Vulnerability 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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Libtpms Project | Libtpms | >= 0.10.0, < 0.10.2 |
Related Weaknesses (CWE)
References
- https://github.com/stefanberger/libtpms/commit/33c9ff074cb16c1841ce7d7f33643c17cPatch
- https://github.com/stefanberger/libtpms/issues/541ExploitIssue Tracking
- https://github.com/stefanberger/libtpms/security/advisories/GHSA-7jxr-4j3g-p34fPatchVendor Advisory
FAQ
What is CVE-2026-21444?
CVE-2026-21444 is a vulnerability with a CVSS score of 5.5 (MEDIUM). 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 vulner...
How severe is CVE-2026-21444?
CVE-2026-21444 has been rated MEDIUM with a CVSS base score of 5.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-21444?
Check the references section above for vendor advisories and patch information. Affected products include: Libtpms Project Libtpms.