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.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
| Gen Digital | AVG Antivirus | >= 0, < 25040308CNA affecteddefault affected | |
| Gen Digital | Avast Antivirus | >= 0, < 25040308CNA affecteddefault affected | |
| Gen Digital | Avast Business Antivirus | >= 0, < 25040308CNA affecteddefault affected | |
| Gen Digital | Avast One | >= 0, < 25040308CNA affecteddefault affected | |
| Gen Digital | Norton Antivirus | >= 0, < 25040308CNA affecteddefault affected |
CVSS version used by this source: 3.1
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.
Remediation records are not available for this CVE.