ISC BIND before 9.7.2-P2, when DNSSEC validation is enabled, does not properly handle certain bad signatures if multiple trust anchors exist for a single zone, which allows remote attackers to cause a denial of service (daemon crash) via a DNS query.
http://ftp.isc.org/isc/bind9/9.7.2-P2/RELEASE-NOTES-BIND-9.7.2-P2.html
http://lists.vmware.com/pipermail/security-announce/2011/000126.html
http://support.avaya.com/css/P8/documents/100124923
http://www.debian.org/security/2010/dsa-2130
http://www.mandriva.com/security/advisories?name=MDVSA-2010:253
http://www.redhat.com/support/errata/RHSA-2010-0976.html
http://www.vmware.com/security/advisories/VMSA-2011-0004.html