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CVE-2026-21444

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Date: January 2, 2026

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 Score

Severity Score

Weakness Type (CWE)

Use of a Broken or Risky Cryptographic Algorithm

CWE-327

Use of Insufficiently Random Values

CWE-330

Top Fix

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Upgrade Version

Upgrade to version https://github.com/stefanberger/libtpms.git - v0.10.2

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CVSS v3.1

Base Score:
Attack Vector (AV): LOCAL
Attack Complexity (AC): LOW
Privileges Required (PR): LOW
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): HIGH
Integrity (I): NONE
Availability (A): NONE

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