CVE-2021-21779

A use-after-free vulnerability exists in the way Webkit’s GraphicsContext handles certain events in WebKitGTK 2.30.4. A specially crafted web page can lead to a potential information leak and further memory corruption. A victim must be tricked into visiting a malicious web page to trigger this vulnerability.

• CWE-416
• CWE-416

• http://www.openwall.com/lists/oss-security/2021/07/23/1Mailing List
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/KYMMBQN4PRVDLMIJT2LY2BWHLYBD57P3/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/V4QORERLPDN3UNNJFJSOMHZZCU2G75Q6/
• https://talosintelligence.com/vulnerability_reports/TALOS-2021-1238Exploit, Third Party Advisory
• https://www.debian.org/security/2021/dsa-4945Third Party Advisory
• http://www.openwall.com/lists/oss-security/2021/07/23/1Mailing List
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/KYMMBQN4PRVDLMIJT2LY2BWHLYBD57P3/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/V4QORERLPDN3UNNJFJSOMHZZCU2G75Q6/
• https://talosintelligence.com/vulnerability_reports/TALOS-2021-1238Exploit, Third Party Advisory
• https://www.debian.org/security/2021/dsa-4945Third Party Advisory

Published

Jul 8, 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.
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