| Name | CVE-2021-21779 |
| Description | 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. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| References | DSA-4945-1 |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| webkit2gtk (PTS) | jessie | 2.6.2+dfsg1-4 | vulnerable |
| stretch | 2.18.6-1~deb9u1 | vulnerable |
| buster (security), buster, buster (lts) | 2.38.6-0+deb10u1 | fixed |
| bullseye | 2.44.2-1~deb11u1 | fixed |
| bullseye (security) | 2.46.3-1~deb11u2 | fixed |
| bookworm | 2.46.0-2~deb12u1 | fixed |
| bookworm (security) | 2.46.3-1~deb12u1 | fixed |
| sid, trixie | 2.46.3-1 | fixed |
| wpewebkit (PTS) | bullseye (security), bullseye | 2.38.6-1~deb11u1 | fixed |
| bookworm | 2.38.6-1 | fixed |
| sid, trixie | 2.46.3-1 | fixed |
The information below is based on the following data on fixed versions.
Notes
[bullseye] - webkit2gtk <postponed> (Fix along with next update round)
[buster] - webkit2gtk <postponed> (Fix along with next update round)
[stretch] - webkit2gtk <ignored> (Not covered by security support in stretch)
[bullseye] - wpewebkit <postponed> (Minor issue, fix along with next update)
https://talosintelligence.com/vulnerability_reports/TALOS-2021-1238