A flaw was found in the way pi to pi futex requeueing was handled. A local unprivileged user can use this flaw to increase their privileges on the system.
Acknowledgements: Red Hat would like to thank Kees Cook of Google for reporting this issue. Google acknowledges Pinkie Pie as the original reporter.
Statement: This issue did not affect the versions of the Linux kernel packages as shipped with Red Hat Enterprise Linux 5. This issue requires local system access to be exploited. We are currently not aware of any working exploit for Red Hat Enterprise Linux 6 or Red Hat Enterprise MRG 2.
Upstream commits: https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=e9c243a5a6de0be8e584c604d353412584b592f8 https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=b3eaa9fc5cd0a4d74b18f6b8dc617aeaf1873270 https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=13fbca4c6ecd96ec1a1cfa2e4f2ce191fe928a5e https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=54a217887a7b658e2650c3feff22756ab80c7339
Created kernel tracking bugs for this issue: Affects: fedora-all [bug 1105609]
kernel-3.14.6-200.fc20 has been pushed to the Fedora 20 stable repository. If problems still persist, please make note of it in this bug report.
kernel-3.14.7-100.fc19 has been pushed to the Fedora 19 stable repository. If problems still persist, please make note of it in this bug report.
This issue has been addressed in following products: Red Hat Enterprise Linux 6 Via RHSA-2014:0771 https://rhn.redhat.com/errata/RHSA-2014-0771.html
This issue has been addressed in following products: Red Hat Enterprise Linux 7 Via RHSA-2014:0786 https://rhn.redhat.com/errata/RHSA-2014-0786.html
This issue has been addressed in following products: Red Hat Enterprise Linux 6.2 AUS Via RHSA-2014:0800 https://rhn.redhat.com/errata/RHSA-2014-0800.html
IssueDescription: A flaw was found in the way the Linux kernel's futex subsystem handled the requeuing of certain Priority Inheritance (PI) futexes. A local, unprivileged user could use this flaw to escalate their privileges on the system.
This issue has been addressed in following products: Red Hat Enterprise Linux 6.4 EUS - Server and Compute Node Only Via RHSA-2014:0900 https://rhn.redhat.com/errata/RHSA-2014-0900.html
This issue has been addressed in following products: MRG for RHEL-6 v.2 Via RHSA-2014:0913 https://rhn.redhat.com/errata/RHSA-2014-0913.html