Red Hat Security Advisory: firefox security update
Multiple security vulnerabilities affecting Mozilla Firefox and related components in Red Hat Enterprise Linux 10 have been addressed in an important security update. 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, memory safety bugs, and an integer overflow in the graphics text component. The update fixes these issues in Firefox ESR 140. 9. 1 and Firefox 149. 0. 2, among others. Red Hat has released patched packages for affected architectures and versions. The advisory rates the impact as Important and provides detailed fixes for each vulnerability.
AI Analysis
Technical Summary
This Red Hat security advisory addresses multiple vulnerabilities in Mozilla Firefox and associated libraries on Red Hat Enterprise Linux 10. The fixed issues include a use-after-free vulnerability in libpng (CVE-2026-33416) that could lead to arbitrary code execution, out-of-bounds read/write in libpng's Neon palette expansion causing information disclosure and denial of service (CVE-2026-33636), memory safety bugs in Firefox and Thunderbird (CVE-2026-5731 and CVE-2026-5734), and an integer overflow in the graphics text component (CVE-2026-5732). These vulnerabilities affect Firefox ESR 140.9.1, Firefox 149.0.2, Thunderbird ESR 140.9.1, and Thunderbird 149.0.2. Red Hat has released updated packages to remediate these issues across multiple architectures including x86_64, s390x, ppc64le, and aarch64. The advisory is classified as Important by Red Hat Product Security.
Potential Impact
The vulnerabilities fixed include arbitrary code execution, information disclosure, denial of service, memory safety bugs, and integer overflow issues. These could potentially allow attackers to execute code, cause application crashes, or leak sensitive information via the affected Firefox and Thunderbird versions on Red Hat Enterprise Linux 10. The advisory does not report any known exploits in the wild at this time.
Mitigation Recommendations
Red Hat has released updated Firefox packages for Red Hat Enterprise Linux 10 that address these vulnerabilities. Users should apply the provided security updates as detailed in the Red Hat advisory RHSA-2026:7672 and the referenced article https://access.redhat.com/articles/11258. Applying these official patches is the recommended and effective mitigation. No additional vendor-recommended mitigations or workarounds are indicated.
Red Hat Security Advisory: firefox security update
Description
Multiple security vulnerabilities affecting Mozilla Firefox and related components in Red Hat Enterprise Linux 10 have been addressed in an important security update. 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, memory safety bugs, and an integer overflow in the graphics text component. The update fixes these issues in Firefox ESR 140. 9. 1 and Firefox 149. 0. 2, among others. Red Hat has released patched packages for affected architectures and versions. The advisory rates the impact as Important and provides detailed fixes for each vulnerability.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This Red Hat security advisory addresses multiple vulnerabilities in Mozilla Firefox and associated libraries on Red Hat Enterprise Linux 10. The fixed issues include a use-after-free vulnerability in libpng (CVE-2026-33416) that could lead to arbitrary code execution, out-of-bounds read/write in libpng's Neon palette expansion causing information disclosure and denial of service (CVE-2026-33636), memory safety bugs in Firefox and Thunderbird (CVE-2026-5731 and CVE-2026-5734), and an integer overflow in the graphics text component (CVE-2026-5732). These vulnerabilities affect Firefox ESR 140.9.1, Firefox 149.0.2, Thunderbird ESR 140.9.1, and Thunderbird 149.0.2. Red Hat has released updated packages to remediate these issues across multiple architectures including x86_64, s390x, ppc64le, and aarch64. The advisory is classified as Important by Red Hat Product Security.
Potential Impact
The vulnerabilities fixed include arbitrary code execution, information disclosure, denial of service, memory safety bugs, and integer overflow issues. These could potentially allow attackers to execute code, cause application crashes, or leak sensitive information via the affected Firefox and Thunderbird versions on Red Hat Enterprise Linux 10. The advisory does not report any known exploits in the wild at this time.
Mitigation Recommendations
Red Hat has released updated Firefox packages for Red Hat Enterprise Linux 10 that address these vulnerabilities. Users should apply the provided security updates as detailed in the Red Hat advisory RHSA-2026:7672 and the referenced article https://access.redhat.com/articles/11258. Applying these official patches is the recommended and effective mitigation. No additional vendor-recommended mitigations or workarounds are indicated.
Technical Details
- Gcve Source
- db.gcve.eu
- Csaf Category
- csaf_security_advisory
- Csaf Version
- 2.0
- Publisher
- Red Hat Product Security
- Advisory Id
- RHSA-2026:7672
- Cve Count
- 5
- Additional Cves
- ["CVE-2026-5732","CVE-2026-5734","CVE-2026-33416","CVE-2026-33636"]
- Cvss Version
- null
Threat ID: 6a160984e29bf47b50650e82
Added to database: 5/26/2026, 8:58:44 PM
Last enriched: 5/26/2026, 10:32:51 PM
Last updated: 5/27/2026, 5:03:08 AM
Views: 2
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