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LibtpmsApplication · Libtpms Project

CVE-2026-21444

MEDIUM · 5.5 CVSS v3.1 Published 2026-01-02
Fix available
A fix is available. Upgrade to 0.10.2 or later.
See remediation →
57/100
Remediation priority · Elevated
Public exploit Zero-click Patch available

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
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.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis

A detailed technical summary for this CVE is being prepared.

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
LibtpmsApplication
Affected:>= 0.10.0, < 0.10.2

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

dbcve · scoped
Upgrade available Upgrade to 0.10.2 or later
Fixed in 0.10.2
Vendor patch github.com →
Recommended fix High confidence

libtpms version 0.10.2

  1. 1. Identify the current installed version of libtpms using package manager or build system (e.g., dpkg -l | grep libtpms, rpm -qa | grep libtpms, or check build configuration)
  2. 2. Stop any services or applications that depend on libtpms to ensure a clean update process
  3. 3. Obtain libtpms version 0.10.2 or later from the official repository or distribution package manager
  4. 4. Install the new version using the appropriate method: for source builds, run ./configure && make && make install; for package managers, use apt-get update && apt-get install libtpms (or equivalent)
  5. 5. Verify the installed version matches 0.10.2 or higher using the same identification method from step 1
  6. 6. Restart any services or applications that use libtpms to load the updated library

Generated from the published advisory — verify against the referenced sources before acting.

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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2026-21444 in production — separate from our analysis above.

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  • Version or environment caveats, and links to real fixes
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