Red Hat Security Advisory: firefox security update
Multiple security vulnerabilities affecting Mozilla Firefox and related components have been addressed in Red Hat Enterprise Linux 8.2. These include arbitrary code execution due to a use-after-free in libpng, information disclosure and denial of service via out-of-bounds read/write in libpng's Neon palette expansion, memory safety bugs, and an integer overflow in the Graphics: Text component. The fixes are included in Firefox ESR 140.9.1 and Firefox 149.0.2 packages provided by Red Hat. The update is rated as important by Red Hat Product Security.
AI Analysis
Technical Summary
This advisory covers several security fixes for Mozilla Firefox and related components distributed with Red Hat Enterprise Linux 8.2. The vulnerabilities include CVE-2026-33416, a use-after-free in libpng leading to arbitrary code execution; CVE-2026-33636, an out-of-bounds read/write in libpng causing information disclosure and denial of service; CVE-2026-5731 and CVE-2026-5734, memory safety bugs fixed in Firefox ESR 140.9.1 and Firefox 149.0.2; and CVE-2026-5732, an integer overflow in the Graphics: Text component. Red Hat has released updated Firefox packages (e.g., firefox-140.9.1-1.el8_2) that address these issues. The advisory references Red Hat Bugzilla entries and provides links for applying the update.
Potential Impact
Successful exploitation of these vulnerabilities could lead to arbitrary code execution, information disclosure, denial of service, and memory safety issues within Firefox and related components on affected Red Hat Enterprise Linux systems. The impact severity is considered high due to the potential for code execution and system compromise.
Mitigation Recommendations
Red Hat has released updated Firefox packages (e.g., firefox-140.9.1-1.el8_2) for Red Hat Enterprise Linux 8.2 that fix these vulnerabilities. Users should apply the security update as detailed in the Red Hat advisory RHSA-2026:11805 and the article https://access.redhat.com/articles/11258. No additional mitigation steps are indicated beyond applying the official update.
Red Hat Security Advisory: firefox security update
Description
Multiple security vulnerabilities affecting Mozilla Firefox and related components have been addressed in Red Hat Enterprise Linux 8.2. These include arbitrary code execution due to a use-after-free in libpng, information disclosure and denial of service via out-of-bounds read/write in libpng's Neon palette expansion, memory safety bugs, and an integer overflow in the Graphics: Text component. The fixes are included in Firefox ESR 140.9.1 and Firefox 149.0.2 packages provided by Red Hat. The update is rated as important by Red Hat Product Security.
Affected software
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AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This advisory covers several security fixes for Mozilla Firefox and related components distributed with Red Hat Enterprise Linux 8.2. The vulnerabilities include CVE-2026-33416, a use-after-free in libpng leading to arbitrary code execution; CVE-2026-33636, an out-of-bounds read/write in libpng causing information disclosure and denial of service; CVE-2026-5731 and CVE-2026-5734, memory safety bugs fixed in Firefox ESR 140.9.1 and Firefox 149.0.2; and CVE-2026-5732, an integer overflow in the Graphics: Text component. Red Hat has released updated Firefox packages (e.g., firefox-140.9.1-1.el8_2) that address these issues. The advisory references Red Hat Bugzilla entries and provides links for applying the update.
Potential Impact
Successful exploitation of these vulnerabilities could lead to arbitrary code execution, information disclosure, denial of service, and memory safety issues within Firefox and related components on affected Red Hat Enterprise Linux systems. The impact severity is considered high due to the potential for code execution and system compromise.
Mitigation Recommendations
Red Hat has released updated Firefox packages (e.g., firefox-140.9.1-1.el8_2) for Red Hat Enterprise Linux 8.2 that fix these vulnerabilities. Users should apply the security update as detailed in the Red Hat advisory RHSA-2026:11805 and the article https://access.redhat.com/articles/11258. No additional mitigation steps are indicated beyond applying the official update.
Technical Details
- Gcve Source
- db.gcve.eu
- Csaf Category
- csaf_security_advisory
- Csaf Version
- 2.0
- Publisher
- Red Hat Product Security
- Advisory Id
- RHSA-2026:11805
- Cve Count
- 5
- Additional Cves
- ["CVE-2026-5732","CVE-2026-5734","CVE-2026-33416","CVE-2026-33636"]
- Cvss Version
- null
Threat ID: 6a160980e29bf47b5064cfd0
Added to database: 05/26/2026, 20:58:40 UTC
Last enriched: 07/23/2026, 00:53:22 UTC
Last updated: 07/31/2026, 19:22:59 UTC
Views: 74
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