Summary
Mozilla Firefox is an open-source web browser, designed for standards compliance, performance, and portability.
Security Fix(es):
* firefox: Out-of-bounds access when resolving Promise objects (CVE-2025-4918)
* firefox: Out-of-bounds access when optimizing linear sums (CVE-2025-4919)
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 2
| Release | Package | Fixed in |
|---|---|---|
| AlmaLinux · 9 | firefox | 128.10.1-1.el9_6.alma.1 |
| AlmaLinux · 9 | firefox-x11 | 128.10.1-1.el9_6.alma.1 |
Vulnerabilities 2
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Critical 9.8
Out-of-bounds access when resolving Promise objects
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 115.23.1, Thunderbird 128.10.2, and Thunderbird 138.0.2.
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High 8.8
Out-of-bounds access when optimizing linear sums
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 128.10.1, Firefox ESR 115.23.1, Thunderbird 128.10.2, and Thunderbird 138.0.2.