02-17T20:45:00Z"
    },
    {
      "platform": "linux",
      "product": "firefox",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "98.0\u002Bbuild3-0ubuntu0.18.04.2",
      "fix": "firefox 98.0\u002Bbuild3-0ubuntu0.18.04.2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-firefox-98.0-build3-0ubuntu0.18.04.2",
      "released": "2022-03-08T16:00:00Z"
    },
    {
      "platform": "linux",
      "product": "firefox",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "98.0\u002Bbuild3-0ubuntu0.20.04.2",
      "fix": "firefox 98.0\u002Bbuild3-0ubuntu0.20.04.2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-firefox-98.0-build3-0ubuntu0.20.04.2",
      "released": "2022-03-08T16:00:00Z"
    },
    {
      "platform": "linux",
      "product": "firefox",
      "release": "Ubuntu 22.04.1 LTS (jammy)",
      "fixedVersion": "1:1snap1-0ubuntu1",
      "fix": "firefox 1:1snap1-0ubuntu1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-firefox-1-1snap1-0ubuntu1",
      "released": "2022-04-06T17:00:00Z"
    },
    {
      "platform": "linux",
      "product": "firefox",
      "release": "Ubuntu 24.10 (oracular)",
      "fixedVersion": "1:1snap1-0ubuntu1",
      "fix": "firefox 1:1snap1-0ubuntu1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-oracular-firefox-1-1snap1-0ubuntu1",
      "released": "2022-02-15T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "firefox",
      "release": "Ubuntu 25.04 (plucky)",
      "fixedVersion": "1:1snap1-0ubuntu1",
      "fix": "firefox 1:1snap1-0ubuntu1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-plucky-firefox-1-1snap1-0ubuntu1",
      "released": "2022-02-15T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "firefox-geckodriver",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "98.0\u002Bbuild3-0ubuntu0.18.04.2",
      "fix": "firefox-geckodriver 98.0\u002Bbuild3-0ubuntu0.18.04.2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-firefox-geckodriver-98.0-build3-0ubuntu0.18.04.2",
      "released": "2022-03-08T16:00:00Z"
    },
    {
      "platform": "linux",
      "product": "firefox-geckodriver",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "98.0\u002Bbuild3-0ubuntu0.20.04.2",
      "fix": "firefox-geckodriver 98.0\u002Bbuild3-0ubuntu0.20.04.2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-firefox-geckodriver-98.0-build3-0ubuntu0.20.04.2",
      "released": "2022-03-08T16:00:00Z"
    },
    {
      "platform": "linux",
      "product": "firefox-mozsymbols",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "98.0\u002Bbuild3-0ubuntu0.18.04.2",
      "fix": "firefox-mozsymbols 98.0\u002Bbuild3-0ubuntu0.18.04.2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-firefox-mozsymbols-98.0-build3-0ubuntu0.18.04.2",
      "released": "2022-03-08T16:00:00Z"
    },
    {
      "platform": "linux",
      "product": "firefox-mozsymbols",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "98.0\u002Bbuild3-0ubuntu0.20.04.2",
      "fix": "firefox-mozsymbols 98.0\u002Bbuild3-0ubuntu0.20.04.2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-firefox-mozsymbols-98.0-build3-0ubuntu0.20.04.2",
      "released": "2022-03-08T16:00:00Z"
    },
    {
      "platform": "linux",
      "product": "libexpat1",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "2.2.5-3ubuntu0.4",
      "fix": "libexpat1 2.2.5-3ubuntu0.4",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-libexpat1-2.2.5-3ubuntu0.4",
      "released": "2022-02-14T16:00:00Z"
    },
    {
      "platform": "linux",
      "product": "libexpat1",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "2.2.9-1ubuntu0.2",
      "fix": "libexpat1 2.2.9-1ubuntu0.2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-libexpat1-2.2.9-1ubuntu0.2",
      "released": "2022-02-14T16:00:00Z"
    },
    {
      "platform": "linux",
      "product": "libexpat1",
      "release": "Ubuntu 22.04.1 LTS (jammy)",
      "fixedVersion": "2.4.3-1",
      "fix": "libexpat1 2.4.3-1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-libexpat1-2.4.3-1",
      "released": "2022-01-10T06:12:00Z"
    },
    {
      "platform": "linux",
      "product": "libexpat1",
      "release": "Ubuntu 24.10 (oracular)",
      "fixedVersion": "2.4.3-1",
      "fix": "libexpat1 2.4.3-1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-oracular-libexpat1-2.4.3-1",
      "released": "2026-01-16T01:42:22Z"
    },
    {
      "platform": "linux",
      "product": "libexpat1",
      "release": "Ubuntu 25.04 (plucky)",
      "fixedVersion": "2.4.3-1",
      "fix": "libexpat1 2.4.3-1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-plucky-libexpat1-2.4.3-1",
      "released": "2026-01-16T01:42:24Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T13:06:02Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}