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Vulnerability of WebKitGTK, WPE WebKit: use after free

Synthesis of the vulnerability 

An attacker can force the usage of a freed memory area of WebKitGTK, WPE WebKit, in order to trigger a denial of service, and possibly to run code.
Impacted software: Debian, Fedora, openSUSE Leap, Solaris, SLES, Unix (platform) ~ not comprehensive, WebKit Original.
Severity of this computer vulnerability: 2/4.
Creation date: 24/11/2020.
Références of this announce: CVE-2020-13584, DSA-4797-1, DSA-4797-2, FEDORA-2020-145877bcd3, FEDORA-2020-e8a7566e80, openSUSE-SU-2020:2304-1, openSUSE-SU-2020:2310-1, SUSE-SU-2020:3864-1, SUSE-SU-2020:3867-1, VIGILANCE-VUL-33958, WSA-2020-0008.

Description of the vulnerability 

An attacker can force the usage of a freed memory area of WebKitGTK, WPE WebKit, in order to trigger a denial of service, and possibly to run code.
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This computer vulnerability announce impacts software or systems such as Debian, Fedora, openSUSE Leap, Solaris, SLES, Unix (platform) ~ not comprehensive, WebKit Original.

Our Vigil@nce team determined that the severity of this cybersecurity bulletin is medium.

The trust level is of type confirmed by the editor, with an origin of document.

An attacker with a expert ability can exploit this threat alert.

Solutions for this threat 

WebKitGTK, WPE WebKit: version 2.30.3.
The version 2.30.3 is fixed:
  https://webkitgtk.org/
  https://wpewebkit.org/

Debian 10: new webkit2gtk packages.
New packages are available:
  Debian 10: webkit2gtk 2.30.3-1~deb10u1

Fedora 32: new webkit2gtk3 packages.
New packages are available:
  Fedora 32: webkit2gtk3 2.30.3-1.fc32

Fedora 33: new webkit2gtk3 packages.
New packages are available:
  Fedora 33: webkit2gtk3 2.30.3-1.fc33

openSUSE Leap 15.1-15.2: new webkit2gtk3 packages.
New packages are available:
  openSUSE Leap 15.1: webkit2gtk3 2.30.3-lp151.2.28.2
  openSUSE Leap 15.2: webkit2gtk3 2.30.3-lp152.2.7.3

Oracle Solaris: patch for third party software of January 2021 v3.
A patch is available:
  https://support.oracle.com/rs?type=doc&id=1448883.1

SUSE LE 15 RTM-SP1: new webkit2gtk3 packages.
New packages are available:
  SUSE LE 15 RTM: webkit2gtk3 2.30.3-3.63.2
  SUSE LE 15 SP1: webkit2gtk3 2.30.3-3.63.2

SUSE LE 15 SP2: new webkit2gtk3 packages.
New packages are available:
  SUSE LE 15 SP2: webkit2gtk3 2.30.3-3.9.3
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