{
  "cveId": "CVE-2026-21444",
  "url": "https://patchblox.com/security/cve/CVE-2026-21444",
  "summary": "CVE-2026-21444 is fixed in 4 products on 1 platform, first by FEDORA-2026-21A2A74849, released January 2, 2026. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "libtpms returns wrong initialization vector when certain symmetric ciphers are used",
  "description": "libtpms, a library that provides software emulation of a Trusted Platform Module, has a flaw in versions 0.10.0 and 0.10.1. The commonly used integration of libtpms with OpenSSL 3.x contained a vulnerability related to the returned IV (initialization vector) when certain symmetric ciphers were used. Instead of returning the last IV it returned the initial IV to the caller, thus weakening the subsequent encryption and decryption steps. The highest threat from this vulnerability is to data confidentiality. Version 0.10.2 fixes the issue. No known workarounds are available.",
  "published": "2026-01-02T17:31:29Z",
  "severity": "Moderate",
  "cvss": 5.5,
  "cvssVector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N",
  "cwe": "Use of a Broken or Risky Cryptographic Algorithm",
  "epss": 0.0008,
  "epssPercentile": 0.00152,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21444",
  "fixes": [
    {
      "platform": "linux",
      "product": "libtpms",
      "release": "Debian 14",
      "fixedVersion": "0.10.2-1",
      "fix": "DEBIAN-CVE-2026-21444",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-21444",
      "released": "2026-01-02T19:15:48Z"
    },
    {
      "platform": "linux",
      "product": "libtpms",
      "release": "Fedora 43",
      "fixedVersion": "0.10.2-1.fc43",
      "fix": "FEDORA-2026-21A2A74849",
      "url": "https://patchblox.com/security/fix/linux/fedora-2026-21a2a74849",
      "released": "2026-01-02T17:31:29Z"
    },
    {
      "platform": "linux",
      "product": "libtpms-debuginfo",
      "release": "Fedora 43",
      "fixedVersion": "0.10.2-1.fc43",
      "fix": "FEDORA-2026-21A2A74849",
      "url": "https://patchblox.com/security/fix/linux/fedora-2026-21a2a74849",
      "released": "2026-01-02T17:31:29Z"
    },
    {
      "platform": "linux",
      "product": "libtpms-debugsource",
      "release": "Fedora 43",
      "fixedVersion": "0.10.2-1.fc43",
      "fix": "FEDORA-2026-21A2A74849",
      "url": "https://patchblox.com/security/fix/linux/fedora-2026-21a2a74849",
      "released": "2026-01-02T17:31:29Z"
    },
    {
      "platform": "linux",
      "product": "libtpms-devel",
      "release": "Fedora 43",
      "fixedVersion": "0.10.2-1.fc43",
      "fix": "FEDORA-2026-21A2A74849",
      "url": "https://patchblox.com/security/fix/linux/fedora-2026-21a2a74849",
      "released": "2026-01-02T17:31:29Z"
    }
  ],
  "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"
  }
}