Memory safety bugs present in Firefox 146 and Thunderbird 146. 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 affects Firefox < 147.
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Fixes

Solution

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Workaround

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History

Wed, 14 Jan 2026 11:15:00 +0000

Type Values Removed Values Added
First Time appeared Mozilla
Mozilla firefox
Mozilla thunderbird
Vendors & Products Mozilla
Mozilla firefox
Mozilla thunderbird

Wed, 14 Jan 2026 00:15:00 +0000


Tue, 13 Jan 2026 15:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-119
Metrics cvssV3_1

{'score': 9.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'}

ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Tue, 13 Jan 2026 14:00:00 +0000

Type Values Removed Values Added
Description Memory safety bugs present in Firefox 146 and Thunderbird 146. 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 affects Firefox < 147.
Title Memory safety bugs fixed in Firefox 147 and Thunderbird 147
References

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: mozilla

Published:

Updated: 2026-01-13T14:26:03.378Z

Reserved: 2026-01-13T13:30:59.693Z

Link: CVE-2026-0892

cve-icon Vulnrichment

Updated: 2026-01-13T14:23:56.154Z

cve-icon NVD

Status : Received

Published: 2026-01-13T14:16:39.723

Modified: 2026-01-13T15:16:00.917

Link: CVE-2026-0892

cve-icon Redhat

Severity : Moderate

Publid Date: 2026-01-13T13:30:59Z

Links: CVE-2026-0892 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-01-14T11:09:01Z

Weaknesses