CVE-2020-6807

HIGH

Firefox < 74.0 and Firefox ESR < 68.6.0 - Use-After-Free via Stream Reinitialization

Title source: llm
STIX 2.1

Description

When a device was changed while a stream was about to be destroyed, the <code>stream-reinit</code> task may have been executed after the stream was destroyed, causing a use-after-free and a potentially exploitable crash. This vulnerability affects Thunderbird < 68.6, Firefox < 74, Firefox < ESR68.6, and Firefox ESR < 68.6.

References (6)

Core 6
Core References
Issue Tracking, Permissions Required x_refsource_misc
https://bugzilla.mozilla.org/show_bug.cgi?id=1614971
Third Party Advisory vendor-advisory x_refsource_ubuntu
https://usn.ubuntu.com/4328-1/
Third Party Advisory vendor-advisory x_refsource_ubuntu
https://usn.ubuntu.com/4335-1/

Scores

CVSS v3 8.8
EPSS 0.0079
EPSS Percentile 74.0%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Details

CWE
CWE-416
Status published
Products (6)
canonical/ubuntu_linux 16.04
canonical/ubuntu_linux 18.04
canonical/ubuntu_linux 19.10
mozilla/firefox < 74.0
mozilla/firefox_esr < 68.6.0
mozilla/thunderbird < 68.6.0
Published Mar 25, 2020
Tracked Since Feb 18, 2026