CVE-2021-4190

Large loop in the Kafka dissector in Wireshark 3.6.0 allows denial of service via packet injection or crafted capture file

Affected

Wireshark Foundation · Wireshark

CVSS v3.1 NVD

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

CVSS v2.0 NVD

5.0 MEDIUMAV:N/AC:L/Au:N/C:N/I:N/A:P

EPSS

3.10% chance of exploitation in the next 30 days, 88th percentile

Published

2021-12-30

Updated

2025-11-03

Proof-of-concept exploits (1)

• https://gitlab.com/wireshark/wireshark/-/issues/17811

Security advisories

• https://www.wireshark.org/security/wnpa-sec-2021-22.html
• https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-4190.json
• https://security.gentoo.org/glsa/202210-04

References

• CVE Record
• NVD entry