A vulnerability has been found and corrected in samba:

All current released versions of Samba are vulnerable to a denial of
service caused by memory corruption. Range checks on file descriptors
being used in the FD_SET macro were not present allowing stack
corruption. This can cause the Samba code to crash or to loop
attempting to select on a bad file descriptor set (CVE-2011-0719).

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 packages have been patched to correct this issue.