RHSA-2022:1702 — Security Advisory

Red Hat Security Advisory: firefox security update

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Severity

Important

Red Hat Product Security

RHEL 8

Products

Official CSAF product identity

Published · May 4, 2022

Updated · November 22, 2025

Topic

An update for firefox is now available for Red Hat Enterprise Linux 8.4 Extended Update Support.

Red Hat Product Security has rated this update as having a security impact of Important. 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 91.9.0 ESR.

Security Fix(es):

Mozilla: Bypassing permission prompt in nested browsing contexts (CVE-2022-29909)
Mozilla: iframe Sandbox bypass (CVE-2022-29911)
Mozilla: Fullscreen notification bypass using popups (CVE-2022-29914)
Mozilla: Leaking browser history with CSS variables (CVE-2022-29916)
Mozilla: Memory safety bugs fixed in Firefox 100 and Firefox ESR 91.9 (CVE-2022-29917)
Mozilla: Reader mode bypassed SameSite cookies (CVE-2022-29912)

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.