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.
www.openwall.com/lists/oss-security/2021/07/23/1
lists.fedoraproject.org/archives/list/[email protected]/message/KYMMBQN4PRVDLMIJT2LY2BWHLYBD57P3/
lists.fedoraproject.org/archives/list/[email protected]/message/V4QORERLPDN3UNNJFJSOMHZZCU2G75Q6/
talosintelligence.com/vulnerability_reports/TALOS-2021-1238
www.debian.org/security/2021/dsa-4945