The PowerDNS Nameserver is an authoritative-only nameserver which uses a flexible backend architecture.
A vulnerability has been reported in the DNSPacket::expand method of dnspacket.cc.
An attacker could cause a temporary Denial of Service by sending a random stream of bytes to the PowerDNS Daemon.
There is no known workaround at this time.
All PowerDNS users should upgrade to the latest version:
# emerge --sync # emerge --ask --oneshot --verbose ">=net-dns/pdns-2.9.17"