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 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.
https://bodhi.fedoraproject.org/updates/FEDORA-2025-db606660bd
This issue has been addressed in the following products: Red Hat Enterprise Linux 9 Via RHSA-2025:12100 https://access.redhat.com/errata/RHSA-2025:12100
This issue has been addressed in the following products: Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions Via RHSA-2025:12112 https://access.redhat.com/errata/RHSA-2025:12112
This issue has been addressed in the following products: Red Hat Enterprise Linux 9.4 Extended Update Support Via RHSA-2025:12111 https://access.redhat.com/errata/RHSA-2025:12111
This issue has been addressed in the following products: Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support Red Hat Enterprise Linux 8.6 Telecommunications Update Service Via RHSA-2025:12234 https://access.redhat.com/errata/RHSA-2025:12234
This issue has been addressed in the following products: Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions Red Hat Enterprise Linux 8.8 Telecommunications Update Service Via RHSA-2025:12293 https://access.redhat.com/errata/RHSA-2025:12293
This issue has been addressed in the following products: Red Hat Enterprise Linux 8 Via RHSA-2025:12527 https://access.redhat.com/errata/RHSA-2025:12527
This issue has been addressed in the following products: Red Hat Enterprise Linux 10 Via RHSA-2025:16428 https://access.redhat.com/errata/RHSA-2025:16428