CVE-2021-3622

Name: CVE-2021-3622
Creator: NVD / NIST
Published: 2021-12-23T21:15:08.97+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 4.3/10EPSS 4.79%

Last modified Jun 17, 2026

CVE-2021-3622 is a medium-severity vulnerability rated 4.3/10 on the CVSS scale. A flaw was found in the hivex library. This flaw allows an attacker to input a specially crafted Windows Registry (hive) file, which would cause hivex to recursively call the _get_children() function, leading to a stack overflow. EPSS estimates a 4.79% chance of exploitation in the next 30 days.

Description

A flaw was found in the hivex library. This flaw allows an attacker to input a specially crafted Windows Registry (hive) file, which would cause hivex to recursively call the _get_children() function, leading to a stack overflow. The highest threat from this vulnerability is to system availability.

Metrics

CVSS 3.1

4.3/10

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

EPSS Probability

4.79%

90.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-400

Affected Software

Vendor	Product	Versions
Redhat	Hivex	< 1.3.21
Redhat	Enterprise Linux	6.0
Redhat	Enterprise Linux	7.0
Redhat	Enterprise Linux	8.0
Redhat	Enterprise Linux Workstation	7.0
Fedoraproject	Fedora	33
Fedoraproject	Fedora	34

References

https://bugzilla.redhat.com/show_bug.cgi?id=1975489Exploit, Issue Tracking, Patch, Vendor Advisory
https://github.com/libguestfs/hivex/commit/771728218dac2fbf6997a7e53225e75a4c6b7255Patch, Third Party Advisory
https://listman.redhat.com/archives/libguestfs/2021-August/msg00002.htmlMailing List, Patch, Vendor Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/S35TVTAPHORSUIFYNFBHKLQRPVFUPXBE/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/USD4OEV6L3RPHE32V2MJ4JPFBODINWSU/
https://bugzilla.redhat.com/show_bug.cgi?id=1975489Exploit, Issue Tracking, Patch, Vendor Advisory
https://github.com/libguestfs/hivex/commit/771728218dac2fbf6997a7e53225e75a4c6b7255Patch, Third Party Advisory
https://listman.redhat.com/archives/libguestfs/2021-August/msg00002.htmlMailing List, Patch, Vendor Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/S35TVTAPHORSUIFYNFBHKLQRPVFUPXBE/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/USD4OEV6L3RPHE32V2MJ4JPFBODINWSU/

Timeline

Published: Dec 23, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-3622?

How severe is CVE-2021-3622?

CVE-2021-3622 has a CVSS score of 4.3/10 (MEDIUM severity). The EPSS model estimates a 4.79% probability of exploitation in the next 30 days.

How do I fix CVE-2021-3622?

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-2021-3622?

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

Scan your code now

Source: NVD / NIST