kernel is vulnerable to denial of service (DoS). The vulnerability exists as a flaw was found in the Linux kernel’s Performance Events implementation. It could falsely lead the NMI (Non-Maskable Interrupt) Watchdog to detect a lockup and panic the system. A local, unprivileged user could use this flaw to cause a denial of service (kernel panic) using the perf tool.
ftp.osuosl.org/pub/linux/kernel/v2.6/ChangeLog-2.6.39
git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=fc66c5210ec2539e800e87d7b3a985323c7be96e
git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=fc66c5210ec2539e800e87d7b3a985323c7be96e
www.openwall.com/lists/oss-security/2011/07/06/4
access.redhat.com/errata/RHSA-2011:1350
access.redhat.com/security/updates/classification/#important
bugzilla.redhat.com/show_bug.cgi?id=719228
docs.redhat.com/docs/en-US/Red_Hat_Enterprise_Linux/6/html/6.1_Technical_Notes/kernel.html#RHSA-2011-1350
github.com/torvalds/linux/commit/fc66c5210ec2539e800e87d7b3a985323c7be96e
rhn.redhat.com/errata/RHSA-2011-1241.html