Updated kernel packages that fix three security issues and several bugs arenow available for Red Hat Enterprise Linux 6.The Red Hat Security Response Team has rated this update as having moderatesecurity impact. Common Vulnerability Scoring System base scores,which give detailed severity ratings, are available for each vulnerabilityfrom the CVE links in the References section. The kernel packages contain the Linux kernel, the core of any Linuxoperating system.This update fixes the following security issues:* It was found that a deadlock could occur in the Out of Memory killer. A process could trigger this deadlock by consuming a large amountof memory, and then causing request_module to be called. A local,unprivileged user could use this flaw to cause a denial of service. * A flaw was found in the way the KVM subsystem handled guests attempting to run with the X86_CR4_OSXSAVE CPUfeature flag set. On hosts without the XSAVE CPU feature, a local,unprivileged user could use this flaw to crash the host system. * A memory disclosure flaw was found in the way the load_script functionin the binfmt_script binary format handler handled excessive recursions. Alocal, unprivileged user could use this flaw to leak kernel stack memory touser-space by executing specially-crafted scripts. Red Hat would like to thank Tetsuo Handa for reporting CVE-2012-4398, andJon Howell for reporting CVE-2012-4461.This update also fixes several bugs. Documentation for these changes willbe available shortly from the Technical Notes document linked to in theReferences section.Users should upgrade to these updated packages, which contain backportedpatches to correct these issues, and fix the bugs noted in the TechnicalNotes. The system must be rebooted for this update to take effect.