CVE-2025-10101: Avast antivirus heap buffer OOB read when scanning a malformed Mach-O file
Heap buffer out-of-bounds read vulnerability in Avast Antivirus when scanning a malformed Mach-O file may allow Local Execution of Code or Denial-of-Service of the antivirus process.
This issue affects Avast Antivirus, AVG Antivirus, Norton Antivirus, Avast One, and Avast Business Antivirus on Windows, macOS, and Linux for virus definition builds before VPS 25090300.
The affected scanning logic is delivered through a shared Gen Digital virus definition update stream. The same stream feeds the consumer antivirus products listed in this advisory and other Gen Digital products that embed the same engine. Mitigation flows through this update channel; installations at or above the listed build are not vulnerable regardless of which product consumes the stream.
Affected Software
Remediation
Information
Event History
Frequently Asked Questions
What is the severity of CVE-2025-10101?
CVE-2025-10101 has a high severity due to its potential for local code execution and denial of service.
How do I fix CVE-2025-10101?
To fix CVE-2025-10101, update Avast Antivirus to the latest version released after March 9, 2025.
Who is affected by CVE-2025-10101?
CVE-2025-10101 affects users of Avast Antivirus on MacOS, specifically versions from 15.7 before 3.9.2025.
What are the potential impacts of CVE-2025-10101?
The potential impacts of CVE-2025-10101 include local execution of malicious code and disruption of antivirus protection.
Is CVE-2025-10101 a remote or local vulnerability?
CVE-2025-10101 is a local vulnerability that requires direct access to the affected system.