What’s Vulnerable › Vulnerabilities

CVE-2021-3569

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-06-03 · updated 2026-06-17
• Weakness: CWE-120

Description

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 termination of swtpm. The highest threat from this vulnerability is to system availability.

Affected products

• stefanberger libtpms: before 0.7.2; from 0.7.3 before 0.8.0 — fixed in 0.7.2, 0.8.0
• Red Hat Enterprise Linux: 8.0

How to fix

Upgrade to a fixed version: stefanberger libtpms 0.7.2, 0.8.0. Check the vendor advisory for mitigations.

References

• https://bugzilla.redhat.com/show_bug.cgi?id=1964358
• https://bugzilla.redhat.com/show_bug.cgi?id=1964358

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