CVE-2021-22207

Name: CVE-2021-22207
Creator: NVD / NIST
Published: 2021-04-23T18:15:08.2+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.5/10EPSS 2.02%

Last modified Jun 17, 2026

CVE-2021-22207 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. Excessive memory consumption in MS-WSP dissector in Wireshark 3.4.0 to 3.4.4 and 3.2.0 to 3.2.12 allows denial of service via packet injection or crafted capture file. EPSS estimates a 2.02% chance of exploitation in the next 30 days.

Description

Excessive memory consumption in MS-WSP dissector in Wireshark 3.4.0 to 3.4.4 and 3.2.0 to 3.2.12 allows denial of service via packet injection or crafted capture file

Metrics

CVSS 3.1

6.5/10

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

EPSS Probability

2.02%

78.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-770

Affected Software

Vendor	Product	Versions
Wireshark	Wireshark	>= 3.2.0, <= 3.2.12
Wireshark	Wireshark	>= 3.4.0, <= 3.4.4
Fedoraproject	Fedora	33
Fedoraproject	Fedora	34
Oracle	Zfs Storage Appliance Kit	8.8
Debian	Debian Linux	9.0
Debian	Debian Linux	10.0
Debian	Debian Linux	11.0

References

https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-22207.jsonThird Party Advisory
https://gitlab.com/wireshark/wireshark/-/issues/17331Exploit, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2021/12/msg00015.htmlMailing List, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GIWWO27HV4HUKXV6NH6ULHCRAQB26DMD/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NL7ZTMMWIEPHHFK3ONRKATWE7CLIGLFD/
https://security.gentoo.org/glsa/202107-21Third Party Advisory
https://www.debian.org/security/2021/dsa-5019Third Party Advisory
https://www.oracle.com/security-alerts/cpuoct2021.htmlPatch, Third Party Advisory
https://www.wireshark.org/security/wnpa-sec-2021-04.htmlVendor Advisory
https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-22207.jsonThird Party Advisory
https://gitlab.com/wireshark/wireshark/-/issues/17331Exploit, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2021/12/msg00015.htmlMailing List, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GIWWO27HV4HUKXV6NH6ULHCRAQB26DMD/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NL7ZTMMWIEPHHFK3ONRKATWE7CLIGLFD/
https://security.gentoo.org/glsa/202107-21Third Party Advisory
https://www.debian.org/security/2021/dsa-5019Third Party Advisory
https://www.oracle.com/security-alerts/cpuoct2021.htmlPatch, Third Party Advisory
https://www.wireshark.org/security/wnpa-sec-2021-04.htmlVendor Advisory

Timeline

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

Frequently Asked Questions

What is CVE-2021-22207?

Excessive memory consumption in MS-WSP dissector in Wireshark 3.4.0 to 3.4.4 and 3.2.0 to 3.2.12 allows denial of service via packet injection or crafted capture file

How severe is CVE-2021-22207?

CVE-2021-22207 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 2.02% probability of exploitation in the next 30 days.

How do I fix CVE-2021-22207?

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-2021-22207?

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

Scan your code now

Source: NVD / NIST