Multiple vulnerabilities were discovered and corrected in clamav:

Multiple unspecified vulnerabilities in pdf.c in libclamav in ClamAV
before 0.96.5 allow remote attackers to cause a denial of service
(application crash) or possibly execute arbitrary code via a crafted
PDF document (CVE-2010-4260, (CVE-2010-4479).

Off-by-one error in the icon_cb function in pe_icons.c in libclamav
in ClamAV before 0.96.5 allows remote attackers to cause a denial of
service (memory corruption and application crash) or possibly execute
arbitrary code via unspecified vectors. NOTE: some of these details
are obtained from third party information (CVE-2010-4261).

Packages for 2009.0 are provided as of the Extended Maintenance
Program. Please visit this link to learn more:
http://store.mandriva.com/product_info.php?cPath=149&products_id=490

The updated clamav packages have been upgraded to the 0.96.5 version
that is not vulnerable to these issues.