CVE-2020-6801: High severity Mozilla Firefox vulnerability
Last updated 25 August 2025
Other sources
Mozilla developers Jason Kratzer, Tyson Smith, and Christian Holler reported memory safety bugs present in Firefox 72. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code.
Mozilla developers reported memory safety bugs present in Firefox 72. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Firefox < 73.
— Launchpad
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
Firefoxto a version that resolves this vulnerability.Fixed in 73 - Upgrade
Upgrade
debian/firefoxto a version that resolves this vulnerability.Fixed in 152.0.6-1 - Upgrade
Upgrade
Mozilla Firefoxto a version that resolves this vulnerability.Fixed in 73
Event History
Peer vulnerabilities
Found alongside the following vulnerabilities.
Frequently Asked Questions
What is the severity of CVE-2020-6801?
The severity of CVE-2020-6801 is high, with a severity value of 8.8.
How can CVE-2020-6801 be exploited?
CVE-2020-6801 could be exploited to run arbitrary code.
Which software is affected by CVE-2020-6801?
Mozilla Firefox versions up to and excluding 73.0, Debian Firefox version 118.0.2-1, Ubuntu Firefox versions 73.0+ (bionic and eoan), and Ubuntu Firefox versions up to and excluding 73.0 (upstream and xenial) are affected by CVE-2020-6801.
What is the remedy for CVE-2020-6801 in Mozilla Firefox?
The remedy for CVE-2020-6801 in Mozilla Firefox is to update to version 73 or later.
Where can I find more information about CVE-2020-6801?
More information about CVE-2020-6801 can be found at the following references: [Bugzilla](https://bugzilla.mozilla.org/buglist.cgi?bug_id=1601024%2C1601712%2C1604836%2C1606492), [Mozilla Security Advisories](https://www.mozilla.org/en-US/security/advisories/mfsa2020-05/), [Ubuntu Security Notice](https://usn.ubuntu.com/4278-2/).