Red Hat Security Advisory: firefox security update
Red Hat has issued a security advisory for Mozilla Firefox addressing two vulnerabilities involving out-of-bounds access: one when resolving Promise objects (CVE-2025-4918) and another when optimizing linear sums (CVE-2025-4919). These issues affect Red Hat Enterprise Linux 7 Extended Lifecycle Support versions. The vulnerabilities are rated as important by Red Hat Product Security. Updates are available to remediate these issues.
AI Analysis
Technical Summary
This advisory covers two security vulnerabilities in Mozilla Firefox and Thunderbird as packaged by Red Hat for Red Hat Enterprise Linux 7 Extended Lifecycle Support. Both vulnerabilities involve out-of-bounds memory access: CVE-2025-4918 occurs during Promise object resolution, and CVE-2025-4919 occurs during optimization of linear sums. These issues could potentially lead to memory corruption. Red Hat has released updated Firefox packages (version 128.10.1-1.el7_9) to address these vulnerabilities.
Potential Impact
The vulnerabilities involve out-of-bounds memory access, which can lead to memory corruption and potentially allow an attacker to cause a denial of service or execute arbitrary code. Red Hat rates the security 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 7 Extended Lifecycle Support to address these vulnerabilities. Users should apply the provided security update (firefox-128.10.1-1.el7_9) as detailed in the Red Hat advisory RHSA-2025:8465 and the referenced update article (https://access.redhat.com/articles/11258). No additional mitigation steps are indicated by the vendor.
Red Hat Security Advisory: firefox security update
Description
Red Hat has issued a security advisory for Mozilla Firefox addressing two vulnerabilities involving out-of-bounds access: one when resolving Promise objects (CVE-2025-4918) and another when optimizing linear sums (CVE-2025-4919). These issues affect Red Hat Enterprise Linux 7 Extended Lifecycle Support versions. The vulnerabilities are rated as important by Red Hat Product Security. Updates are available to remediate these issues.
Affected software
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This advisory covers two security vulnerabilities in Mozilla Firefox and Thunderbird as packaged by Red Hat for Red Hat Enterprise Linux 7 Extended Lifecycle Support. Both vulnerabilities involve out-of-bounds memory access: CVE-2025-4918 occurs during Promise object resolution, and CVE-2025-4919 occurs during optimization of linear sums. These issues could potentially lead to memory corruption. Red Hat has released updated Firefox packages (version 128.10.1-1.el7_9) to address these vulnerabilities.
Potential Impact
The vulnerabilities involve out-of-bounds memory access, which can lead to memory corruption and potentially allow an attacker to cause a denial of service or execute arbitrary code. Red Hat rates the security 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 7 Extended Lifecycle Support to address these vulnerabilities. Users should apply the provided security update (firefox-128.10.1-1.el7_9) as detailed in the Red Hat advisory RHSA-2025:8465 and the referenced update article (https://access.redhat.com/articles/11258). No additional mitigation steps are indicated by the vendor.
Technical Details
- Gcve Source
- db.gcve.eu
- Csaf Category
- csaf_security_advisory
- Csaf Version
- 2.0
- Publisher
- Red Hat Product Security
- Advisory Id
- RHSA-2025:8465
- Cve Count
- 2
- Additional Cves
- ["CVE-2025-4919"]
Threat ID: 6a4049e427e9c79719833c40
Added to database: 06/27/2026, 22:08:36 UTC
Last enriched: 06/27/2026, 22:32:40 UTC
Last updated: 09/10/2026, 19:36:50 UTC
Views: 18
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