spamdyke is a drop-in connection-time spam filter for qmail.
Boundary errors related to the "snprintf()" and "vsnprintf()" functions in spamdyke could cause a buffer overflow.
A remote attacker could possibly execute arbitrary code or cause a Denial of Service.
There is no known workaround at this time.
All spamdyke users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=mail-filter/spamdyke-4.3.0"