This Important Thunderbird update addresses four high-severity vulnerabilities (CVE-2026-7320, CVE-2026-7321, CVE-2026-7322, CVE-2026-7323) with CVSS scores up to 7.5, including memory safety bugs, an information disclosure in the Audio/Video component, and a sandbox escape in WebRTC. Affected versions are Thunderbird prior to 140.10.1 and 150.0.1, with some vulnerabilities also affecting versions prior to 115.35.1. The fix requires updating to Thunderbird versions 140.10.1 or 150.0.1, as specified in the Red Hat advisory for RHEL 9.2 SAP Solutions.
Red Hat Product Errata RHSA-2026:24844 - Security Advisory Issued: 2026-06-09 Updated: 2026-06-09 RHSA-2026:24844 - 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 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 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 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 - 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 Server - AUS 9.2 SRPM thunderbird-140.10.1-1.el9_2.src.rpm SHA-256: 23b21e6dea9d207bd11686c56df731224b1ffd00b3d4cc00f0d3075a1a100ec8 x86_64 thunderbird-140.10.1-1.el9_2.x86_64.rpm SHA-256: 6b4f204698df6ab25764101456cdd8006850ef6e87e00ccb5eef15bfdebbac96 thunderbird-debuginfo-140.10.1-1.el9_2.x86_64.rpm SHA-256: 2a5060d21d05e83efaf093d720dd4ff270e62c33ce99dcc655521f3db4a233f8 thunderbird-debugsource-140.10.1-1.el9_2.x86_64.rpm SHA-256: e940ed34f9848242ad85aec02913663ea3da45b3284ec968b5897b67fc20b020 Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions 9.2 SRPM thunderbird-140.10.1-1.el9_2.src.rpm SHA-256: 23b21e6dea9d207bd11686c56df731224b1ffd00b3d4cc00f0d3075a1a100ec8 ppc64le thunderbird-140.10.1-1.el9_2.ppc64le.rpm SHA-256: 8682969fc7a73de9dbd34ca983dd79d4349d1e7352696f9ccb3d21cba3dc957f thunderbird-debuginfo-140.10.1-1.el9_2.ppc64le.rpm SHA-256: 928360ad68dca58f8e1803e14329b084f4bd1df6bb57c35e4644a83cfd703792 thunderbird-debugsource-140.10.1-1.el9_2.ppc64le.rpm SHA-256: 4edd812124c0412eed563db530a7e2ac36208caf10ef56cc5e45dc161a8e013f Red Hat Enterprise Linux for x86_64 - Update Services for SAP Solutions 9.2 SRPM thunderbird-140.10.1-1.el9_2.src.rpm SHA-256: 23b21e6dea9d207bd11686c56df731224b1ffd00b3d4cc00f0d3075a1a100ec8 x86_64 thunderbird-140.10.1-1.el9_2.x86_64.rpm SHA-256: 6b4f204698df6ab25764101456cdd8006850ef6e87e00ccb5eef15bfdebbac96 thunderbird-debuginfo-140.10.1-1.el9_2.x86_64.rpm SHA-256: 2a5060d21d05e83efaf093d720dd4ff270e62c33ce99dcc655521f3db4a233f8 thunderbird-debugsource-140.10.1-1.el9_2.x86_64.rpm SHA-256: e940ed34f9848242ad85aec02913663ea3da45b3284ec968b5897b67fc20b020 Red Hat Enterprise Linux for ARM 64 - 4 years of updates 9.2 SRPM thunderbird-140.10.1-1.el9_2.src.rpm SHA-256: 23b21e6dea9d207bd11686c56df731224b1ffd00b3d4cc00f0d3075a1a100ec8 aarch64 thunderbird-140.10.1-1.el9_2.aarch64.rpm SHA-256: ba33d1463f92ae0f47521b590532d6509712e3b9aba61c0fc4e44b31a006a468 thunderbird-debuginfo-140.10.1-1.el9_2.aarch64.rpm SHA-256: 9d4a439bb545ef122f45a56d31567e6735cd3f51f37699ce7c0b6d4f0ab3a2e4 thunderbird-debugsource-140.10.1-1.el9_2.aarch64.rpm SHA-256: 136851b064e74d3231ab2f6e6e6dcaf4125f27c1a6a20721938a1b7b85cf9515 Red Hat Enterprise Linux for IBM z Systems - 4 years of updates 9.2 SRPM thunderbird-140.10.1-1.el9_2.src.rpm SHA-256: 23b21e6dea9d207bd11686c56df731224b1ffd00b3d4cc00f0d3075a1a100ec8 s390x thunderbird-140.10.1-1.el9_2.s390x.rpm SHA-256: 9a34c7ebdec47d541a061dacca87820f22b97efb2231b4e3e1c2442d14803f55 thunderbird-debuginfo-140.10.1-1.el9_2.s390x.rpm SHA-256: 434504e56204134c3c775a6db9e7f00fa65114903a57f108aaae54de43887a5f thunderbird-debugsource-140.10.1-1.el9_2.s390x.rpm SHA-256: 78208fd5a9df3a61da4e4c901ecc76cc2c7ac4472dd4354e6b3297400363e6ed Red Hat Enterprise Linux for x86_64 - Extended Life Cycle 9.2 SRPM thunderbird-140.10.1-1.el9_2.src.rpm SHA-256: 23b21e6dea9d207bd11686c56df731224b1ffd00b3d4cc00f0d3075a1a100ec8 x86_64 thunderbird-140.10.1-1.el9_2.x86_64.rpm SHA-256: 6b4f204698df6ab25764101456cdd8006850ef6e87e00ccb5eef15bfdebbac96 thunderbird-debuginfo-140.10.1-1.el9_2.x86_64.rpm SHA-256: 2a5060d21d05e83efaf093d720dd4ff270e62c33ce99dcc655521f3db4a233f8 thunderbird-debugsource-140.10.1-1.el9_2.x86_64.rpm SHA-256: e940ed34f9848242ad85aec02913663ea3da45b3284ec968b5897b67fc20b020 Red Hat Enterprise Linux for ARM 64 - Extended Life Cycle 9.2 SRPM thunderbird-140.10.1-1.el9_2.src.rpm SHA-256: 23b21e6dea9d207bd11686c56df731224b1ffd00b3d4cc00f0d3075a1a100ec8 aarch64 thunderbird-140.10.1-1.el9_2.aarch64.rpm SHA-256: ba33d1463f92ae0f47521b590532d6509712e3b9aba61c0fc4e44b31a006a468 thunderbird-debuginfo-140.10.1-1.el9_2.aarch64.rpm SHA-256: 9d4a439bb545ef122f45a56d31567e6735cd3f51f37699ce7c0b6d4f0ab3a2e4 thunderbird-debugsource-140.10.1-1.el9_2.aarch64.rpm SHA-256: 136851b064e74d3231ab2f6e6e6dcaf4125f27c1a6a20721938a1b7b85cf9515 Red Hat Enterprise Linux for Power, little endian - Extended Life Cycle 9.2 SRPM thunderbird-140.10.1-1.el9_2.src.rpm SHA-256: 23b21e6dea9d207bd11686c56df731224b1ffd00b3d4cc00f0d3075a1a100ec8 ppc64le thunderbird-140.10.1-1.el9_2.ppc64le.rpm SHA-256: 8682969fc7a73de9dbd34ca983dd79d4349d1e7352696f9ccb3d21cba3dc957f thunderbird-debuginfo-140.10.1-1.el9_2.ppc64le.rpm SHA-256: 928360ad68dca58f8e1803e14329b084f4bd1df6bb57c35e4644a83cfd703792 thunderbird-debugsource-140.10.1-1.el9_2.ppc64le.rpm SHA-256: 4edd812124c0412eed563db530a7e2ac36208caf10ef56cc5e45dc161a8e013f Red Hat Enterprise Linux for IBM z Systems - Extended Life Cycle 9.2 SRPM thunderbird-140.10.1-1.el9_2.src.rpm SHA-256: 23b21e6dea9d207bd11686c56df731224b1ffd00b3d4cc00f0d3075a1a100ec8 s390x thunderbird-140.10.1-1.el9_2.s390x.rpm SHA-256: 9a34c7ebdec47d541a061dacca87820f22b97efb2231b4e3e1c2442d14803f55 thunderbird-debuginfo-140.10.1-1.el9_2.s390x.rpm SHA-256: 434504e56204134c3c775a6db9e7f00fa65114903a57f108aaae54de43887a5f thunderbird-debugsource-140.10.1-1.el9_2.s390x.rpm SHA-256: 78208fd5a9df3a61da4e4c901ecc76cc2c7ac4472dd4354e6b3297400363e6ed The Red Hat security contact is secalert@redhat.com . More contact details at https://access.redhat.com/security/team/contact/ .