REDHAT-BUG-2442318: High severity Mozilla Firefox vulnerability

Published Feb 24, 2026
·
Updated

Memory safety bugs present in Firefox ESR 140.7, Thunderbird ESR 140.7, Firefox 147 and Thunderbird 147. 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 < 148 and Firefox ESR < 140.8.

Affected Software

4 affected components
Mozilla Firefox<148
Mozilla Firefox ESR<140.8
Mozilla Thunderbird
Mozilla Thunderbird ESR

Event History

Feb 24, 2026
Data Sourced
via Red Hat·02:04 PM
DescriptionSeverityAffected Software
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Frequently Asked Questions

1

What is the severity of REDHAT-BUG-2442318?

The severity of REDHAT-BUG-2442318 is considered high due to potential memory corruption and the possibility of arbitrary code execution.

2

How do I fix REDHAT-BUG-2442318?

To fix REDHAT-BUG-2442318, update your Mozilla Firefox or Thunderbird to the latest version beyond the affected releases.

3

Which versions are affected by REDHAT-BUG-2442318?

REDHAT-BUG-2442318 affects Mozilla Firefox versions up to 148, and Mozilla Thunderbird versions that have not been specified for this vulnerability.

4

Can REDHAT-BUG-2442318 be exploited remotely?

Yes, there is potential for REDHAT-BUG-2442318 to be exploited remotely, which increases the risk of arbitrary code execution.

5

What are the products affected by REDHAT-BUG-2442318?

The products affected by REDHAT-BUG-2442318 include Mozilla Firefox, Firefox ESR, Mozilla Thunderbird, and Thunderbird ESR.

Contact

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