CVE-2021-3569

Name: CVE-2021-3569
Creator: NVD / NIST
Published: 2021-06-03T12:15:07.827+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.5/10EPSS 0.26%

Last modified Jun 17, 2026

CVE-2021-3569 is a medium-severity vulnerability rated 5.5/10 on the CVSS scale. 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. EPSS estimates a 0.26% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

5.5/10

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

EPSS Probability

0.26%

17.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Libtpms Project	Libtpms	< 0.7.2
Libtpms Project	Libtpms	>= 0.7.3, < 0.8.0
Redhat	Enterprise Linux	8.0

References

https://bugzilla.redhat.com/show_bug.cgi?id=1964358Issue Tracking, Patch, Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1964358Issue Tracking, Patch, Third Party Advisory

Timeline

Published: Jun 3, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-3569?

How severe is CVE-2021-3569?

CVE-2021-3569 has a CVSS score of 5.5/10 (MEDIUM severity). The EPSS model estimates a 0.26% probability of exploitation in the next 30 days.

How do I fix CVE-2021-3569?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-3569?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST