CVE-2009-4049
HIGH · CVSS 7.2EPSS 1.1%EU EUVD
Heap-based buffer overflow in aswRdr.sys (aka the TDI RDR driver) in avast! Home and Professional 4.8.1356.0 allows local users to cause a denial of service (memory corruption) or possibly gain privileges via crafted arguments to IOCTL 0x80002024.
Key facts
- CVSS score
- 7.2 (v2.0)
- Severity
- HIGH
- CVSS vector
AV:L/AC:L/Au:N/C:C/I:C/A:C- Weakness (CWE)
- CWE-119
- EPSS score
- 1.1% (66th percentile)
- In CISA KEV
- No
- In EU EUVD
- Yes (EUVD-2009-4020)
- Published
- November 23, 2009
- NVD last modified
- June 16, 2026
- Status
- Modified
EU Vulnerability Database (EUVD)
This vulnerability is also tracked by ENISA as EUVD-2009-4020 in the EU Vulnerability Database. Last updated in EUVD on August 7, 2024.
View on the EU Vulnerability DatabaseAffected products
- avast / avast antivirus home
- avast / avast antivirus professional
References
- http://secunia.com/advisories/37368(Vendor Advisory)
- http://www.efblog.net/2009/11/avast-aswrdrsys-kernel-pool-corruption.html
- http://www.securityfocus.com/archive/1/507891/100/0/threaded
- http://www.securityfocus.com/bid/37031(Exploit)
- http://www.vupen.com/english/advisories/2009/3266(Vendor Advisory)
- https://www.evilfingers.com/advisory/Advisory/Avast_aswRdr_sys_Kernel_Pool_Corruption_and_Local_Privilege_Escalation.php
Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS
Query CVEs from your AI assistant
The CVE/NVD Explorer brain answers CVE questions directly inside Claude, ChatGPT, or any MCP assistant — always up to date, no setup. Add it once and stop pasting advisories into chat.
Add the CVE brain