CVE-2025-10101 — Avast antivirus heap buffer OOB read when scanning a malformed Mach-O file

Description (CNA)

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 (CNA)

Vendor / product	Versions
Gen Digital / Avast Antivirus	affected 0 before 25090300
Gen Digital / AVG Antivirus	affected 0 before 25090300
Gen Digital / Norton Antivirus	affected 0 before 25090300
Gen Digital / Avast One	affected 0 before 25090300
Gen Digital / Avast Business Antivirus	affected 0 before 25090300

CWE

CWE-125

References

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

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.