Libtpms is a software TPM (Trusted Platform Module) emulation library embedded in virtualization and container platforms to provide cryptographic functionality and secure boot attestation to guest systems. Despite its narrow product scope, the library's role in the virtualization supply chain gives it broad indirect reach across many hypervisor-based deployments. The recurring vulnerabilities affecting the library center on memory-safety and cryptographic-algorithm issues, including out-of-bounds writes, buffer overflows, and the use of weak or insufficient randomness in cryptographic operations, which reflect the low-level nature of TPM emulation code. Current severity, exploitation activity, and exposure counts are shown alongside this summary.
The number and severity of CVEs published that impact products developed by Libtpms Project over time
Signals from CVEs in this vendor scope (7 CVEs).
7 CVEs · Highest risk first
| CVE | Published | CVSS | Risk | KEV | Exploit |
|---|---|---|---|---|---|
CVE-2026-21444MEDIUM 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. | Jan 2, 2026 | 5.5 | 22 | NO | NO |
CVE-2021-3623MEDIUM A flaw was found in libtpms. The flaw can be triggered by specially-crafted TPM 2 command packets containing illegal values and may lead to an out-of-bounds access when the volatil | Mar 2, 2022 | 6.1 | 22 | NO | NO |
CVE-2021-3746MEDIUM A flaw was found in the libtpms code that may cause access beyond the boundary of internal buffers. The vulnerability is triggered by specially-crafted TPM2 command packets that th | Oct 19, 2021 | 6.5 | 22 | NO | NO |
CVE-2021-3569MEDIUM A stack corruption bug was found in libtpms in versions before 0.7.2 and before 0.8.0 while decrypting data using RSA. This flaw could result in a SIGBUS (bad memory access) and te | Jun 3, 2021 | 5.5 | 20 | NO | NO |
CVE-2021-3446MEDIUM A flaw was found in libtpms in versions before 0.8.2. The commonly used integration of libtpms with OpenSSL contained a vulnerability related to the returned IV (initialization vec | Mar 25, 2021 | 5.5 | 20 | NO | NO |
CVE-2025-49133MEDIUM 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 co | Jun 10, 2025 | 5.5 | 18 | NO | NO |
CVE-2021-3505MEDIUM A flaw was found in libtpms in versions before 0.8.0. The TPM 2 implementation returns 2048 bit keys with ~1984 bit strength due to a bug in the TCG specification. The bug is in th | Apr 19, 2021 | 5.5 | 16 | NO | NO |
Signals from CVEs in this vendor scope (7 CVEs).
An overview of all social media posts that mention a CVE ID that affects a product developed by Libtpms Project.
Media articles that mention a CVE ID that affects a product developed by Libtpms Project — matched by CVE ID, not by vendor name.