Red Hat Security Advisory: firefox security update
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.
AI Analysis
Technical Summary
This advisory covers four security vulnerabilities in Mozilla Firefox distributed with Red Hat Enterprise Linux 10. CVE-2025-6424 is a use-after-free vulnerability in FontFaceSet. CVE-2025-6430 involves ignoring the Content-Disposition header when a file is included in embed or object tags. CVE-2025-6429 concerns incorrect URL parsing that could allow embedding of youtube.com. CVE-2025-6425 relates to the WebCompat WebExtension exposing a persistent UUID. Red Hat has issued updated Firefox packages to fix these vulnerabilities across multiple RHEL 10 variants and architectures.
Potential Impact
The vulnerabilities collectively could lead to memory corruption (use-after-free), privacy issues (exposure of persistent UUID), and potential content embedding flaws due to incorrect URL parsing and header handling. These issues may impact browser security and user privacy. The advisory rates the overall impact as Important (high severity). No known exploits in the wild have been reported at this time.
Mitigation Recommendations
Red Hat has released updated Firefox packages for Red Hat Enterprise Linux 10 and its Extended Update Support versions. Users should apply these official updates promptly to remediate the vulnerabilities. Detailed update instructions are available at https://access.redhat.com/articles/11258. Since official fixes are available, applying the vendor-provided patches is the recommended mitigation.
Red Hat Security Advisory: firefox security update
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.
Affected software
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AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This advisory covers four security vulnerabilities in Mozilla Firefox distributed with Red Hat Enterprise Linux 10. CVE-2025-6424 is a use-after-free vulnerability in FontFaceSet. CVE-2025-6430 involves ignoring the Content-Disposition header when a file is included in embed or object tags. CVE-2025-6429 concerns incorrect URL parsing that could allow embedding of youtube.com. CVE-2025-6425 relates to the WebCompat WebExtension exposing a persistent UUID. Red Hat has issued updated Firefox packages to fix these vulnerabilities across multiple RHEL 10 variants and architectures.
Potential Impact
The vulnerabilities collectively could lead to memory corruption (use-after-free), privacy issues (exposure of persistent UUID), and potential content embedding flaws due to incorrect URL parsing and header handling. These issues may impact browser security and user privacy. The advisory rates the overall impact as Important (high severity). No known exploits in the wild have been reported at this time.
Mitigation Recommendations
Red Hat has released updated Firefox packages for Red Hat Enterprise Linux 10 and its Extended Update Support versions. Users should apply these official updates promptly to remediate the vulnerabilities. Detailed update instructions are available at https://access.redhat.com/articles/11258. Since official fixes are available, applying the vendor-provided patches is the recommended mitigation.
Technical Details
- Gcve Source
- db.gcve.eu
- Csaf Category
- csaf_security_advisory
- Csaf Version
- 2.0
- Publisher
- Red Hat Product Security
- Advisory Id
- RHSA-2025:10073
- Cve Count
- 4
- Additional Cves
- ["CVE-2025-6425","CVE-2025-6429","CVE-2025-6430"]
Threat ID: 6a3cc2974853345fc16d1804
Added to database: 06/25/2026, 05:54:31 UTC
Last enriched: 06/25/2026, 06:46:32 UTC
Last updated: 09/10/2026, 19:36:51 UTC
Views: 28
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