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

Vulnerability from cvelistv5 – Published: 2026-01-02 19:05 – Updated: 2026-01-05 20:37
VLAI
Title
libtpms returns wrong initialization vector when certain symmetric ciphers are used
Summary
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
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 CNA under the mitre root
CNA scorecard C 72/100 over 7886 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
stefanberger libtpms Affected: >= 0.10.0, < 0.10.2
guessed Create a notification for this product.
Show details on NVD website
To clipboard 

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