CVE-2019-9795

Critical

Description

A vulnerability where type-confusion in the IonMonkey just-in-time (JIT) compiler could potentially be used by malicious JavaScript to trigger a potentially exploitable crash. This vulnerability affects Thunderbird < 60.6, Firefox ESR < 60.6, and Firefox < 66.

SeverityCritical

CVSS9.8

Exploit probability—

Product

Mozilla Firefox

PublishedApr 26, 2019

First seenApr 26, 2019

How to fix

Update

mozilla firefox66.0 or later
mozilla firefox_esr60.6 or later
mozilla thunderbird60.6 or later

Vendor advisories

access.redhat.com/errata/RHSA-2019:0966
access.redhat.com/errata/RHSA-2019:1144

Affected products

Product	Affected versions	Fixed in
mozilla firefox	v < 66.0	66.0
mozilla firefox_esr	v < 60.6	60.6
mozilla thunderbird	v < 60.6	60.6

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