CVE-2021-22173

Name: CVE-2021-22173
Creator: NVD / NIST
Published: 2021-02-17T15:15:13.14+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 2.41%

Last modified Jun 17, 2026

CVE-2021-22173 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. Memory leak in USB HID dissector in Wireshark 3.4.0 to 3.4.2 allows denial of service via packet injection or crafted capture file. EPSS estimates a 2.41% chance of exploitation in the next 30 days.

Description

Memory leak in USB HID dissector in Wireshark 3.4.0 to 3.4.2 allows denial of service via packet injection or crafted capture file

Metrics

CVSS 3.1

7.5/10

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

EPSS Probability

2.41%

82.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-401

Affected Software

Vendor	Product	Versions
Wireshark	Wireshark	>= 3.4.0, < 3.4.3
Fedoraproject	Fedora	32
Fedoraproject	Fedora	33
Oracle	Zfs Storage Appliance	8.8

References

https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-22173.jsonThird Party Advisory
https://gitlab.com/wireshark/wireshark/-/issues/17124Exploit, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GND3PIQC3KZALR227V4YUMPKJBA5BZG4/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NYXLKQJ3D632XSG6VO7M4YFDAG6GRCLY/
https://security.gentoo.org/glsa/202107-21Third Party Advisory
https://www.oracle.com/security-alerts/cpuApr2021.htmlPatch, Third Party Advisory
https://www.wireshark.org/security/wnpa-sec-2021-01.htmlVendor Advisory
https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-22173.jsonThird Party Advisory
https://gitlab.com/wireshark/wireshark/-/issues/17124Exploit, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GND3PIQC3KZALR227V4YUMPKJBA5BZG4/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NYXLKQJ3D632XSG6VO7M4YFDAG6GRCLY/
https://security.gentoo.org/glsa/202107-21Third Party Advisory
https://www.oracle.com/security-alerts/cpuApr2021.htmlPatch, Third Party Advisory
https://www.wireshark.org/security/wnpa-sec-2021-01.htmlVendor Advisory

Timeline

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

Frequently Asked Questions

What is CVE-2021-22173?

Memory leak in USB HID dissector in Wireshark 3.4.0 to 3.4.2 allows denial of service via packet injection or crafted capture file

How severe is CVE-2021-22173?

CVE-2021-22173 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 2.41% probability of exploitation in the next 30 days.

How do I fix CVE-2021-22173?

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-2021-22173?

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

Scan your code now

Source: NVD / NIST