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.
Advisories

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Fixes

Solution

No solution given by the vendor.


Workaround

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History

Tue, 06 Jan 2026 00:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Sat, 03 Jan 2026 00:15:00 +0000

Type Values Removed Values Added
References
Metrics threat_severity

None

threat_severity

Moderate


Fri, 02 Jan 2026 19:15:00 +0000

Type Values Removed Values Added
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.
Title libtpms returns wrong initialization vector when certain symmetric ciphers are used
Weaknesses CWE-327
CWE-330
References
Metrics cvssV3_1

{'score': 5.5, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-01-05T20:37:42.203Z

Reserved: 2025-12-29T03:00:29.276Z

Link: CVE-2026-21444

cve-icon Vulnrichment

Updated: 2026-01-05T20:30:20.466Z

cve-icon NVD

Status : Received

Published: 2026-01-02T19:15:48.763

Modified: 2026-01-02T19:15:48.763

Link: CVE-2026-21444

cve-icon Redhat

Severity : Moderate

Publid Date: 2026-01-02T19:05:31Z

Links: CVE-2026-21444 - Bugzilla

cve-icon OpenCVE Enrichment

No data.

Weaknesses