Debian Security Advisory

DLA-2448-1 firefox-esr -- LTS security update

Date Reported:
11 Nov 2020
Affected Packages:
Security database references:
In Mitre's CVE dictionary: CVE-2020-26950.
More information:

A use-after-free was found in the Mozilla Firefox web browser, which could potentially result in the execution of arbitrary code.

For Debian 9 stretch, this problem has been fixed in version 78.4.1esr-1~deb9u1.

We recommend that you upgrade your firefox-esr packages.

For the detailed security status of firefox-esr please refer to its security tracker page at:

Further information about Debian LTS security advisories, how to apply these updates to your system and frequently asked questions can be found at: