Race condition in the ptrace and utrace support in the Linux kernel 2.6.9 through 2.6.25, as used in Red Hat Enterprise Linux (RHEL) 4, allows local users to cause a denial of service (oops) via a long series of PTRACE_ATTACH ptrace calls to another user's process that trigger a conflict between utrace_detach and report_quiescent, related to "late ptrace_may_attach() check" and "race around &dead_engine_ops setting," a different vulnerability than CVE-2007-0771 and CVE-2008-1514. NOTE: this issue might only affect kernel versions before 2.6.16.x.
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10749
https://exchange.xforce.ibmcloud.com/vulnerabilities/43567
https://bugzilla.redhat.com/show_bug.cgi?id=449359
http://www.ubuntu.com/usn/usn-625-1
http://www.securitytracker.com/id?1020362
http://www.securityfocus.com/bid/29945
http://www.openwall.com/lists/oss-security/2008/07/14/1
http://www.openwall.com/lists/oss-security/2008/06/26/1
http://securityreason.com/securityalert/3965
http://secunia.com/advisories/31107
http://secunia.com/advisories/30850
http://rhn.redhat.com/errata/RHSA-2008-0508.html