Red Hat Product Errata RHSA-2026:25014 - Security Advisory Issued: 2026-06-10 Updated: 2026-06-10 RHSA-2026:25014 - Security Advisory Overview Updated Packages Synopsis Important: thunderbird 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 thunderbird is now available for Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support and Red Hat Enterprise Linux 8.6 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 Thunderbird is a standalone mail and newsgroup client. 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 8.6 x86_64 Red Hat Enterprise Linux Server - AUS 8.6 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 8.6 SRPM thunderbird-140.10.1-1.el8_6.src.rpm SHA-256: 2c027486265041f4cc0cc6900c701dba16827c49781d4b67f70e2378ee16ffb1 x86_64 thunderbird-140.10.1-1.el8_6.x86_64.rpm SHA-256: 0539ae78ec54c8235c8f0a4c50af5ec787e6bd7eda7ac1af40ff1aeefebf14b8 thunderbird-debuginfo-140.10.1-1.el8_6.x86_64.rpm SHA-256: 5dd5e993ed705970b715ddc41940188af6e2c808916072678f04cb92832db755 thunderbird-debugsource-140.10.1-1.el8_6.x86_64.rpm SHA-256: 812e9add2aa246ec6c40d0f4da18b7b4b743e60d21641df55b797a9ddc42b7d6 Red Hat Enterprise Linux Server - AUS 8.6 SRPM thunderbird-140.10.1-1.el8_6.src.rpm SHA-256: 2c027486265041f4cc0cc6900c701dba16827c49781d4b67f70e2378ee16ffb1 x86_64 thunderbird-140.10.1-1.el8_6.x86_64.rpm SHA-256: 0539ae78ec54c8235c8f0a4c50af5ec787e6bd7eda7ac1af40ff1aeefebf14b8 thunderbird-debuginfo-140.10.1-1.el8_6.x86_64.rpm SHA-256: 5dd5e993ed705970b715ddc41940188af6e2c808916072678f04cb92832db755 thunderbird-debugsource-140.10.1-1.el8_6.x86_64.rpm SHA-256: 812e9add2aa246ec6c40d0f4da18b7b4b743e60d21641df55b797a9ddc42b7d6 The Red Hat security contact is secalert@redhat.com . More contact details at https://access.redhat.com/security/team/contact/ .