net/ipv4/af_inet.c in Linux kernel 2.4 does not clear sockaddr_in.sin_zero before returning IPv4 socket names from the (1) getsockname, (2) getpeername, and (3) accept functions, which allows local users to obtain portions of potentially sensitive memory.
http://www.vupen.com/english/advisories/2006/4502
http://www.vmware.com/download/esx/esx-254-200610-patch.html
http://www.vmware.com/download/esx/esx-213-200610-patch.html
http://www.vmware.com/download/esx/esx-202-200610-patch.html
http://www.securityfocus.com/bid/17203
http://www.securityfocus.com/archive/1/451426/100/200/threaded
http://www.securityfocus.com/archive/1/451419/100/200/threaded
http://www.securityfocus.com/archive/1/451417/100/200/threaded
http://www.securityfocus.com/archive/1/451404/100/0/threaded
http://www.redhat.com/support/errata/RHSA-2006-0580.html
http://www.redhat.com/support/errata/RHSA-2006-0579.html
http://www.novell.com/linux/security/advisories/2006-05-31.html
http://secunia.com/advisories/22875
http://secunia.com/advisories/21035
http://secunia.com/advisories/20398