ALSA-2026:68549

Mozilla Firefox is an open-source web browser, designed for standards compliance, performance, and portability.

Security Fix(es):

• firefox: thunderbird: Privilege escalation in the DOM: Workers component (CVE-2026-16365)
• firefox: thunderbird: Sandbox escape in the Remote Settings Client component (CVE-2026-75874)
• firefox: Sandbox escape due to use-after-free in the DOM: Security component (CVE-2026-84121)
• firefox: Internally found bugs fixed in Firefox 155, Firefox ESR 153.2, Firefox ESR 140.15 and Firefox ESR 115.40 (CVE-2026-84145)
• firefox: Sandbox escape due to use-after-free in the DOM: Navigation component (CVE-2026-84119)
• firefox: Use-after-free in the Audio/Video component (CVE-2026-84120)
• firefox: Privilege escalation due to invalid pointer in the Graphics component (CVE-2026-84131)
• firefox: Use-after-free in the DOM: Core & HTML component (CVE-2026-84124)
• firefox: Use-after-free in the Audio/Video component (CVE-2026-84122)
• firefox: Internally found bugs fixed in Firefox 155, Firefox ESR 153.2 and Firefox ESR 140.15 (CVE-2026-84143)

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.