Skip to content
Fencer Vulns
high 7.2

CVE-2009-3522 json

Stack-based buffer overflow in aswMon2.sys in avast!

published 2009-10-01 17 y ago modified 2026-06-16 4 mo ago also EUVD-2009-3504

cvss
7.2
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.9%
EPSS 0.9% chance of exploitation in 30 days, percentile 61%
public exploits
1
Exploit-DB

Summary

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.

Timeline

  1. Published
  2. First public exploit (EDB-10106)

Exploit prediction

0.95% chance of exploitation in the next 30 days, higher than 61% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • EDB-10106 Avast! 4.8.1351.0 AntiVirus - 'aswMon2.sys' Kernel Memory Corruption dos, 2009-11-17
  • securityfocus.com http://www.securityfocus.com/bid/36507 referenced PoC, tagged "exploit" by a source, unverified
  • evilfingers.com https://www.evilfingers.com/advisory/Advisory/Avast_aswMon2.sys_kernel_memory_corruption_and_Local_Privilege_Escalation.php referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 2.0 7.2 AV:L/AC:L/Au:N/C:C/I:C/A:C

Classification

Weakness
  • CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.