PatchGap
Firefox · Core

CVE-2026-0892

Memory Corruption in Core
Medium firefox Memory Corruption

Overview

Medium
Severity
—
CVSS
No
Exploited ITW
Embargoed
Fix Status
Impactmoderate
DescriptionMemory 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.
ComponentCore
Bug ClassMemory Corruption
Tracker1986912
CISA KEVNot listed
CreditedHiroyuki Ikezoe, Jon Coppeard, Maurice Dauer and the Mozilla Fuzzing Team
Disclosed2026-01-13

Fix not yet public

No public source fix for this bug has been identified on the main branch yet — it is embargoed or not yet disclosed. Root-cause analysis is withheld until the fix commit is available.
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