Debian DSA-4975-1 Critical: Webkit2gtk Arbitrary Execution Issue

The following vulnerabilities have been discovered in the webkit2gtk
web engine:

CVE-2021-30858
An anonymous researcher discovered that processing maliciously
crafted web content may lead to arbitrary code execution. Apple is
aware of a report that this issue may have been actively
exploited.

For the oldstable distribution (buster), this problem has been fixed
in version 2.32.4-1~deb10u1.

For the stable distribution (bullseye), this problem has been fixed in
version 2.32.4-1~deb11u1.

We recommend that you upgrade your webkit2gtk packages.

For the detailed security status of webkit2gtk please refer to
its security tracker page at:
https://security-tracker.debian.org/tracker/source-package/webkit2gtk

Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://www.debian.org/security/