Net-SNMP is a collection of tools for generating and retrieving SNMP data.
The SNMP agent (snmpd) does not properly handle GETBULK requests with an overly large "max-repetitions" field.
A remote unauthenticated attacker could send a specially crafted SNMP request to the vulnerable application, possibly resulting in a high CPU and memory consumption.
There is no known workaround at this time.
All Net-SNMP users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=net-analyzer/net-snmp-5.4.1-r1"