CVE-2025-14330

CRITICAL

Firefox < 146.0 and 140.6-140.* - Memory Corruption in JIT Component

Title source: llm
STIX 2.1

Description

JIT miscompilation in the JavaScript Engine: JIT component. This vulnerability was fixed in Firefox 146, Firefox ESR 140.6, Thunderbird 146, and Thunderbird 140.6.

References (5)

Core 5

Scores

CVSS v3 9.8
EPSS 0.0042
EPSS Percentile 33.5%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable yes
Technical Impact total

Details

CWE
CWE-119 CWE-686 CWE-843
Status published
Products (8)
mozilla/firefox < 140.6.0
mozilla/firefox < 146.0
Mozilla/Firefox 140.6 - 140.*
Mozilla/Firefox 146
mozilla/thunderbird < 140.6.0
mozilla/thunderbird < 146.0
Mozilla/Thunderbird 140.6 - 140.*
Mozilla/Thunderbird 146
Published Dec 09, 2025
Tracked Since Feb 18, 2026