Heap-based Buffer Overflow, Out-of-bounds Read vulnerability in Avast Antivirus on MacOS when scanning a malformed file may allow Local Execution of Code or Denial-of-Service of the anitvirus engine process.This issue affects Antivirus: from 8.3.70.94 before 8.3.70.98.
Advisories

No advisories yet.

Fixes

Solution

Upgrade to versionĀ 8.3.70.98 (13/JUN/2025) or newer.


Workaround

No workaround given by the vendor.

History

Mon, 01 Dec 2025 21:30:00 +0000

Type Values Removed Values Added
First Time appeared Apple
Apple macos
Avast
Avast antivirus
Vendors & Products Apple
Apple macos
Avast
Avast antivirus

Mon, 01 Dec 2025 16:15:00 +0000

Type Values Removed Values Added
Title Scanning a malformed file in Avast Antivirus 8.3.70.94 on MacOS may result in remote code execution
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Mon, 01 Dec 2025 16:00:00 +0000

Type Values Removed Values Added
Description Heap-based Buffer Overflow, Out-of-bounds Read vulnerability in Avast Antivirus on MacOS when scanning a malformed file may allow Local Execution of Code or Denial-of-Service of the anitvirus engine process.This issue affects Antivirus: from 8.3.70.94 before 8.3.70.98.
Weaknesses CWE-122
CWE-125
References
Metrics cvssV3_1

{'score': 9, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H'}


cve-icon MITRE

Status: PUBLISHED

Assigner: NLOK

Published:

Updated: 2025-12-01T15:59:25.248Z

Reserved: 2025-07-30T11:48:44.820Z

Link: CVE-2025-8351

cve-icon Vulnrichment

Updated: 2025-12-01T15:58:22.538Z

cve-icon NVD

Status : Received

Published: 2025-12-01T16:15:57.857

Modified: 2025-12-01T16:15:57.857

Link: CVE-2025-8351

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2025-12-01T21:27:19Z