CVE-2009-3522

Stack-based buffer overflow in aswMon2.sys in avast! Home and Professional for Windows 4.8.1351,...

7.2 HighPublic exploit

Stack-based buffer overflow in aswMon2.sys in avast! Home and Professional for Windows 4.8.1351, and possibly other versions before 4.8.1356, allows local users to cause a denial of service (system crash) and possibly gain privileges via a crafted IOCTL request to IOCTL 0xb2c80018.

Exploit likelihood

0.95%Down 2.3 points since Feb 4, 2022

What each source reports

NVD Score used 7.2

Record: CVE-2009-3522
CVSS 2.0: 7.2 HighAV:L/AC:L/Au:N/C:C/I:C/A:C
Weakness: CWE-119
Updated: 2026-11-02

CVE List No score

Record: CVE-2009-3522
Updated: 2026-11-02

EUVDEUVD-2009-3504 No score

Record: EUVD-2009-3504
Updated: 2026-11-03

GitHub AdvisoriesGHSA-3r45-7993-xcwr No score

Stack-based buffer overflow in aswMon2.sys in avast! Home and Professional for Windows 4.8.1351,...

Record: GHSA-3r45-7993-xcwr
Weakness: CWE-119
Updated: 2026-11-02

Affected products

Public exploits

Links only. Every CVE stores no exploit code.

Public exploits
Source	Link	Date
Exploit-DB	Avast! 4.8.1351.0 AntiVirus - 'aswMon2.sys' Kernel Memory Corruption	2009-11-17

History

History
Recorded	Changed	Sources
Nov 3, 2026	aliases	EUVD
Nov 2, 2026	first indexed	CVE List, Exploit-DB, GitHub Advisories, NVD

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2009-3522 is a high vulnerability (CVSS 7.2) in Avast Antivirus Home, published October 1, 2009. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 0.95%, the 61st percentile. No source names a fixed version.

References

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