CVE-2025-7004: Avast antivirus heap buffer OOB write when scanning a malformed PE file
Heap buffer out-of-bounds write vulnerability in Avast Antivirus when scanning a malformed Windows PE 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 25040308.
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
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
Gen Digital virus definition update streamto a version that resolves this vulnerability.Fixed in VPS 25040308 - Operational
Install virus definitions VPS 25040308 or any later virus-definition update and ensure antivirus installations stay current on virus-definition updates.
Event History
Frequently Asked Questions
What is the severity of CVE-2025-7004?
The severity of CVE-2025-7004 is rated high with a score of 7.8.
How do I fix CVE-2025-7004?
To fix CVE-2025-7004, install virus definitions VPS 25040308 or any later update.
What software is affected by CVE-2025-7004?
CVE-2025-7004 affects Avast Antivirus, AVG Antivirus, Norton Antivirus, Avast One, and Avast Business Antivirus.
What type of vulnerability is CVE-2025-7004?
CVE-2025-7004 is a heap buffer out-of-bounds write vulnerability.
What can CVE-2025-7004 lead to?
CVE-2025-7004 may allow local execution of code or a denial-of-service of the antivirus process.