Reading TCP stats when using TCP Illinois congestion control algorithm can cause a divide by zero kernel oops. An unprivileged local user could use this flaw to crash the system. Proposed upstream patch: http://thread.gmane.org/gmane.linux.network/247871 Acknowledgements: This issue was discovered by Rodrigo Freire of Red Hat.
Created kernel tracking bugs for this issue Affects: fedora-all [bug 871923]
Statement: This issue did not affect the version of Linux kernel as shipped with Red Hat Enterprise Linux 5. This issue did affect the version of Linux kernel as shipped with Red Hat Enterprise Linux 6. This issue did affect the version of Linux kernel as shipped with Red Hat Enterprise MRG 2.
This issue has been addressed in following products: MRG for RHEL-6 v.2 Via RHSA-2012:1491 https://rhn.redhat.com/errata/RHSA-2012-1491.html
I believe this is commit dee1f973ca341c266229faa5a1a5bb268bed3531 upstream
This issue has been addressed in following products: Red Hat Enterprise Linux 6 Via RHSA-2012:1580 https://rhn.redhat.com/errata/RHSA-2012-1580.html