{"schema_version": "1.7.0", "id": "RLSA-2026:21380", "modified": "2026-06-04T12:05:41.826512Z", "published": "2026-06-04T12:04:37.164871Z", "upstream": ["CVE-2026-8388", "CVE-2026-8391", "CVE-2026-8401", "CVE-2026-8946", "CVE-2026-8947", "CVE-2026-8950", "CVE-2026-8953", "CVE-2026-8954", "CVE-2026-8955", "CVE-2026-8956", "CVE-2026-8957", "CVE-2026-8958", "CVE-2026-8961", "CVE-2026-8962", "CVE-2026-8968", "CVE-2026-8970", "CVE-2026-8974", "CVE-2026-8975"], "summary": "Important: firefox security update", "details": "Mozilla Firefox is an open-source web browser, designed for standards compliance, performance, and portability.\n\nSecurity Fix(es):\n\n* firefox: Incorrect boundary conditions in the JavaScript Engine: JIT component (CVE-2026-8388)\n\n* firefox: Other issue in the JavaScript Engine component (CVE-2026-8391)\n\n* firefox: Sandbox escape in the Profile Backup component (CVE-2026-8401)\n\n* firefox: Integer overflow in the Networking: JAR component (CVE-2026-8956)\n\n* firefox: Memory safety bugs fixed in Firefox ESR 115.36, Firefox ESR 140.11 and Firefox 151 (CVE-2026-8975)\n\n* firefox: Privilege escalation in the DOM: Workers component (CVE-2026-8955)\n\n* firefox: Denial-of-service due to invalid pointer in the Audio/Video: Web Codecs component (CVE-2026-8968)\n\n* firefox: Incorrect boundary conditions, integer overflow in the Audio/Video component (CVE-2026-8954)\n\n* firefox: Information disclosure, sandbox escape in the Security: Process Sandboxing component (CVE-2026-8958)\n\n* firefox: Incorrect boundary conditions in the Audio/Video: Web Codecs component (CVE-2026-8946)\n\n* firefox: Privilege escalation in the Security component (CVE-2026-8970)\n\n* firefox: Same-origin policy bypass in the Networking: HTTP component (CVE-2026-8950)\n\n* firefox: Memory safety bugs fixed in Firefox ESR 140.11 and Firefox 151 (CVE-2026-8974)\n\n* firefox: Sandbox escape due to use-after-free in the Disability Access APIs component (CVE-2026-8953)\n\n* firefox: Spoofing issue in the Form Autofill component (CVE-2026-8961)\n\n* firefox: Use-after-free in the DOM: Bindings (WebIDL) component (CVE-2026-8947)\n\n* firefox: Mitigation bypass in the DOM: Security component (CVE-2026-8962)\n\n* firefox: Privilege escalation in the Enterprise Policies component (CVE-2026-8957)\n\nFor 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.", "severity": [{"type": "CVSS_V3", "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H"}], "affected": [{"package": {"ecosystem": "Rocky Linux:10", "name": "firefox", "purl": "pkg:rpm/rocky-linux/firefox?distro=rocky-linux-10&epoch=0"}, "ranges": [{"type": "ECOSYSTEM", "events": [{"introduced": "0"}, {"fixed": "0:140.11.0-1.el10_2"}], "database_specific": {"yum_repository": "AppStream"}}]}], "references": [{"type": "ADVISORY", "url": "https://errata.rockylinux.org/RLSA-2026:21380"}, {"type": "REPORT", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2479873"}, {"type": "REPORT", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2479876"}, {"type": "REPORT", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2479842"}, {"type": "REPORT", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2476469"}, {"type": "REPORT", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2479846"}, {"type": "REPORT", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2479871"}, {"type": "REPORT", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2479853"}, {"type": "REPORT", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2479839"}, {"type": "REPORT", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2476475"}, {"type": "REPORT", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2479855"}, {"type": "REPORT", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2479860"}, {"type": "REPORT", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2479852"}, {"type": "REPORT", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2479880"}, {"type": "REPORT", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2479849"}, {"type": "REPORT", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2479847"}, {"type": "REPORT", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2479848"}, {"type": "REPORT", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2479840"}, {"type": "REPORT", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2476492"}], "credits": [{"name": "Rocky Enterprise Software Foundation"}, {"name": "Red Hat"}]}