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Vulnerabilities

Vulnerability · CVE-2025-49133

Libtpms is a library that targets the integration of TPM functionality into hypervisors, primarily into Qemu.

Published Jun 10, 2025 · catalog updated Nov 3, 2025 · Libtpms is a library

Check if you run it

No confirmed exploitation is on record for CVE-2025-49133. EPSS is 0.17%. Act only if a listed version of Libtpms is a library is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (Libtpms is a library).
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Medium5.9
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.17%
Remediation
Advisory link
Affected products
vendor stefanberger libtpms = 0.9.6

Libtpms is a library that targets the integration of TPM functionality into hypervisors, primarily into Qemu. Libtpms, which is derived from the TPM 2.0 reference implementation code published by the Trusted Computing Group, is prone to a potential out of bounds (OOB) read vulnerability. The vulnerability occurs in the ‘CryptHmacSign’ function with an inconsistent pairing of the signKey and signScheme parameters, where the signKey is ALG_KEYEDHASH key and inScheme is an ECC or RSA scheme. The reported vulnerability is in the ‘CryptHmacSign’ function, which is defined in the "Part 4: Supporting

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor stefanberger libtpms = 0.9.6= 0.9.6

How to fix CVE-2025-49133

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2025-49133. EPSS is 0.17%. Act only if a listed version of Libtpms is a library is installed.

Which versions are affected?

Compare what you have installed with stefanberger libtpms = 0.9.6 = 0.9.6. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 0.17%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Jun 10, 2025 · EUVD

    Detected

    Libtpms is a library that targets the integration of TPM functionality into hypervisors, primarily into Qemu. Libtpms, which is derived from the TPM 2.0 reference implementation code published by the Trusted Computing Group, is prone to a potential out of bounds (OOB) read vulnerability. The vulnerability occurs in the ‘CryptHmacSign’ function with an inconsistent pairing of the signKey and signSc

  2. Nov 3, 2025 · EUVD

    Updated

    Libtpms is a library that targets the integration of TPM functionality into hypervisors, primarily into Qemu. Libtpms, which is derived from the TPM 2.0 reference implementation code published by the Trusted Computing Group, is prone to a potential out of bounds (OOB) read vulnerability. The vulnerability occurs in the ‘CryptHmacSign’ function with an inconsistent pairing of the signKey and signSc

Sources

  • CVE.orgVulnerability recordCVE-2025-49133

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2025-49133

    30-day exploitation probability 0.2%

    first.org
  • EUVDVulnerability recordEUVD-2025-17819

    Libtpms is a library that targets the integration of TPM functionality into hypervisors, primarily into Qemu. Libtpms, which is derived from the TPM 2.0 reference implementation code published by the Trusted Computing Group, is prone to a potential out of bounds (OOB) read vulner

    euvd.enisa.europa.eu

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.