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Avast Antivirus NULL Pointer Dereference Vulnerability on MacOS and Linux

Vulnerability

A NULL pointer dereference vulnerability has been identified in Avast Antivirus on MacOS and Linux. When the antivirus scans a malformed Windows PE file, it causes the antivirus process to crash. This issue affects Avast Antivirus versions 16.0.0 and 3.0.3.

Impact

Exploitation of this vulnerability leads to a crash of the antivirus process, causing a denial of service.

Added: Dec 1, 2025, 5:31 PM
Updated: Dec 1, 2025, 5:31 PM

Vulnerability Rating

Custom Algorithm
spread
8.4
impact
0.6
exploitability
4.7
remediation
0.0
relevance
1.2
threat
0.0
urgency
2.9
incentive
0.8

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