Heap-Based Buffer Overflow in Avast Antivirus on MacOS
CVE-2025-8351

9CRITICAL

Key Information:

Vendor

Avast

Status
Antivirus
Vendor
CVE Published:
1 December 2025

What is CVE-2025-8351?

A vulnerability exists in Avast Antivirus on MacOS that triggers a heap-based buffer overflow when scanning a specially crafted file. This flaw could lead to local code execution or cause a Denial-of-Service, impacting the antivirus engine's process. The issue resides in versions 8.3.70.94 through 8.3.70.98, making it crucial for users to upgrade to the latest version to mitigate potential risks.

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Affected Version(s)

Antivirus MacOS 8.3.70.94

References

https://www.gendigital.com/us/en/contact-us/security-advi...

CVSS V3.1

Score:
9
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
High
Privileges Required:
None
User Interaction:
None
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Mike Zhang
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