Red Hat Security Advisory: firefox security update
Multiple security vulnerabilities affecting Mozilla Firefox and Thunderbird have been addressed in a Red Hat Enterprise Linux 7 Extended Lifecycle Support update. These include memory safety bugs, incorrect URL handling in Content Security Policy (CSP) reports, partial return value writes in the JavaScript engine, potential user-assisted code execution, and bypasses of CSP via XSLT documents. The update fixes nine CVEs related to these issues. Red Hat rates the security impact as Important and has released patches for affected packages.
AI Analysis
Technical Summary
This advisory covers a set of nine security vulnerabilities in Mozilla Firefox and Thunderbird as packaged for Red Hat Enterprise Linux 7 Extended Lifecycle Support. The issues include a large branch table leading to truncated instructions (CVE-2025-8028), multiple memory safety bugs (CVE-2025-8034, CVE-2025-8035), incorrect URL stripping in CSP reports (CVE-2025-8031), partial return value writes in the JavaScript engine stack (CVE-2025-8027), potential user-assisted code execution via the 'Copy as cURL' command (CVE-2025-8030), incorrect JavaScript state machine behavior for generators (CVE-2025-8033), CSP bypass via XSLT documents (CVE-2025-8032), and execution of javascript: URLs on object and embed tags (CVE-2025-8029). Red Hat has issued updated Firefox packages to address these vulnerabilities.
Potential Impact
The vulnerabilities collectively pose risks including memory safety issues that could lead to crashes or code execution, incorrect enforcement of Content Security Policy potentially allowing malicious content, and user-assisted code execution vectors. These issues could impact the confidentiality, integrity, and availability of systems running affected Firefox or Thunderbird versions on Red Hat Enterprise Linux 7 Extended Lifecycle Support. The severity is rated as Important by Red Hat.
Mitigation Recommendations
Red Hat has released updated Firefox packages for Red Hat Enterprise Linux 7 Extended Lifecycle Support that address these vulnerabilities. Users should apply the security update as detailed in Red Hat advisory RHSA-2025:12278 and the referenced article https://access.redhat.com/articles/11258. No additional mitigation steps are indicated beyond applying the official patches.
Red Hat Security Advisory: firefox security update
Description
Multiple security vulnerabilities affecting Mozilla Firefox and Thunderbird have been addressed in a Red Hat Enterprise Linux 7 Extended Lifecycle Support update. These include memory safety bugs, incorrect URL handling in Content Security Policy (CSP) reports, partial return value writes in the JavaScript engine, potential user-assisted code execution, and bypasses of CSP via XSLT documents. The update fixes nine CVEs related to these issues. Red Hat rates the security impact as Important and has released patches for affected packages.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This advisory covers a set of nine security vulnerabilities in Mozilla Firefox and Thunderbird as packaged for Red Hat Enterprise Linux 7 Extended Lifecycle Support. The issues include a large branch table leading to truncated instructions (CVE-2025-8028), multiple memory safety bugs (CVE-2025-8034, CVE-2025-8035), incorrect URL stripping in CSP reports (CVE-2025-8031), partial return value writes in the JavaScript engine stack (CVE-2025-8027), potential user-assisted code execution via the 'Copy as cURL' command (CVE-2025-8030), incorrect JavaScript state machine behavior for generators (CVE-2025-8033), CSP bypass via XSLT documents (CVE-2025-8032), and execution of javascript: URLs on object and embed tags (CVE-2025-8029). Red Hat has issued updated Firefox packages to address these vulnerabilities.
Potential Impact
The vulnerabilities collectively pose risks including memory safety issues that could lead to crashes or code execution, incorrect enforcement of Content Security Policy potentially allowing malicious content, and user-assisted code execution vectors. These issues could impact the confidentiality, integrity, and availability of systems running affected Firefox or Thunderbird versions on Red Hat Enterprise Linux 7 Extended Lifecycle Support. The severity is rated as Important by Red Hat.
Mitigation Recommendations
Red Hat has released updated Firefox packages for Red Hat Enterprise Linux 7 Extended Lifecycle Support that address these vulnerabilities. Users should apply the security update as detailed in Red Hat advisory RHSA-2025:12278 and the referenced article https://access.redhat.com/articles/11258. No additional mitigation steps are indicated beyond applying the official patches.
Technical Details
- Gcve Source
- db.gcve.eu
- Csaf Category
- csaf_security_advisory
- Csaf Version
- 2.0
- Publisher
- Red Hat Product Security
- Advisory Id
- RHSA-2025:12278
- Cve Count
- 9
- Additional Cves
- ["CVE-2025-8028","CVE-2025-8029","CVE-2025-8030","CVE-2025-8031","CVE-2025-8032","CVE-2025-8033","CVE-2025-8034","CVE-2025-8035"]
- Cvss Version
- null
Threat ID: 6a3cc29f4853345fc16d4449
Added to database: 06/25/2026, 05:54:39 UTC
Last enriched: 06/25/2026, 06:01:44 UTC
Last updated: 06/25/2026, 10:00:48 UTC
Views: 3
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