RHSA-2025:10184 - Security Advisory

Topic

An update for firefox is now available for Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support.

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: Content-Disposition header ignored when a file is included in an embed or object tag (CVE-2025-6430)
• firefox: Use-after-free in FontFaceSet (CVE-2025-6424)
• firefox: Incorrect parsing of URLs could have allowed embedding of youtube.com (CVE-2025-6429)
• firefox: The WebCompat WebExtension shipped with Firefox exposed a persistent UUID (CVE-2025-6425)

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 8.4 x86_64

Fixes

• BZ - 2374555 - CVE-2025-6430 firefox: Content-Disposition header ignored when a file is included in an embed or object tag
• BZ - 2374559 - CVE-2025-6424 firefox: Use-after-free in FontFaceSet
• BZ - 2374561 - CVE-2025-6429 firefox: Incorrect parsing of URLs could have allowed embedding of youtube.com
• BZ - 2374562 - CVE-2025-6425 firefox: The WebCompat WebExtension shipped with Firefox exposed a persistent UUID

CVEs

• CVE-2025-6424
• CVE-2025-6425
• CVE-2025-6429
• CVE-2025-6430

References

• https://access.redhat.com/security/updates/classification/#important