Unrated severityNVD Advisory· Published Nov 23, 2009· Updated Jun 16, 2026

CVE-2009-4049

Description

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.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

Avast\!/Antivirus
cpe:2.3:a:avast:avast_antivirus_home:4.8.1356.0:*:*:*:*:*:*:*
Avast\!/Avast Antivirus Professional
cpe:2.3:a:avast:avast_antivirus_professional:4.8.1356.0:*:*:*:*:*:*:*
Avast\!/aswRdr.sysllm-fuzzy
Range: = 4.8.1356.0

Patches

Vulnerability mechanics

References

www.securityfocus.com/bid/37031nvdExploit
secunia.com/advisories/37368nvdVendor Advisory
www.vupen.com/english/advisories/2009/3266nvdVendor Advisory
www.efblog.net/2009/11/avast-aswrdrsys-kernel-pool-corruption.htmlnvd
www.securityfocus.com/archive/1/507891/100/0/threadednvd
www.evilfingers.com/advisory/Advisory/Avast_aswRdr_sys_Kernel_Pool_Corruption_and_Local_Privilege_Escalation.phpnvd

News mentions

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