CVE-2020-6807

HighCVSS 8.8/10Last modified Jun 17, 2026

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.

Metrics

CVSS 3.1 8.8/10CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-416

Affected software

No affected versions have been published.

Timeline

Published: Mar 25, 2020
Last modified: Jun 17, 2026
NVD status: Modified

Related CVEs from 2020

CVE-2020-68086.5When a JavaScript URL (javascript:) is evaluated and the result is a string, this string is parsed to create an HTML document, which is then CVE-2020-68097.5When a Web Extension had the all-urls permission and made a fetch request with a mode set to 'same-origin', it was possible for the Web Exte CVE-2020-68104.3After a website had entered fullscreen mode, it could have used a previously opened popup to obscure the notification that indicates the bro CVE-2020-68118.8The 'Copy as cURL' feature of Devtools' network tab did not properly escape the HTTP method of a request, which can be controlled by the web CVE-2020-68125.3The first time AirPods are connected to an iPhone, they become named after the user's name by default (e.g. Jane Doe's AirPods.) Websites wi CVE-2020-68135.3When protecting CSS blocks with the nonce feature of Content Security Policy, the @import statement in the CSS block could allow an attacker CVE-2020-68149.8Mozilla developers reported memory safety bugs present in Firefox and Thunderbird 68.5. Some of these bugs showed evidence of memory corrupt CVE-2020-68159.8Mozilla developers reported memory safety and script safety bugs present in Firefox 73. Some of these bugs showed evidence of memory corrupt CVE-2020-68166.1In Mozilla Bleach before 3.12, a mutation XSS in bleach.clean when RCDATA and either svg or math tags are whitelisted and the keyword argume CVE-2020-68177.5bleach.clean behavior parsing style attributes could result in a regular expression denial of service (ReDoS). Calls to bleach.clean with an CVE-2020-68198.1Under certain conditions, when running the nsDocShell destructor, a race condition can cause a use-after-free. We are aware of targeted atta CVE-2020-68208.1Under certain conditions, when handling a ReadableStream, a race condition can cause a use-after-free. We are aware of targeted attacks in t