CVE-2025-0247

CriticalCVSS 9.8/10Last modified Oct 5, 2026

Description

Memory safety bugs present in Firefox 133 and Thunderbird 133. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox 134 and Thunderbird 134.

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

Affected software

No affected versions have been published.

Timeline

Published
Jan 7, 2025
Last modified
Oct 5, 2026
NVD status
Modified

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CVE-2025-0247: Critical severity, CVSS 9.8 | Vulnix