A use-after-free vulnerability exists in the way that WebKit GraphicsContext handles certain events. 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.
Created webkit2gtk3 tracking bugs for this issue:
Affects: fedora-all [bug 1986867]
Talos advisory with more details:
This issue has been addressed in the following products:
Red Hat Enterprise Linux 8
Via RHSA-2021:4381 https://access.redhat.com/errata/RHSA-2021:4381
This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):