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Mozilla Firefox and Firefox ESR Uninitialized Memory Vulnerability in Graphics: Canvas2D Component

Vulnerability

A vulnerability has been identified in the Graphics: Canvas2D component of Mozilla Firefox and Firefox ESR. This issue stems from uninitialized memory, which can potentially lead to undefined behavior. The vulnerability affects Firefox versions prior to 149 and Firefox ESR versions prior to 140.9.

Impact

Exploitation of this vulnerability could lead to use-after-free conditions, allowing for memory corruption and potentially arbitrary code execution.

Remediation

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

Added: Mar 24, 2026, 1:33 PM
Updated: Mar 24, 2026, 1:33 PM

Vulnerability Rating

Custom Algorithm
spread
8.4
impact
0.6
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.