CVE-2025-1012

HIGH
2025-02-04 [email protected]
7.5
CVSS 3.1
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CVSS Vector

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

Lifecycle Timeline

3
Patch Released
Apr 04, 2026 - 20:30 nvd
Patch available
Analysis Generated
Mar 28, 2026 - 18:24 vuln.today
CVE Published
Feb 04, 2025 - 14:15 nvd
HIGH 7.5

Tags

Use After Free Memory Corruption Information Disclosure Mozilla Firefox Thunderbird Redhat Suse

Description

A race during concurrent delazification could have led to a use-after-free. This vulnerability affects Firefox < 135, Firefox ESR < 115.20, Firefox ESR < 128.7, Thunderbird < 128.7, and Thunderbird < 135.

Analysis

A race during concurrent delazification could have led to a use-after-free. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required. No vendor patch available.

Technical Context

This vulnerability is classified as Use After Free (CWE-416), which allows attackers to access freed memory to execute arbitrary code or crash the application. A race during concurrent delazification could have led to a use-after-free. This vulnerability affects Firefox < 135, Firefox ESR < 115.20, Firefox ESR < 128.7, Thunderbird < 128.7, and Thunderbird < 135. Affected products include: Mozilla Firefox, Mozilla Thunderbird.

Affected Products

Mozilla Firefox, Mozilla Thunderbird.

Remediation

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Use smart pointers or garbage-collected languages. Set pointers to NULL after freeing. Enable memory sanitizers.

Priority Score

38
Low Medium High Critical
KEV: 0
EPSS: +0.4
CVSS: +38
POC: 0

Vendor Status

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CVE-2025-1012 vulnerability details – vuln.today
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