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OpenAdvisories
High ALSA-2025:14442 5 CVEs

Important: firefox security update

Published Aug 25, 2025 · Updated Oct 29, 2026

Ecosystem: AlmaLinux

Summary

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

Security Fix(es):

* firefox: thunderbird: Denial-of-service due to out-of-memory in the Graphics: WebRender component (CVE-2025-9182)
* thunderbird: firefox: Sandbox escape due to invalid pointer in the Audio/Video: GMP component (CVE-2025-9179)
* thunderbird: firefox: Same-origin policy bypass in the Graphics: Canvas2D component (CVE-2025-9180)
* thunderbird: firefox: Uninitialized memory in the JavaScript Engine component (CVE-2025-9181)
* thunderbird: firefox: Memory safety bugs fixed in Firefox ESR 115.27, Firefox ESR 128.14, Thunderbird ESR 128.14, Firefox ESR 140.2, Thunderbird ESR 140.2, Firefox 142 and Thunderbird 142 (CVE-2025-9185)

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.

Fixed packages 1

ReleasePackageFixed in
AlmaLinux · 8 firefox 128.14.0-2.el8_10.alma.1

Vulnerabilities 5

  • Critical 9.8
    CVE-2025-9179

    Sandbox escape due to invalid pointer in the Audio/Video: GMP component

    An attacker was able to perform memory corruption in the GMP process which processes encrypted media. This process is also heavily sandboxed, but represents slightly different privileges from the content process. This vulnerability was fixed in Firefox 142, F…

    Mozilla Firefox Thunderbird thunderbird Browsers Debian Ubuntu Wolfi
  • High 8.1
    CVE-2025-9180

    Same-origin policy bypass in the Graphics: Canvas2D component

    Same-origin policy bypass in the Graphics: Canvas2D component. This vulnerability was fixed in Firefox 142, Firefox ESR 115.27, Firefox ESR 128.14, Firefox ESR 140.2, Thunderbird 142, Thunderbird 128.14, and Thunderbird 140.2.

    Mozilla Firefox Thunderbird thunderbird Browsers Debian Ubuntu Wolfi
  • High 8.1
    CVE-2025-9185

    Memory safety bugs fixed in Firefox ESR 115.27, Firefox ESR 128.14, Thunderbird ESR 128.14, Firefox ESR 140.2, Thunderbird ESR 140.2, Firefox 142 and Thunderbird 142

    Memory safety bugs present in Firefox ESR 115.26, Firefox ESR 128.13, Thunderbird ESR 128.13, Firefox ESR 140.1, Thunderbird ESR 140.1, Firefox 141 and Thunderbird 141. Some of these bugs showed evidence of memory corruption and we presume that with enough ef…

    Mozilla Firefox Thunderbird thunderbird Browsers Debian Ubuntu Wolfi
  • High 7.5
    CVE-2025-9182

    Denial-of-service due to out-of-memory in the Graphics: WebRender component

    Denial-of-service due to out-of-memory in the Graphics: WebRender component. This vulnerability was fixed in Firefox 142, Firefox ESR 140.2, Thunderbird 142, and Thunderbird 140.2.

    Mozilla Firefox Thunderbird thunderbird Browsers Ubuntu Wolfi
  • Medium 6.5
    CVE-2025-9181

    Uninitialized memory in the JavaScript Engine component

    Uninitialized memory in the JavaScript Engine component. This vulnerability was fixed in Firefox 142, Firefox ESR 128.14, Firefox ESR 140.2, Thunderbird 142, Thunderbird 128.14, and Thunderbird 140.2.

    Mozilla Firefox Thunderbird thunderbird Browsers Debian Ubuntu Wolfi

References

  • report
    https://access.redhat.com/security/cve/CVE-2025-9179
  • report
    https://access.redhat.com/security/cve/CVE-2025-9180
  • report
    https://access.redhat.com/security/cve/CVE-2025-9181
  • report
    https://access.redhat.com/security/cve/CVE-2025-9182
  • report
    https://access.redhat.com/security/cve/CVE-2025-9185
  • report
    https://bugzilla.redhat.com/2389575
  • report
    https://bugzilla.redhat.com/2389580
  • report
    https://bugzilla.redhat.com/2389581
  • report
    https://bugzilla.redhat.com/2389583
  • report
    https://bugzilla.redhat.com/2389584
  • advisory
    https://errata.almalinux.org/8/ALSA-2025-14442.html