CVE-2025-9179

CriticalCVSS 9.8/10Last modified Oct 5, 2026

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. This vulnerability was fixed in Firefox 142, Firefox ESR 115.27, Firefox ESR 128.14, Firefox ESR 140.2, Thunderbird 142, Thunderbird 128.14, and Thunderbird 140.2.

Metrics

CVSS 3.1 9.8/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-119

Affected software

Vendor	Product	Versions
Mozilla	Firefox	—
Mozilla	Thunderbird	—

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1979527Issue Tracking, Permissions Required
https://www.mozilla.org/security/advisories/mfsa2025-64/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2025-65/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2025-66/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2025-67/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2025-70/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2025-71/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2025-72/Vendor Advisory
https://lists.debian.org/debian-lts-announce/2025/08/msg00016.html
https://lists.debian.org/debian-lts-announce/2025/08/msg00018.html

Timeline

Published: Aug 19, 2025
Last modified: Oct 5, 2026
NVD status: Modified

Related CVEs from 2025

CVE-2025-91808.1Same-origin policy bypass in the Graphics: Canvas2D component. This vulnerability was fixed in Firefox 142, Firefox ESR 115.27, Firefox ESR CVE-2025-91816.5Uninitialized memory in the JavaScript Engine component. This vulnerability was fixed in Firefox 142, Firefox ESR 128.14, Firefox ESR 140.2,CVE-2025-91827.5Denial-of-service due to out-of-memory in the Graphics: WebRender component. This vulnerability was fixed in Firefox 142, Firefox ESR 140.2,CVE-2025-91836.5Spoofing issue in the Address Bar component. This vulnerability was fixed in Firefox 142 and Firefox ESR 140.2.CVE-2025-91848.1Memory safety bugs present in Firefox ESR 140.1, Thunderbird ESR 140.1, Firefox 141 and Thunderbird 141. Some of these bugs showed evidence CVE-2025-91858.1Memory safety bugs present in Firefox ESR 115.26, Firefox ESR 128.13, Thunderbird ESR 128.13, Firefox ESR 140.1, Thunderbird ESR 140.1, Fire CVE-2025-91866.5Spoofing issue in the Address Bar component of Firefox Focus for Android. This vulnerability was fixed in Firefox 142.CVE-2025-91879.8Memory safety bugs present in Firefox 141 and Thunderbird 141. Some of these bugs showed evidence of memory corruption and we presume that w CVE-2025-91887.8There is a deserialization of untrusted data vulnerability in Digilent DASYLab. This vulnerability may result in arbitrary code execution. CVE-2025-91897.8There is an out of bounds write vulnerability due to improper bounds checking resulting in a large destination address when parsing a DSB fi CVE-2025-91904.8The configuration of Cursor on macOS, specifically the "RunAsNode" fuse enabled, allows a local attacker with unprivileged access to execute CVE-2025-91916.3The Houzez theme for WordPress is vulnerable to PHP Object Injection in all versions up to, and including, 4.1.6 via deserialization of untr