CVE-2025-3032

Published: Apr 1, 2025Modified: Jun 17, 2026

7.4

Vector

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

Exploitability: 2.2 / Impact: 5.2

Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0 (Secondary)

Description

Leaking of file descriptors from the fork server to web content processes could allow for privilege escalation attacks. This vulnerability was fixed in Firefox 137 and Thunderbird 137.

Affected (2)

Products: Mozilla: Firefox, Thunderbird

Mozilla

2 products

Firefox

Thunderbird

Configuration A

2 vulnerable

Vulnerable Software	Affected Versions
Mozilla Firefox	Before 137.0
Mozilla Thunderbird	Before 137.0

Related CWEs

CWE-403

Exposure of File Descriptor to Unintended Control Sphere ('File Descriptor Leak')

A process does not close sensitive file descriptors before invoking a child process, which allows the child to perform unauthorized I/O operations using those descriptors.

References (3)

https://bugzilla.mozilla.org/show_bug.cgi?id=1949987

Source: security@mozilla.org

Issue TrackingPermissions Required

https://www.mozilla.org/security/advisories/mfsa2025-20/

Source: security@mozilla.org

Vendor Advisory

https://www.mozilla.org/security/advisories/mfsa2025-23/

Source: security@mozilla.org

Vendor Advisory

Timeline

No history available yet.