Mozilla Foundation Security Advisory 2025-66
Security Vulnerabilities fixed in Firefox ESR 128.14
- Announced
- August 19, 2025
- Impact
- high
- Products
- Firefox ESR
- Fixed in
-
- Firefox ESR 128.14
#CVE-2025-9179: Sandbox escape due to invalid pointer in the Audio/Video: GMP component
- Reporter
- Oskar
- Impact
- high
Description
An attacker was able to perform memory corruption in the GMP process which processes encrypted media. This process is also heavily sandboxed, but represents slightly different privileges from the content process.
References
#CVE-2025-9180: Same-origin policy bypass in the Graphics: Canvas2D component
- Reporter
- Tom Van Goethem
- Impact
- high
Description
'Same-origin policy bypass in the Graphics: Canvas2D component.'
References
#CVE-2025-9181: Uninitialized memory in the JavaScript Engine component
- Reporter
- Irvan Kurniawan
- Impact
- moderate
Description
Uninitialized memory in the JavaScript Engine component.
References
#CVE-2025-9185: Memory safety bugs fixed in Firefox ESR 115.27, Firefox ESR 128.14, Thunderbird ESR 128.14, Firefox ESR 140.2, Thunderbird ESR 140.2, Firefox 142 and Thunderbird 142
- Reporter
- The Mozilla Fuzzing Team
- Impact
- high
Description
Memory safety bugs present in Firefox ESR 115.26, Firefox ESR 128.13, Thunderbird ESR 128.13, Firefox ESR 140.1, Thunderbird ESR 140.1, Firefox 141 and Thunderbird 141. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code.