A vulnerability has been found and corrected in samba:

Stack-based buffer overflow in the (1) sid_parse and (2) dom_sid_parse
functions in Samba before 3.5.5 allows remote attackers to cause a
denial of service (crash) and possibly execute arbitrary code via a
crafted Windows Security ID (SID) on a file share (CVE-2010-3069).

The updated packages have been patched to correct this issue.