CVE-2025-7011: Avast antivirus heap OOB when scanning a malformed zip file
Heap out-of-bounds read vulnerability in Avast Antivirus when scanning a malformed zip file containing XML 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 from 25020100 before 25021208.
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 25021208
Event History
Frequently Asked Questions
What is the severity of CVE-2025-7011?
CVE-2025-7011 has a high severity rating of 7.8.
How do I fix CVE-2025-7011?
To fix CVE-2025-7011, install virus definitions VPS 25021208 or any later version.
What impact does CVE-2025-7011 have on systems?
CVE-2025-7011 may allow local execution of code or cause a denial-of-service of the affected antivirus process.
Which software is affected by CVE-2025-7011?
CVE-2025-7011 affects Avast Antivirus, AVG Antivirus, Norton Antivirus, Avast One, and Avast Business Antivirus.
Is CVE-2025-7011 a common vulnerability?
CVE-2025-7011 identifies a specific heap out-of-bounds read vulnerability related to malformed zip file scanning.