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Vulnerability of WebKitGTK: use after free via Web Content

Synthesis of the vulnerability 

An attacker can force the usage of a freed memory area via Web Content of WebKitGTK, in order to trigger a denial of service, and possibly to run code.
Vulnerable systems: Debian, Fedora, openSUSE Leap, Solaris, RHEL, SUSE Linux Enterprise Desktop, SLES, Ubuntu, Unix (platform) ~ not comprehensive, WebKit Original.
Severity of this threat: 2/4.
Creation date: 17/04/2020.
Références of this weakness: CVE-2020-11793, DSA-4658-1, FEDORA-2020-11b0f45883, FEDORA-2020-4832f2bd62, openSUSE-SU-2020:0602-1, RHSA-2020:4035-01, SUSE-SU-2020:1109-1, SUSE-SU-2020:1135-1, USN-4331-1, VIGILANCE-VUL-32054, WSA-2020-0004.

Description of the vulnerability 

An attacker can force the usage of a freed memory area via Web Content of WebKitGTK, in order to trigger a denial of service, and possibly to run code.
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This cybersecurity threat impacts software or systems such as Debian, Fedora, openSUSE Leap, Solaris, RHEL, SUSE Linux Enterprise Desktop, SLES, Ubuntu, Unix (platform) ~ not comprehensive, WebKit Original.

Our Vigil@nce team determined that the severity of this computer threat note 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 security threat.

Solutions for this threat 

WebKitGTK, WPE WebKit: version 2.28.1.
The version 2.28.1 is fixed:
  https://webkitgtk.org/
  https://wpewebkit.org/

Debian 10: new webkit2gtk packages.
New packages are available:
  Debian 10: webkit2gtk 2.26.4-1~deb10u3

Fedora 30, 31: new webkit2gtk3 packages.
New packages are available:
  Fedora 30: webkit2gtk3 2.28.1-3.fc30
  Fedora 31: webkit2gtk3 2.28.1-3.fc31

openSUSE Leap 15.1: new webkit2gtk3 packages.
New packages are available:
  openSUSE Leap 15.1: webkit2gtk3 2.28.1-lp151.2.15.2

Oracle Solaris: patch for third party software of July 2020 v2.
A patch is available:
  https://support.oracle.com/rs?type=doc&id=1448883.1

RHEL 7.8: new webkitgtk4 packages.
New packages are available:
  RHEL 7.0-7.8: webkitgtk4 2.28.2-2.el7

SUSE LE 12: new webkit2gtk3 packages.
New packages are available, as indicated in information sources.

SUSE LE 15: new webkit2gtk3 packages.
New packages are available:
  SUSE LE 15 RTM: libjavascriptcoregtk-4_0-18 2.28.1-3.49.2, libwebkit2gtk-4_0-37 2.28.1-3.49.2

Ubuntu: new webkit2gtk packages.
New packages are available:
  Ubuntu 19.10: libjavascriptcoregtk-4.0-18 2.28.1-0ubuntu0.19.10.1, libwebkit2gtk-4.0-37 2.28.1-0ubuntu0.19.10.1
  Ubuntu 18.04 LTS: libjavascriptcoregtk-4.0-18 2.28.1-0ubuntu0.18.04.1, libwebkit2gtk-4.0-37 2.28.1-0ubuntu0.18.04.1
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