Mozilla Firefox and Thunderbird Use-After-Free Vulnerability in Audio/Video Playback Component

Vulnerability

A use-after-free vulnerability has been identified in the audio/video playback component of Mozilla Firefox and Thunderbird. This issue affects Firefox versions prior to 148, Firefox ESR versions prior to 115.33 and 140.8, as well as Thunderbird versions prior to 148 and 140.8. The vulnerability arises from improper memory management, which could potentially be exploited to execute arbitrary code.

Impact

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

Remediation

Users can upgrade to Firefox 148, Firefox ESR 115.33 or 140.8, or Thunderbird 148 or 140.8 to address this vulnerability.

Added: Feb 24, 2026, 3:07 PM
Updated: Feb 24, 2026, 10:52 PM

Vulnerability Rating

Custom Algorithm
spread
8.4
impact
0.6
exploitability
4.4
remediation
7.7
relevance
3.1
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.