REDHAT-BUG-2450751: High severity Mozilla Firefox vulnerability

Published Mar 24, 2026
·
Updated

Memory safety bugs present in Firefox ESR 140.8, Thunderbird ESR 140.8, Firefox 148 and Thunderbird 148. 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 < 149 and Firefox ESR < 140.9.

Affected Software

4 affected components
Mozilla Firefox<149
Mozilla Firefox ESR<140.9
Mozilla Thunderbird=148
Mozilla Thunderbird ESR=140.8

Event History

Mar 24, 2026
Data Sourced
via Red Hat·01:03 PM
DescriptionSeverityAffected Software
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Frequently Asked Questions

1

What is the severity of REDHAT-BUG-2450751?

The severity of REDHAT-BUG-2450751 is considered critical due to potential memory corruption vulnerabilities that could allow arbitrary code execution.

2

How do I fix REDHAT-BUG-2450751?

To fix REDHAT-BUG-2450751, update to the latest versions of Firefox ESR, Thunderbird ESR, Firefox, or Thunderbird that are not affected by this vulnerability.

3

Which versions are affected by REDHAT-BUG-2450751?

Versions of Firefox up to 149, Firefox ESR up to 140.9, and Thunderbird versions 148 and Thunderbird ESR 140.8 are affected by REDHAT-BUG-2450751.

4

What types of applications are impacted by REDHAT-BUG-2450751?

REDHAT-BUG-2450751 impacts the Mozilla Firefox and Mozilla Thunderbird applications, specifically the ESR and regular versions.

5

Is there any evidence of exploitation for REDHAT-BUG-2450751?

Yes, some evidence suggests that these memory safety bugs in REDHAT-BUG-2450751 could potentially be exploited to execute arbitrary code.

Contact

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