{
  "cveId": "CVE-2021-44732",
  "url": "https://patchblox.com/security/cve/CVE-2021-44732",
  "summary": "CVE-2021-44732 is fixed in 6 products on 1 platform, first by DEBIAN-CVE-2021-44732, released December 20, 2021. It is not reported as exploited. Patch Radar priority: Urgent.",
  "title": "mbedtls: Mbed TLS before 3.0.1 has a double free in certain out-of-memory conditions, as demonstrated by an mbedtls_ssl_set_se...",
  "description": "Mbed TLS before 3.0.1 has a double free in certain out-of-memory conditions, as demonstrated by an mbedtls_ssl_set_session() failure.",
  "published": "2021-12-20T00:15:00Z",
  "severity": "critical",
  "cvss": 9.8,
  "cvssVector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
  "epss": 0.0277,
  "epssPercentile": 0.86405,
  "priority": "Urgent",
  "priorityTier": 2,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "libmbedcrypto1",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "2.8.0-1ubuntu0.1~esm1",
      "fix": "libmbedcrypto1 2.8.0-1ubuntu0.1~esm1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-libmbedcrypto1-2.8.0-1ubuntu0.1-esm1",
      "released": "2025-07-20T12:15:00Z"
    },
    {
      "platform": "linux",
      "product": "libmbedcrypto3",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "2.16.4-1ubuntu2\u002Besm1",
      "fix": "libmbedcrypto3 2.16.4-1ubuntu2\u002Besm1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-libmbedcrypto3-2.16.4-1ubuntu2-esm1",
      "released": "2025-07-20T12:15:00Z"
    },
    {
      "platform": "linux",
      "product": "libmbedtls10",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "2.8.0-1ubuntu0.1~esm1",
      "fix": "libmbedtls10 2.8.0-1ubuntu0.1~esm1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-libmbedtls10-2.8.0-1ubuntu0.1-esm1",
      "released": "2025-07-20T12:15:00Z"
    },
    {
      "platform": "linux",
      "product": "libmbedtls12",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "2.16.4-1ubuntu2\u002Besm1",
      "fix": "libmbedtls12 2.16.4-1ubuntu2\u002Besm1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-libmbedtls12-2.16.4-1ubuntu2-esm1",
      "released": "2025-07-20T12:15:00Z"
    },
    {
      "platform": "linux",
      "product": "libmbedx509-0",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "2.8.0-1ubuntu0.1~esm1",
      "fix": "libmbedx509-0 2.8.0-1ubuntu0.1~esm1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-libmbedx509-0-2.8.0-1ubuntu0.1-esm1",
      "released": "2025-07-20T12:15:00Z"
    },
    {
      "platform": "linux",
      "product": "libmbedx509-0",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "2.16.4-1ubuntu2\u002Besm1",
      "fix": "libmbedx509-0 2.16.4-1ubuntu2\u002Besm1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-libmbedx509-0-2.16.4-1ubuntu2-esm1",
      "released": "2025-07-20T12:15:00Z"
    },
    {
      "platform": "linux",
      "product": "mbedtls",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "2.28.0-0.3",
      "fix": "DEBIAN-CVE-2021-44732",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2021-44732",
      "released": "2021-12-20T08:15:06Z"
    },
    {
      "platform": "linux",
      "product": "mbedtls",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "2.28.0-0.3",
      "fix": "DEBIAN-CVE-2021-44732",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2021-44732",
      "released": "2021-12-20T08:15:06Z"
    },
    {
      "platform": "linux",
      "product": "mbedtls",
      "release": "Debian 14",
      "fixedVersion": "2.28.0-0.3",
      "fix": "DEBIAN-CVE-2021-44732",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2021-44732",
      "released": "2021-12-20T08:15:06Z"
    }
  ],
  "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"
  }
}