Debian Security Advisory

DSA-5237-1 firefox-esr -- security update

Date Reported:
23 Sep 2022
Affected Packages:
Security database references:
In Mitre's CVE dictionary: CVE-2022-40956, CVE-2022-40957, CVE-2022-40958, CVE-2022-40959, CVE-2022-40960, CVE-2022-40962.
More information:

Multiple security issues have been found in the Mozilla Firefox web browser, which could potentially result in the execution of arbitrary code, CSP bypass or session fixation.

Debian follows the extended support releases (ESR) of Firefox. Support for the 91.x series has ended, so starting with this update we're now following the 102.x releases.

Between 91.x and 102.x, Firefox has seen a number of feature updates. For more information please refer to

For the stable distribution (bullseye), these problems have been fixed in version 102.3.0esr-1~deb11u1.

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: