The utrace support in Linux kernel 2.6.18, and other versions, allows local users to cause a denial of service (system hang) related to "MT exec + utrace_attach spin failure mode," as demonstrated by ptrace-thrash.c.Referenceshttps://exchange.xforce.ibmcloud.com/vulnerabilities/34128http://securitytracker.com/id?1017979http://www.securityfocus.com/bid/23720https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A9447http://osvdb.org/35927http://www.redhat.com/support/errata/RHSA-2007-0169.htmlhttps://bugzilla.redhat.com/show_bug.cgi?id=228816http://secunia.com/advisories/25080https://bugzilla.redhat.com/show_bug.cgi?id=227952
