REDHAT-BUG-2489221: Medium severity Mozilla Firefox vulnerability
Published Jun 16, 2026
·Updated
Memory safety bug fixed in Firefox 152. This vulnerability was fixed in Firefox 152 and Firefox ESR 140.12.
Affected Software
2 affected components
Mozilla Firefox<152
Mozilla Firefox ESR<140.12
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
firefoxto a version that resolves this vulnerability.Fixed in 152 - Upgrade
Upgrade
firefox-esrto a version that resolves this vulnerability.Fixed in 140.12
Event History
Jun 16, 2026
Data Sourced
via Red Hat·02:02 PM
DescriptionSeverityAffected Software
Frequently Asked Questions
1
What is the severity of REDHAT-BUG-2489221?
The severity of REDHAT-BUG-2489221 is medium with a risk rating of 4.
2
How do I fix REDHAT-BUG-2489221?
To fix REDHAT-BUG-2489221, update to Firefox version 152 or Firefox ESR version 140.12.
3
What type of vulnerability is REDHAT-BUG-2489221?
REDHAT-BUG-2489221 is classified as a memory safety bug.
4
In which software is REDHAT-BUG-2489221 found?
REDHAT-BUG-2489221 is found in Mozilla Firefox and Mozilla Firefox ESR.
5
When was REDHAT-BUG-2489221 published?
REDHAT-BUG-2489221 was published on June 16, 2026.