Vulnerability-Lookup

ubuntu-cve-2026-21444 Withdrawn 2026-01-06

Vulnerability from osv_ubuntu

Published

2026-01-05 00:00

Modified

2026-01-05 00:00

Summary

Details

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.

Severity

5.5 (Medium)


                    
                      CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

N/A (UNKNOWN)


                    
                      medium

References

URL

Type

	https://ubuntu.com/security/CVE-2026-21444	REPORT
	https://www.cve.org/CVERecord?id=CVE-2026-21444	REPORT
	https://github.com/stefanberger/libtpms/security/…	REPORT
	https://github.com/stefanberger/libtpms/issues/541	REPORT
	https://github.com/stefanberger/libtpms/commit/33…	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libtpms-dev",
            "binary_version": "0.9.3-0ubuntu1.22.04.2"
          },
          {
            "binary_name": "libtpms0",
            "binary_version": "0.9.3-0ubuntu1.22.04.2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "libtpms",
        "purl": "pkg:deb/ubuntu/libtpms@0.9.3-0ubuntu1.22.04.2?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.8.2-1ubuntu1",
        "0.9.0-0ubuntu1",
        "0.9.0-0ubuntu2",
        "0.9.0-0ubuntu3",
        "0.9.0-0ubuntu4",
        "0.9.3-0ubuntu1",
        "0.9.3-0ubuntu1.22.04.1",
        "0.9.3-0ubuntu1.22.04.2"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libtpms-dev",
            "binary_version": "0.9.3-0ubuntu4.24.04.1"
          },
          {
            "binary_name": "libtpms0",
            "binary_version": "0.9.3-0ubuntu4.24.04.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "libtpms",
        "purl": "pkg:deb/ubuntu/libtpms@0.9.3-0ubuntu4.24.04.1?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.9.3-0ubuntu2",
        "0.9.3-0ubuntu3",
        "0.9.3-0ubuntu4",
        "0.9.3-0ubuntu4.24.04.1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libtpms-dev",
            "binary_version": "0.9.3-0ubuntu5"
          },
          {
            "binary_name": "libtpms0",
            "binary_version": "0.9.3-0ubuntu5"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:25.10",
        "name": "libtpms",
        "purl": "pkg:deb/ubuntu/libtpms@0.9.3-0ubuntu5?arch=source\u0026distro=questing"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.9.3-0ubuntu4",
        "0.9.3-0ubuntu5"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libtpms-dev",
            "binary_version": "0.9.3-0ubuntu4.25.04.1"
          },
          {
            "binary_name": "libtpms0",
            "binary_version": "0.9.3-0ubuntu4.25.04.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:25.04",
        "name": "libtpms",
        "purl": "pkg:deb/ubuntu/libtpms@0.9.3-0ubuntu4.25.04.1?arch=source\u0026distro=plucky"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.9.3-0ubuntu4",
        "0.9.3-0ubuntu4.25.04.1"
      ]
    }
  ],
  "aliases": [],
  "details": "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.",
  "id": "UBUNTU-CVE-2026-21444",
  "modified": "2026-01-05T00:00:00Z",
  "published": "2026-01-05T00:00:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-21444"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-21444"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/stefanberger/libtpms/security/advisories/GHSA-7jxr-4j3g-p34f"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/stefanberger/libtpms/issues/541"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/stefanberger/libtpms/commit/33c9ff074cb16c1841ce7d7f33643c17c426743a"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2026-21444"
  ],
  "withdrawn": "2026-01-06T05:28:10Z"
}

CVE-2026-21444 (GCVE-0-2026-21444)

Vulnerability from cvelistv5 – Published: 2026-01-02 19:05 – Updated: 2026-01-05 20:37

Title

libtpms returns wrong initialization vector when certain symmetric ciphers are used

Summary

Severity

5.5 (Medium)


                        
                          CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-01-05 20:30 UTC

CWE

CWE-327 - Use of a Broken or Risky Cryptographic Algorithm
CWE-330 - Use of Insufficiently Random Values

Assigner

GitHub_M mitre root

References

3 references

URL	Tags
https://github.com/stefanberger/libtpms/security/…	x_refsource_CONFIRM
https://github.com/stefanberger/libtpms/issues/541	x_refsource_MISC
https://github.com/stefanberger/libtpms/commit/33…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
stefanberger	libtpms	Affected: >= 0.10.0, < 0.10.2

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-21444",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-01-05T20:30:19.842839Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-01-05T20:37:42.203Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "libtpms",
          "vendor": "stefanberger",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 0.10.0, \u003c 0.10.2"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "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."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "LOCAL",
            "availabilityImpact": "NONE",
            "baseScore": 5.5,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "NONE",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-327",
              "description": "CWE-327: Use of a Broken or Risky Cryptographic Algorithm",
              "lang": "en",
              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-330",
              "description": "CWE-330: Use of Insufficiently Random Values",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-01-02T19:05:31.503Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/stefanberger/libtpms/security/advisories/GHSA-7jxr-4j3g-p34f",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/stefanberger/libtpms/security/advisories/GHSA-7jxr-4j3g-p34f"
        },
        {
          "name": "https://github.com/stefanberger/libtpms/issues/541",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/stefanberger/libtpms/issues/541"
        },
        {
          "name": "https://github.com/stefanberger/libtpms/commit/33c9ff074cb16c1841ce7d7f33643c17c426743a",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/stefanberger/libtpms/commit/33c9ff074cb16c1841ce7d7f33643c17c426743a"
        }
      ],
      "source": {
        "advisory": "GHSA-7jxr-4j3g-p34f",
        "discovery": "UNKNOWN"
      },
      "title": "libtpms returns wrong initialization vector when certain symmetric ciphers are used"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-21444",
    "datePublished": "2026-01-02T19:05:31.503Z",
    "dateReserved": "2025-12-29T03:00:29.276Z",
    "dateUpdated": "2026-01-05T20:37:42.203Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.