Vulnerability in libtpms Affects OpenSSL Integration
CVE-2026-21444

5.5MEDIUM

Key Information:

Vendor

Stefanberger

Status
Libtpms
Vendor
CVE Published:
2 January 2026

What is CVE-2026-21444?

libtpms, a software library for emulating Trusted Platform Modules, contains a vulnerability that affects its integration with OpenSSL 3.x in versions 0.10.0 and 0.10.1. The issue arises when certain symmetric ciphers are utilized; instead of providing the last used initialization vector (IV) for encryption, the library incorrectly returns the initial IV. This erroneous behavior compromises the integrity of the encryption and decryption processes, potentially exposing sensitive data. The flaw necessitates an upgrade to version 0.10.2, which addresses the reported issue, as no workarounds are available.

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Affected Version(s)

libtpms >= 0.10.0, < 0.10.2

References

https://github.com/stefanberger/libtpms/security/advisori...
x_refsource_CONFIRM
https://github.com/stefanberger/libtpms/issues/541
x_refsource_MISC
https://github.com/stefanberger/libtpms/commit/33c9ff074c...
x_refsource_MISC

CVSS V3.1

Score:
5.5
Severity:
MEDIUM
Confidentiality:
High
Integrity:
None
Availability:
High
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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