# CVE-2021-3623: libtpms: A flaw was found in libtpms

CVE-2021-3623 is fixed in libtpms on 1 platform, first by DEBIAN-CVE-2021-3623, released March 2, 2022. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2021-3623
- Priority: Routine
- CVSS: 6.1 (medium)
- EPSS: 0.0032
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Mar 2, 2022

## Description

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 volatile state of the TPM 2 is marshalled/written or unmarshalled/read. The highest threat from this vulnerability is to system availability.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | libtpms Debian 12.15 (bookworm) | 0.9.1-1 | [DEBIAN-CVE-2021-3623](https://patchblox.com/security/data/fix/linux/debian-cve-2021-3623.md) | Mar 2, 2022 |
| Linux | libtpms Debian 13.5 (trixie) | 0.9.1-1 | [DEBIAN-CVE-2021-3623](https://patchblox.com/security/data/fix/linux/debian-cve-2021-3623.md) | Mar 2, 2022 |
| Linux | libtpms Debian 14 | 0.9.1-1 | [DEBIAN-CVE-2021-3623](https://patchblox.com/security/data/fix/linux/debian-cve-2021-3623.md) | Mar 2, 2022 |

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Data as of 2026-11-08T13:06:02Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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