REDHAT-BUG-2503439: High severity Mozilla Firefox vulnerability
JIT miscompilation in the JavaScript Engine: JIT component. This vulnerability was fixed in Firefox 153, Firefox ESR 115.38, and Firefox ESR 140.13.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
Firefoxto a version that resolves this vulnerability.Fixed in 153 - Upgrade
Upgrade
Firefox ESRto a version that resolves this vulnerability.Fixed in 115.38 - Upgrade
Upgrade
Firefox ESRto a version that resolves this vulnerability.Fixed in 140.13
Event History
Frequently Asked Questions
What is the severity of REDHAT-BUG-2503439?
The severity of REDHAT-BUG-2503439 is classified as high, with a score of 7.
How do I fix REDHAT-BUG-2503439?
REDHAT-BUG-2503439 can be fixed by updating to Firefox version 153 or higher, Firefox ESR 115.38 or higher, or Firefox ESR 140.13 or higher.
What does REDHAT-BUG-2503439 affect?
REDHAT-BUG-2503439 affects the JavaScript Engine due to JIT miscompilation issues in Mozilla Firefox.
When was REDHAT-BUG-2503439 published?
REDHAT-BUG-2503439 was published on July 21, 2026.
Where can I find more information about REDHAT-BUG-2503439?
For more information about REDHAT-BUG-2503439, you can refer to the related Red Hat advisories.