The __qdisc_run function in net/sched/sch_generic.c in the Linux kernel before 2.6.25 on SMP machines allows local users to cause a denial of service (soft lockup) by sending a large amount of network traffic, as demonstrated by multiple simultaneous invocations of the Netperf benchmark application in UDP_STREAM mode.
git.kernel.org/?p=linux/kernel/git/stable/linux-2.6.27.y.git%3Ba=commit%3Bh=2ba2506ca7ca62c56edaa334b0fe61eb5eab6ab0
kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.25
openwall.com/lists/oss-security/2008/12/23/1
rhn.redhat.com/errata/RHSA-2009-0264.html
secunia.com/advisories/33706
secunia.com/advisories/33858
secunia.com/advisories/35011
www.debian.org/security/2009/dsa-1794
www.securityfocus.com/bid/32985
bugzilla.redhat.com/show_bug.cgi?id=477744
oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A9385
usn.ubuntu.com/714-1/