CVE-2021-20204

Name: CVE-2021-20204
Creator: NVD / NIST
Published: 2021-05-06T15:15:07.907+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 2.16%

Last modified Jun 17, 2026

CVE-2021-20204 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. A heap memory corruption problem (use after free) can be triggered in libgetdata v0.10.0 when processing maliciously crafted dirfile databases. This degrades the confidentiality, integrity and availability of third-party software that uses libgetdata as a library. EPSS estimates a 2.16% chance of exploitation in the next 30 days.

Description

A heap memory corruption problem (use after free) can be triggered in libgetdata v0.10.0 when processing maliciously crafted dirfile databases. This degrades the confidentiality, integrity and availability of third-party software that uses libgetdata as a library. This vulnerability may lead to arbitrary code execution or privilege escalation depending on input/skills of attacker.

Metrics

CVSS 3.1

9.8/10

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

EPSS Probability

2.16%

79.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Getdata Project	Getdata	0.10.0
Debian	Debian Linux	9.0
Fedoraproject	Fedora	33
Fedoraproject	Fedora	34
Fedoraproject	Fedora	35

References

https://bugzilla.redhat.com/show_bug.cgi?id=1956348Issue Tracking, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2021/05/msg00015.htmlMailing List, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/43JTGEMYMCTHD3LHFD7ENBNSWCNBCYEY/Mailing List, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GB7T7DW7XRPJOUE25ZE7GF244FPCHBWY/Mailing List, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OE23HBLIVKVPOQ5MVADWPOCFMREVF4QZ/Mailing List, Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1956348Issue Tracking, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2021/05/msg00015.htmlMailing List, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/43JTGEMYMCTHD3LHFD7ENBNSWCNBCYEY/Mailing List, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GB7T7DW7XRPJOUE25ZE7GF244FPCHBWY/Mailing List, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OE23HBLIVKVPOQ5MVADWPOCFMREVF4QZ/Mailing List, Third Party Advisory

Timeline

Published: May 6, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-20204?

How severe is CVE-2021-20204?

CVE-2021-20204 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 2.16% probability of exploitation in the next 30 days.

How do I fix CVE-2021-20204?

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-2021-20204?

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

Scan your code now

Source: NVD / NIST