Red Hat Product Errata RHSA-2026:22712 - Security Advisory Issued: 2026-06-03 Updated: 2026-06-03 RHSA-2026:22712 - Security Advisory Overview Updated Packages Synopsis Important: firefox security update Type/Severity Security Advisory: Important Red Hat Lightspeed patch analysis Identify and remediate systems affected by this advisory. View affected systems Topic An update for firefox is now available for Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support and Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On. 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. Security Fix(es): firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 140.10.1 and Firefox 150.0.1 (CVE-2026-7323) firefox: thunderbird: Information disclosure due to incorrect boundary conditions in the Audio/Video component (CVE-2026-7320) firefox: thunderbird: Memory safety bugs fixed in Thunderbird ESR 140.10.1 and Thunderbird 150.0.1 (CVE-2026-7322) firefox: thunderbird: webrtc: Sandbox escape due to incorrect boundary conditions in the WebRTC: Networking component (CVE-2026-7321) 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. Solution For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 Affected Products Red Hat Enterprise Linux for x86_64 - Extended Update Support Extension 8.4 x86_64 Red Hat Enterprise Linux Server - AUS 8.4 x86_64 Fixes BZ - 2463481 - CVE-2026-7323 firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 140.10.1 and Firefox 150.0.1 BZ - 2463483 - CVE-2026-7320 firefox: thunderbird: Information disclosure due to incorrect boundary conditions in the Audio/Video component BZ - 2463484 - CVE-2026-7322 firefox: thunderbird: Memory safety bugs fixed in Thunderbird ESR 140.10.1 and Thunderbird 150.0.1 BZ - 2463485 - CVE-2026-7321 firefox: thunderbird: webrtc: Sandbox escape due to incorrect boundary conditions in the WebRTC: Networking component CVEs CVE-2026-7320 CVE-2026-7321 CVE-2026-7322 CVE-2026-7323 References https://access.redhat.com/security/updates/classification/#important Note: More recent versions of these packages may be available. Click a package name for more details. Red Hat Enterprise Linux for x86_64 - Extended Update Support Extension 8.4 SRPM firefox-140.10.1-1.el8_4.src.rpm SHA-256: f89257db2523c6b521e44d0f0de6db2d5606a3956064471da3b07208b96e06e7 x86_64 firefox-140.10.1-1.el8_4.x86_64.rpm SHA-256: f5449206c2ceb87a00117be0fad7b231804559459b79b3249c33edb5972f194b firefox-debuginfo-140.10.1-1.el8_4.x86_64.rpm SHA-256: 4d4f24365aaae91c3cf4710619c10b8169248f8bd8d9bfcf41475e71f816ae84 firefox-debugsource-140.10.1-1.el8_4.x86_64.rpm SHA-256: 4406f575c287ee9515241cf9ddf75d6b7241bc95a2dd156ba17010fdc4dbffef Red Hat Enterprise Linux Server - AUS 8.4 SRPM firefox-140.10.1-1.el8_4.src.rpm SHA-256: f89257db2523c6b521e44d0f0de6db2d5606a3956064471da3b07208b96e06e7 x86_64 firefox-140.10.1-1.el8_4.x86_64.rpm SHA-256: f5449206c2ceb87a00117be0fad7b231804559459b79b3249c33edb5972f194b firefox-debuginfo-140.10.1-1.el8_4.x86_64.rpm SHA-256: 4d4f24365aaae91c3cf4710619c10b8169248f8bd8d9bfcf41475e71f816ae84 firefox-debugsource-140.10.1-1.el8_4.x86_64.rpm SHA-256: 4406f575c287ee9515241cf9ddf75d6b7241bc95a2dd156ba17010fdc4dbffef The Red Hat security contact is secalert@redhat.com . More contact details at https://access.redhat.com/security/team/contact/ .