CVE-2021-3623: Fedoraproject Fedora

Medium severity, CVSS 6.1. EPSS: 0.3% chance of exploitation in the next 30 days.

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.

Affected products

• Fedoraproject Fedora: version 34 only
• Libtpms Project Libtpms: before 0.6.5 (fixed in 0.6.5); from 0.7.0, before 0.7.8 (fixed in 0.7.8); from 0.8.0, before 0.8.4 (fixed in 0.8.4)
• Red Hat Enterprise Linux: version 8.0 only

Published 2022-03-02. Last modified 2026-06-17.