CVE-2025-1012

HighCVSS 7.5/10Last modified Oct 5, 2026

Description

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

Metrics

CVSS 3.1 7.5/10CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-416

Affected software

No affected versions have been published.

Timeline

Published
Feb 4, 2025
Last modified
Oct 5, 2026
NVD status
Modified

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CVE-2025-1012: High severity, CVSS 7.5 | Vulnix