CVE-2021-39922

Buffer overflow in the C12.22 dissector in Wireshark 3.4.0 to 3.4.9 and 3.2.0 to 3.2.17 allows denial of service via packet injection or crafted capture file

• CWE-120

• https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-39922.jsonThird Party Advisory
• https://gitlab.com/wireshark/wireshark/-/issues/17636Exploit, Issue Tracking, Patch, 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/A6AJFIYIHS3TYDD2EBYBJ5KKE52X34BJ/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YEWTIRMC2MFQBZ2O5M4CJHJM4JPBHLXH/
• https://security.gentoo.org/glsa/202210-04Third Party Advisory
• https://www.debian.org/security/2021/dsa-5019Third Party Advisory
• https://www.wireshark.org/security/wnpa-sec-2021-12.htmlVendor Advisory
• https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-39922.jsonThird Party Advisory
• https://gitlab.com/wireshark/wireshark/-/issues/17636Exploit, Issue Tracking, Patch, 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/A6AJFIYIHS3TYDD2EBYBJ5KKE52X34BJ/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YEWTIRMC2MFQBZ2O5M4CJHJM4JPBHLXH/
• https://security.gentoo.org/glsa/202210-04Third Party Advisory
• https://www.debian.org/security/2021/dsa-5019Third Party Advisory
• https://www.wireshark.org/security/wnpa-sec-2021-12.htmlVendor Advisory

Published

Nov 19, 2021

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
• Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
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