Red Hat Product Errata RHSA-2026:17689 - Security Advisory Issued: 2026-05-14 Updated: 2026-05-14 RHSA-2026:17689 - 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 9.2 Update Services for SAP Solutions. 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: Incorrect boundary conditions in the Libraries component in NSS (CVE-2026-6772) firefox: thunderbird: Use-after-free in the JavaScript Engine component (CVE-2026-6754) firefox: thunderbird: Spoofing issue in the DOM: Core & HTML component (CVE-2026-6762) firefox: thunderbird: Incorrect boundary conditions in the WebRTC component (CVE-2026-6752) firefox: thunderbird: Other issue in the Storage: IndexedDB component (CVE-2026-6770) firefox: thunderbird: Invalid pointer in the JavaScript: WebAssembly component (CVE-2026-6757) firefox: thunderbird: Other issue in the Libraries component in NSS (CVE-2026-6767) firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 140.10, Thunderbird ESR 140.10, Firefox 150 and Thunderbird 150 (CVE-2026-6786) firefox: thunderbird: Incorrect boundary conditions in the WebRTC component (CVE-2026-6753) firefox: thunderbird: Use-after-free in the Widget: Cocoa component (CVE-2026-6759) firefox: thunderbird: Use-after-free in the WebRTC component (CVE-2026-6747) firefox: thunderbird: Information disclosure due to uninitialized memory in the Graphics: Canvas2D component (CVE-2026-6749) firefox: thunderbird: Incorrect boundary conditions in the Libraries component in NSS (CVE-2026-6766) firefox: thunderbird: Privilege escalation in the Networking component (CVE-2026-6761) firefox: thunderbird: Mitigation bypass in the File Handling component (CVE-2026-6763) firefox: thunderbird: Privilege escalation in the Graphics: WebRender component (CVE-2026-6750) firefox: thunderbird: Uninitialized memory in the Audio/Video: Web Codecs component (CVE-2026-6748) firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 115.35, Firefox ESR 140.10, Thunderbird ESR 140.10, Firefox 150 and Thunderbird 150 (CVE-2026-6785) firefox: thunderbird: Mitigation bypass in the DOM: Security component (CVE-2026-6771) firefox: thunderbird: Incorrect boundary conditions in the DOM: Device Interfaces component (CVE-2026-6764) firefox: thunderbird: Information disclosure in the Form Autofill component (CVE-2026-6765) firefox: thunderbird: Privilege escalation in the Debugger component (CVE-2026-6769) firefox: thunderbird: Uninitialized memory in the Audio/Video: Web Codecs component (CVE-2026-6751) firefox: thunderbird: Incorrect boundary conditions in the WebRTC: Networking component (CVE-2026-6776) firefox: thunderbird: Use-after-free in the DOM: Core & HTML component (CVE-2026-6746) 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 Server - AUS 9.2 x86_64 Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions 9.2 ppc64le Red Hat Enterprise Linux for x86_64 - Update Services for SAP Solutions 9.2 x86_64 Red Hat Enterprise Linux for ARM 64 - 4 years of updates 9.2 aarch64 Red Hat Enterprise Linux for IBM z Systems - 4 years of updates 9.2 s390x Red Hat Enterprise Linux for x86_64 - Extended Life Cycle 9.2 x86_64 Red Hat Enterprise Linux for ARM 64 - Extended Life Cycle 9.2 aarch64 Red Hat Enterprise Linux for Power, little endian - Extended Life Cycle 9.2 ppc64le Red Hat Enterprise Linux for IBM z Systems - Extended Life Cycle 9.2 s390x Fixes BZ - 2460074 - CVE-2026-6772 firefox: thunderbird: Incorrect boundary conditions in the Libraries component in NSS BZ - 2460075 - CVE-2026-6754 firefox: thunderbird: Use-after-free in the JavaScript Engine component BZ - 2460076 - CVE-2026-6762 firefox: thunderbird: Spoofing issue in the DOM: Core & HTML component BZ - 2460078 - CVE-2026-6752 firefox: thunderbird: Incorrect boundary conditions in the WebRTC component BZ - 2460079 - CVE-2026-6770 firefox: thunderbird: Other issue in the Storage: IndexedDB component BZ - 2460085 - CVE-2026-6757 firefox: thunderbird: Invalid pointer in the JavaScript: WebAssembly component BZ - 2460086 - CVE-2026-6767 firefox: thunderbird: Other issue in the Libraries component in NSS BZ - 2460088 - CVE-2026-6786 firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 140.10, Thunderbird ESR 140.10, Firefox 150 and Thunderbird 150 BZ - 2460092 - CVE-2026-6753 firefox: thunderbird: Incorrect boundary conditions in the WebRTC component BZ - 2460094 - CVE-2026-6759 firefox: thunderbird: Use-after-free in the Widget: Cocoa component BZ - 2460095 - CVE-2026-6747 firefox: thunderbird: Use-after-free in the WebRTC component BZ - 2460096 - CVE-2026-6749 firefox: thunderbird: Information disclosure due to uninitialized memory in the Graphics: Canvas2D component BZ - 2460097 - CVE-2026-6766 firefox: thunderbird: Incorrect boundary conditions in the Libraries component in NSS BZ - 2460099 - CVE-2026-6761 firefox: thunderbird: Privilege escalation in the Networking component BZ - 2460101 - CVE-2026-6763 firefox: thunderbird: Mitigation bypass in the File Handling component BZ - 2460102 - CVE-2026-6750 firefox: thunderbird: Privilege escalation in the Graphics: WebRender component BZ - 2460103 - CVE-2026-6748 firefox: thunderbird: Uninitialized memory in the Audio/Video: Web Codecs component BZ - 2460104 - CVE-2026-6785 firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 115.35, Firefox ESR 140.10, Thunderbird ESR 140.10, Firefox 150 and Thunderbird 150 BZ - 2460105 - CVE-2026-6771 firefox: thunderbird: Mitigation bypass in the DOM: Security component BZ - 2460106 - CVE-2026-6764 firefox: thunderbird: Incorrect boundary conditions in the DOM: Device Interfaces component BZ - 2460107 - CVE-2026-6765 firefox: thunderbird: Information disclosure in the Form Autofill component BZ - 2460108 - CVE-2026-6769 firefox: thunderbird: Privilege escalation in the Debugger component BZ - 2460109 - CVE-2026-6751 firefox: thunderbird: Uninitialized memory in the Audio/Video: Web Codecs component BZ - 2460110 - CVE-2026-6776 firefox: thunderbird: Incorrect boundary conditions in the WebRTC: Networking component BZ - 2460112 - CVE-2026-6746 firefox: thunderbird: Use-after-free in the DOM: Core & HTML component CVEs CVE-2026-6746 CVE-2026-6747 CVE-2026-6748 CVE-2026-6749 CVE-2026-6750 CVE-2026-6751 CVE-2026-6752 CVE-2026-6753 CVE-2026-6754 CVE-2026-6757 CVE-2026-6759 CVE-2026-6761 CVE-2026-6762 CVE-2026-6763 CVE-2026-6764 CVE-2026-6765 CVE-2026-6766 CVE-2026-6767 CVE-2026-6769 CVE-2026-6770 CVE-2026-6771 CVE-2026-6772 CVE-2026-6776 CVE-2026-6785 CVE-2026-6786 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 Server - AUS 9.2 SRPM firefox-140.10.0-1.el9_2.src.rpm SHA-256: a2b4f2c3c1d3d910ebc7f0db0b0217be9702ce15dd2a2b533aef7e0f65be8621 x86_64 firefox-140.10.0-1.el9_2.x86_64.rpm SHA-256: 91c569a4103125d6fbcc2ef21aa2de6ae2cd50a25495f378ce290b47e4d0aa0d firefox-debuginfo-140.10.0-1.el9_2.x86_64.rpm SHA-256: d50a0ef3338363aeea6c09d52867ab3111fe4e155a0a61b218a86281d21040d1 firefox-debugsource-140.10.0-1.el9_2.x86_64.rpm SHA-256: 8ae6bd55190cb8712b5ab1628cd667d662f5810ded486df9a82c1ed9ae4c2be4 firefox-x11-140.10.0-1.el9_2.x86_64.rpm SHA-256: 86c64f5d5486bed9c5925c48335461376bb59faca5de2691c8ea0424660a7835 Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions 9.2 SRPM firefox-140.10.0-1.el9_2.src.rpm SHA-256: a2b4f2c3c1d3d910ebc7f0db0b0217be9702ce15dd2a2b533aef7e0f65be8621 ppc64le firefox-140.10.0-1.el9_2.ppc64le.rpm SHA-256: 845d1215a561563046d4cf18fbf2b48027cfdc98c126d51034f525d931dd618a firefox-debuginfo-140.10.0-1.el9_2.ppc64le.rpm SHA-256: fd5409470549f66d0b4a8cfb3c580d62b9e56f990740ddf444101e5d1287c250 firefox-debugsource-140.10.0-1.el9_2.ppc64le.rpm SHA-256: 9f7437410aa90cac77e80dcfcc80f325805f8ffdb2866797a86b91303de47746 firefox-x11-140.10.0-1.el9_2.ppc64le.rpm SHA-256: 9e9e5155bca5dd770e79fb455cded9c099657976c670666ca15ec3ab3e985003 Red Hat Enterprise Linux for x86_64 - Update Services for SAP Solutions 9.2 SRPM firefox-140.10.0-1.el9_2.src.rpm SHA-256: a2b4f2c3c1d3d910ebc7f0db0b0217be9702ce15dd2a2b533aef7e0f65be8621 x86_64 firefox-140.10.0-1.el9_2.x86_64.rpm SHA-256: 91c569a4103125d6fbcc2ef21aa2de6ae2cd50a25495f378ce290b47e4d0aa0d firefox-debuginfo-140.10.0-1.el9_2.x86_64.rpm SHA-256: d50a0ef3338363aeea6c09d52867ab3111fe4e155a0a61b218a86281d21040d1 firefox-debugsource-140.10.0-1.el9_2.x86_64.rpm SHA-256: 8ae6bd55190cb8712b5ab1628cd667d662f5810ded486df9a82c1ed9ae4c2be4 firefox-x11-140.10.0-1.el9_2.x86_64.rpm SHA-256: 86c64f5d5486bed9c5925c48335461376bb59faca5de2691c8ea0424660a7835 Red Hat Enterprise Linux for ARM 64 - 4 years of updates 9.2 SRPM firefox-140.10.0-1.el9_2.src.rpm SHA-256: a2b4f2c3c1d3d910ebc7f0db0b0217be9702ce15dd2a2b533aef7e0f65be8621 aarch64 firefox-140.10.0-1.el9_2.aarch64.rpm SHA-256: 08d732d42b9ad7a4a47f182fc6ac488bacbbe1e190163b5257e24ba62730d397 firefox-debuginfo-140.10.0-1.el9_2.aarch64.rpm SHA-256: 967c