CVE-2025-49133

NameCVE-2025-49133
DescriptionLibtpms 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 Routines – Code" document, section "7.151 - /tpm/src/crypt/CryptUtil.c ". This vulnerability can be triggered from user-mode applications by sending malicious commands to a TPM 2.0/vTPM (swtpm) whose firmware is based on an affected TCG reference implementation. The effect on libtpms is that it will cause an abort due to the detection of the out-of-bounds access, thus for example making a vTPM (swtpm) unavailable to a VM. This vulnerability is fixed in 0.7.12, 0.8.10, 0.9.7, and 0.10.1.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
Debian Bugs1107617

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
libtpms (PTS)bookworm0.9.2-3.1vulnerable
bookworm (security)0.9.2-3.1~deb12u1vulnerable
sid, trixie0.9.2-3.2fixed

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
libtpmssource(unstable)0.9.2-3.21107617

Notes

[bookworm] - libtpms <no-dsa> (Minor issue)
Fixed by: https://github.com/stefanberger/libtpms/commit/9f9baccdba9cd3fc32f1355613abd094b21f7ba0 (v0.9.7)

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