{"cve":"CVE-2009-3523","nvd":{"published":"2009-10-01T17:00:00.267","modified":"2026-06-16T23:11:46.493","status":"Modified","description":"aavmKer4.sys in avast! Home and Professional for Windows before 4.8.1356 does not properly validate input to IOCTLs (1) 0xb2d6000c and (2) 0xb2d60034, which allows local users to gain privileges via IOCTL requests using crafted kernel addresses that trigger memory corruption, a different vulnerability than CVE-2008-1625.","cvss_v4":null,"cvss_v3":null,"cwes":["CWE-20"],"references":["http://secunia.com/advisories/36858","http://www.avast.com/eng/avast-4-home_pro-revision-history.html","http://www.ntinternals.org/ntiadv0904/ntiadv0904.html","https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6024","http://secunia.com/advisories/36858"],"products":["avast:avast_antivirus_home","avast:avast_antivirus_professional"],"source":"nvd","synced_at":"2026-10-19T19:54:26.868835795+00:00"},"epss":{"cve":"CVE-2009-3523","score":0.00781,"percentile":0.55965,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}