RHSA-2021:0055 — Security Advisory
Red Hat Security Advisory: firefox security update
Severity
CriticalRed Hat Product Security
Products
Official CSAF product identity
Published · January 11, 2021
Updated · November 22, 2025
Topic
An update for firefox is now available for Red Hat Enterprise Linux 8.2 Extended Update Support.
Red Hat Product Security has rated this update as having a security impact of Critical. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.
Description
Mozilla Firefox is an open-source web browser, designed for standards compliance, performance, and portability.
This update upgrades Firefox to version 78.6.1 ESR.
Security Fix(es):
- Mozilla: Use-after-free write when handling a malicious COOKIE-ECHO SCTP chunk (CVE-2020-16044)
For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.