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Vulnerability of ANGLE: use after free via gl-Texture-onUnbindAsSamplerTexture

Synthesis of the vulnerability 

An attacker can force the usage of a freed memory area via gl::Texture::onUnbindAsSamplerTexture() of ANGLE, in order to trigger a denial of service, and possibly to run code.
Vulnerable software: Debian, Fedora, Chrome, Edge Chromium, Firefox, openSUSE Leap, Opera, RHEL, Slackware, SUSE Linux Enterprise Desktop, SLES, Ubuntu.
Severity of this announce: 2/4.
Creation date: 30/07/2020.
Références of this computer vulnerability: ADV200002, CVE-2020-6463, DLA-2297-1, DLA-2310-1, DSA-4714-1, DSA-4714-2, DSA-4714-3, DSA-4736-1, DSA-4740-1, FEDORA-2020-0e7f1b663b, FEDORA-2020-da49fbb17c, MFSA2020-30, MFSA2020-31, MFSA2020-32, openSUSE-SU-2020:0604-1, openSUSE-SU-2020:0615-1, openSUSE-SU-2020:0635-1, openSUSE-SU-2020:0823-1, openSUSE-SU-2020:1147-1, openSUSE-SU-2020:1155-1, openSUSE-SU-2020:1179-1, openSUSE-SU-2020:1189-1, RHSA-2020:1970-01, RHSA-2020:3229-01, RHSA-2020:3233-01, RHSA-2020:3241-01, RHSA-2020:3253-01, RHSA-2020:3254-01, RHSA-2020:3341-01, RHSA-2020:3342-01, RHSA-2020:3343-01, RHSA-2020:3344-01, RHSA-2020:3345-01, SSA:2020-209-01, SSA:2020-213-01, SUSE-SU-2020:2100-1, SUSE-SU-2020:2118-1, SUSE-SU-2020:2147-1, SUSE-SU-2020:2179-1, USN-4443-1, VIGILANCE-VUL-32959.

Description of the vulnerability 

An attacker can force the usage of a freed memory area via gl::Texture::onUnbind...
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This computer weakness alert impacts software or systems such as Debian, Fedora, Chrome, Edge Chromium, Firefox, openSUSE Leap, Opera, RHEL, Slackware, SUSE Linux Enterprise Desktop, SLES, Ubuntu.

Our Vigil@nce team determined that the severity of this weakness 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 weakness bulletin.

Solutions for this threat 

Solutions for this vulnerability are not yet public.
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