The snmp_trap_decode function in the SNMP NAT helper for Linux kernel before 2.6.16.18 allows remote attackers to cause a denial of service (crash) via unspecified remote attack vectors that cause failures in snmp_trap_decode that trigger (1) frees of random memory or (2) frees of previously-freed memory (double-free) by snmp_trap_decode as well as its calling function, as demonstrated via certain test cases of the PROTOS SNMP test suite.
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11318
https://exchange.xforce.ibmcloud.com/vulnerabilities/26594
http://www.vupen.com/english/advisories/2006/1916
http://www.ubuntu.com/usn/usn-302-1
http://www.securityfocus.com/bid/18081
http://www.redhat.com/support/errata/RHSA-2006-0617.html
http://www.redhat.com/support/errata/RHSA-2006-0580.html
http://www.redhat.com/support/errata/RHSA-2006-0437.html
http://www.novell.com/linux/security/advisories/2006_64_kernel.html
http://www.novell.com/linux/security/advisories/2006_47_kernel.html
http://www.novell.com/linux/security/advisories/2006_42_kernel.html
http://www.mandriva.com/security/advisories?name=MDKSA-2006:087
http://www.kb.cert.org/vuls/id/681569
http://www.debian.org/security/2006/dsa-1184
http://www.debian.org/security/2006/dsa-1183
http://support.avaya.com/elmodocs2/security/ASA-2006-203.htm
http://support.avaya.com/elmodocs2/security/ASA-2006-180.htm
http://securitytracker.com/id?1016153
http://secunia.com/advisories/22822
http://secunia.com/advisories/22174
http://secunia.com/advisories/22093
http://secunia.com/advisories/22082
http://secunia.com/advisories/21983
http://secunia.com/advisories/21605
http://secunia.com/advisories/21498
http://secunia.com/advisories/21179
http://secunia.com/advisories/21136
http://secunia.com/advisories/21035
http://secunia.com/advisories/20716
http://secunia.com/advisories/20225