Mozilla Firefox and Firefox ESR Incorrect Boundary Conditions Vulnerability in the Layout Component

Vulnerability

A vulnerability exists in the Layout: Text and Fonts component of Mozilla Firefox and Firefox ESR. It affects Firefox versions prior to 149, as well as Firefox ESR versions prior to 115.34 and 140.9. The vulnerability arises from incorrect boundary conditions, which can lead to potential exploitation.

Impact

Exploitation of this vulnerability could result in a use-after-free condition, a type of memory corruption that can be exploited to execute arbitrary code.

Remediation

Users can upgrade to Firefox 149 or Firefox ESR 115.34 or 140.9 to address this vulnerability.

Added: Mar 24, 2026, 2:19 PM
Updated: Mar 24, 2026, 2:19 PM

Vulnerability Rating

Custom Algorithm
spread
8.4
impact
1.9
exploitability
4.4
remediation
7.7
relevance
4.6
threat
0.0
urgency
2.9
incentive
0.0

Our algorithm analyzes dozens of metrics to generate these 8 key vulnerability categories, which are then combined to calculate the overall risk score.