What’s Vulnerable › Vulnerabilities

CVE-2021-22173

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.4% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2021-02-17 · updated 2026-06-17
• Weakness: CWE-401

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

Affected products

• Fedoraproject Fedora: 32, 33
• Oracle Zfs Storage Appliance: 8.8
• Wireshark Foundation Wireshark: from 3.4.0 before 3.4.3 — fixed in 3.4.3

How to fix

Upgrade to a fixed version: Wireshark Foundation Wireshark 3.4.3. Check the vendor advisory for mitigations.

References

• https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-22173.json
• https://gitlab.com/wireshark/wireshark/-/issues/17124
• 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/202107-21
• https://www.oracle.com/security-alerts/cpuApr2021.html
• https://www.wireshark.org/security/wnpa-sec-2021-01.html
• https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-22173.json
• https://gitlab.com/wireshark/wireshark/-/issues/17124
• 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/202107-21

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