Vulnerability in Libtpms Project
CVE-2026-21444
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.
Vulnerability class: POODLE (CVE-2014-3566)
EPSS: 0.001 (0.0th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.
Affected products
- Libtpms_project Libtpms
- Stefanberger Libtpms — versions >= 0.10.0, < 0.10.2
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM, Patch, Vendor Advisory)
- security-advisories@github.com (Exploit, x_refsource_MISC, Issue Tracking)
- security-advisories@github.com (Patch, x_refsource_MISC)
Frequently asked questions
- What is CVE-2026-21444?
- CVE-2026-21444 is a medium-severity vulnerability in Libtpms Project, classified under Use of a Broken or Risky Cryptographic Algorithm. CVSS score: 5.5/10. Published 2026-01-02.
- How severe is CVE-2026-21444?
- Medium severity. CVSS v3 base score is 5.5 out of 10.