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Mozilla CVE-2025-3032

HIGH
Exposure of File Descriptor to Unintended Control Sphere ('File Descriptor Leak') (CWE-403)
2025-04-01 security@mozilla.org
Privilege Escalation Mozilla
7.4
CVSS 3.1
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CVSS VectorNVD

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
None

Lifecycle Timeline

3
Patch released
Apr 05, 2026 - 20:30 nvd
Patch available
Analysis Generated
Mar 28, 2026 - 18:34 vuln.today
CVE Published
Apr 01, 2025 - 13:15 nvd
HIGH 7.4

DescriptionNVD

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

AnalysisAI

Leaking of file descriptors from the fork server to web content processes could allow for privilege escalation attacks. Rated high severity (CVSS 7.4), this vulnerability is remotely exploitable, no authentication required. No vendor patch available.

Technical ContextAI

This vulnerability is classified under CWE-403. Leaking of file descriptors from the fork server to web content processes could allow for privilege escalation attacks. This vulnerability affects Firefox < 137 and Thunderbird < 137. Affected products include: Mozilla Firefox, Mozilla Thunderbird.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.

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CVE-2025-3032 vulnerability details – vuln.today
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