Red Hat Security Advisory: firefox security update
An update for firefox is now available for Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support, Red Hat Enterprise Linux 8.4 Update Services for SAP Solutions, and Red Hat Enterprise Linux 8.4 Telecommunications Update Service. 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.
describes (2)
Related CVEs.
| ID | severity | exploitable | ||
|---|---|---|---|---|
| CVE-2025-4919US | — | — | ||
An attacker was able to perform an out-of-bounds read or write on a JavaScript object by confusing array index sizes. This vulnerability was fixed in Firefox 138.0.4, Firefox ESR 1… | ||||
| CVE-2025-4918US | — | — | ||
An attacker was able to perform an out-of-bounds read or write on a JavaScript `Promise` object. This vulnerability was fixed in Firefox 138.0.4, Firefox ESR 128.10.1, Firefox ESR… | ||||
references
External citations — patches, advisories, analysis.
remediations (16)
- Fixedfirefox-0:128.10.1-1.el8_4.src as a component of Red Hat Enterprise Linux AppStream AUS (v.8.4)
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2025:8640 - Fixedfirefox-0:128.10.1-1.el8_4.src as a component of Red Hat Enterprise Linux AppStream AUS (v.8.4)
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2025:8640 - Fixedfirefox-0:128.10.1-1.el8_4.x86_64 as a component of Red Hat Enterprise Linux AppStream AUS (v.8.4)
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2025:8640 - Fixedfirefox-0:128.10.1-1.el8_4.x86_64 as a component of Red Hat Enterprise Linux AppStream AUS (v.8.4)
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2025:8640 - Fixedfirefox-debuginfo-0:128.10.1-1.el8_4.x86_64 as a component of Red Hat Enterprise Linux AppStream AUS (v.8.4)
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2025:8640 - Fixedfirefox-debuginfo-0:128.10.1-1.el8_4.x86_64 as a component of Red Hat Enterprise Linux AppStream AUS (v.8.4)
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2025:8640 - Fixedfirefox-debugsource-0:128.10.1-1.el8_4.x86_64 as a component of Red Hat Enterprise Linux AppStream AUS (v.8.4)
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2025:8640 - Fixedfirefox-debugsource-0:128.10.1-1.el8_4.x86_64 as a component of Red Hat Enterprise Linux AppStream AUS (v.8.4)
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2025:8640 - Workaroundfirefox-0:128.10.1-1.el8_4.src as a component of Red Hat Enterprise Linux AppStream AUS (v.8.4)
No mitigation is currently available that meets Red Hat Product Security’s standards for usability, deployment, applicability, or stability.
- Workaroundfirefox-0:128.10.1-1.el8_4.src as a component of Red Hat Enterprise Linux AppStream AUS (v.8.4)
No mitigation is currently available that meets Red Hat Product Security’s standards for usability, deployment, applicability, or stability.
- Workaroundfirefox-0:128.10.1-1.el8_4.x86_64 as a component of Red Hat Enterprise Linux AppStream AUS (v.8.4)
No mitigation is currently available that meets Red Hat Product Security’s standards for usability, deployment, applicability, or stability.
- Workaroundfirefox-0:128.10.1-1.el8_4.x86_64 as a component of Red Hat Enterprise Linux AppStream AUS (v.8.4)
No mitigation is currently available that meets Red Hat Product Security’s standards for usability, deployment, applicability, or stability.
- Workaroundfirefox-debuginfo-0:128.10.1-1.el8_4.x86_64 as a component of Red Hat Enterprise Linux AppStream AUS (v.8.4)
No mitigation is currently available that meets Red Hat Product Security’s standards for usability, deployment, applicability, or stability.
- Workaroundfirefox-debuginfo-0:128.10.1-1.el8_4.x86_64 as a component of Red Hat Enterprise Linux AppStream AUS (v.8.4)
No mitigation is currently available that meets Red Hat Product Security’s standards for usability, deployment, applicability, or stability.
- Workaroundfirefox-debugsource-0:128.10.1-1.el8_4.x86_64 as a component of Red Hat Enterprise Linux AppStream AUS (v.8.4)
No mitigation is currently available that meets Red Hat Product Security’s standards for usability, deployment, applicability, or stability.
- Workaroundfirefox-debugsource-0:128.10.1-1.el8_4.x86_64 as a component of Red Hat Enterprise Linux AppStream AUS (v.8.4)
No mitigation is currently available that meets Red Hat Product Security’s standards for usability, deployment, applicability, or stability.
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