8.8
CWE
416 787
Advisory Published
CVE Published
Updated

CVE-2020-6463: Use After Free

First published: Tue Apr 21 2020(Updated: )

Crafted media files could lead to a race in texture caches, resulting in a use-after-free, memory corruption, and a potentially exploitable crash.

Credit: chrome-cve-admin@google.com chrome-cve-admin@google.com

Affected SoftwareAffected VersionHow to fix
Mozilla Firefox ESR<68.11
68.11
Google Chrome<81.0.4044.122
Fedoraproject Fedora=31
Fedoraproject Fedora=32
Canonical Ubuntu Linux=16.04
Canonical Ubuntu Linux=18.04
Canonical Ubuntu Linux=20.04
Debian Debian Linux=9.0
Debian Debian Linux=10.0
openSUSE Backports SLE=15.0-sp1
openSUSE Leap=15.1
openSUSE Leap=15.2
Google Chrome<81.0.4044.122
81.0.4044.122
Mozilla Firefox ESR<78.1
78.1
Mozilla Thunderbird<78.1
78.1
Mozilla Thunderbird<68.11
68.11
Mozilla Firefox<79
79
debian/chromium
120.0.6099.224-1~deb11u1
128.0.6613.84-1~deb12u1
130.0.6723.69-1~deb12u1
129.0.6668.89-1
130.0.6723.69-1
debian/firefox
132.0-1
debian/firefox-esr
115.14.0esr-1~deb11u1
128.4.0esr-1~deb11u1
115.14.0esr-1~deb12u1
128.4.0esr-1~deb12u1
128.3.1esr-2
128.4.0esr-1
debian/thunderbird
1:115.12.0-1~deb11u1
1:115.16.0esr-1~deb11u1
1:115.12.0-1~deb12u1
1:115.16.0esr-1~deb12u1
1:128.3.2esr-1
1:128.4.0esr-1

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Reference Links

Parent vulnerabilities

(Appears in the following advisories)

Frequently Asked Questions

  • What is CVE-2020-6463?

    CVE-2020-6463 is a vulnerability in Mozilla Firefox and Thunderbird that could lead to a use-after-free memory corruption and a potentially exploitable crash.

  • How severe is CVE-2020-6463?

    CVE-2020-6463 has a medium severity rating.

  • Which software is affected by CVE-2020-6463?

    Mozilla Firefox ESR versions up to 68.11, Thunderbird versions up to 68.11, Firefox versions up to 79, Firefox ESR versions up to 78.1, and Thunderbird versions up to 78.1 are affected.

  • How can CVE-2020-6463 be exploited?

    CVE-2020-6463 can be exploited using crafted media files that lead to a race in texture caches.

  • How can I fix CVE-2020-6463?

    To fix CVE-2020-6463, users should update Mozilla Firefox and Thunderbird to the recommended versions.

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