CVE-2025-8351: CWE-122 Heap-based Buffer Overflow in Gen Digital Avira Antivirus
Heap-based Buffer Overflow, Out-of-bounds Read vulnerability in Avira Antivirus engine when scanning a malformed file may allow Local Execution of Code or Denial-of-Service of the antivirus engine process. This issue affects Avira Antivirus on Windows, macOS, and Linux for engine builds before 8.3.70.98.
AI Analysis
Technical Summary
This vulnerability (CVE-2025-8351) is a heap-based buffer overflow and out-of-bounds read in the Avira Antivirus engine. It arises during the scanning of malformed files, which may lead to local code execution or denial of service of the antivirus engine process. The affected versions include engine builds prior to 8.3.70.98, specifically version 8.3.70.94. The CVSS 3.1 vector indicates local attack vector with low complexity, no privileges required, user interaction required, unchanged scope, and high impact on confidentiality, integrity, and availability.
Potential Impact
Successful exploitation can result in local execution of arbitrary code or denial of service of the antivirus engine process, potentially compromising system security and stability on affected platforms (Windows, macOS, Linux).
Mitigation Recommendations
No official patch or remediation details are provided in the available data. Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, avoid scanning untrusted or malformed files locally and monitor for updates from Gen Digital regarding this vulnerability.
CVE-2025-8351: CWE-122 Heap-based Buffer Overflow in Gen Digital Avira Antivirus
Description
Heap-based Buffer Overflow, Out-of-bounds Read vulnerability in Avira Antivirus engine when scanning a malformed file may allow Local Execution of Code or Denial-of-Service of the antivirus engine process. This issue affects Avira Antivirus on Windows, macOS, and Linux for engine builds before 8.3.70.98.
CVSS v3.1
Score 7.8high
Affected software
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2025-8351) is a heap-based buffer overflow and out-of-bounds read in the Avira Antivirus engine. It arises during the scanning of malformed files, which may lead to local code execution or denial of service of the antivirus engine process. The affected versions include engine builds prior to 8.3.70.98, specifically version 8.3.70.94. The CVSS 3.1 vector indicates local attack vector with low complexity, no privileges required, user interaction required, unchanged scope, and high impact on confidentiality, integrity, and availability.
Potential Impact
Successful exploitation can result in local execution of arbitrary code or denial of service of the antivirus engine process, potentially compromising system security and stability on affected platforms (Windows, macOS, Linux).
Mitigation Recommendations
No official patch or remediation details are provided in the available data. Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, avoid scanning untrusted or malformed files locally and monitor for updates from Gen Digital regarding this vulnerability.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- NLOK
- Date Reserved
- 2025-07-30T11:48:44.820Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 692dbca6f910530b0eb80df9
Added to database: 12/01/2025, 16:04:54 UTC
Last enriched: 06/13/2026, 08:45:13 UTC
Last updated: 09/10/2026, 19:36:52 UTC
Views: 175
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