REDHAT-BUG-2463484: High severity Mozilla Firefox ESR vulnerability

Published Apr 28, 2026
·
Updated

Memory safety bugs present in Firefox ESR 115.35.0, Firefox ESR 140.10.0, Thunderbird ESR 140.10.0, Firefox 150.0.0 and Thunderbird 150.0.0. 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 was fixed in Firefox 150.0.1, Firefox ESR 140.10.1, and Firefox ESR 115.35.1.

Affected Software

4 affected components
Mozilla Firefox ESR=115.35.0, =140.10.0
Mozilla Firefox=150.0.0
Mozilla Thunderbird ESR=140.10.0
Mozilla Thunderbird=150.0.0

Event History

Apr 28, 2026
Data Sourced
via Red Hat·03:01 PM
DescriptionSeverityAffected Software
Free Weekly Intel

Don't miss critical vulnerabilities

Join thousands of security professionals who receive our weekly digest of trending CVEs, zero-days, and exploited vulnerabilities.

No spam. Unsubscribe anytime.

Frequently Asked Questions

1

What is the severity of REDHAT-BUG-2463484?

The severity of REDHAT-BUG-2463484 is classified as high (7).

2

How do I fix REDHAT-BUG-2463484?

To fix REDHAT-BUG-2463484, update to the latest versions of Firefox ESR and Thunderbird as recommended by Mozilla.

3

What are the affected versions in REDHAT-BUG-2463484?

The affected versions in REDHAT-BUG-2463484 include Firefox ESR 115.35.0, Firefox ESR 140.10.0, Thunderbird ESR 140.10.0, Firefox 150.0.0, and Thunderbird 150.0.0.

4

What types of vulnerabilities does REDHAT-BUG-2463484 include?

REDHAT-BUG-2463484 includes memory safety bugs that may lead to memory corruption.

5

Could REDHAT-BUG-2463484 allow exploitation?

Yes, there is a presumption that some of the memory safety bugs in REDHAT-BUG-2463484 could potentially be exploited to run arbitrary code.

Contact

SecAlerts Pty Ltd.
132 Wickham Terrace
Fortitude Valley,
QLD 4006, Australia
info@secalerts.co
By using SecAlerts services, you agree to our services end-user license agreement. This website is safeguarded by reCAPTCHA and governed by the Google Privacy Policy and Terms of Service. All names, logos, and brands of products are owned by their respective owners, and any usage of these names, logos, and brands for identification purposes only does not imply endorsement. If you possess any content that requires removal, please get in touch with us.
© 2026 SecAlerts Pty Ltd.
ABN: 70 645 966 203, ACN: 645 966 203