CVE-2020-24455

Name: CVE-2020-24455
Creator: NVD / NIST
Published: 2021-02-26T03:15:12.213+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.7/10EPSS 0.59%

Last modified Jun 17, 2026

CVE-2020-24455 is a medium-severity vulnerability rated 6.7/10 on the CVSS scale. Missing initialization of a variable in the TPM2 source may allow a privileged user to potentially enable an escalation of privilege via local access. This affects tpm2-tss before 3.0.1 and before 2.4.3.. EPSS estimates a 0.59% chance of exploitation in the next 30 days.

Description

Missing initialization of a variable in the TPM2 source may allow a privileged user to potentially enable an escalation of privilege via local access. This affects tpm2-tss before 3.0.1 and before 2.4.3.

Metrics

CVSS 3.1

6.7/10

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

EPSS Probability

0.59%

43.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-909

Affected Software

Vendor	Product	Versions
Tpm2 Software Stack Project	Tpm2 Software Stack	< 2.4.3
Tpm2 Software Stack Project	Tpm2 Software Stack	>= 3.0.0, < 3.0.1
Fedoraproject	Fedora	34

References

https://bugzilla.redhat.com/show_bug.cgi?id=1902167Issue Tracking, Patch, Third Party Advisory
https://github.com/tpm2-software/tpm2-tss/releases/tag/2.4.3Release Notes, Third Party Advisory
https://github.com/tpm2-software/tpm2-tss/releases/tag/3.0.1Release Notes, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/7KPOENCMJU4DMT3BDNUBRK25B3DJ47UO/
https://security.gentoo.org/glsa/202107-10Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1902167Issue Tracking, Patch, Third Party Advisory
https://github.com/tpm2-software/tpm2-tss/releases/tag/2.4.3Release Notes, Third Party Advisory
https://github.com/tpm2-software/tpm2-tss/releases/tag/3.0.1Release Notes, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/7KPOENCMJU4DMT3BDNUBRK25B3DJ47UO/
https://security.gentoo.org/glsa/202107-10Third Party Advisory

Timeline

Published: Feb 26, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-24455?

How severe is CVE-2020-24455?

CVE-2020-24455 has a CVSS score of 6.7/10 (MEDIUM severity). The EPSS model estimates a 0.59% probability of exploitation in the next 30 days.

How do I fix CVE-2020-24455?

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-2020-24455?

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

Scan your code now

Source: NVD / NIST