(RHSA-2016:1632) Important: kernel-rt security and bug fix update

The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements.

It was found that the RFC 5961 challenge ACK rate limiting as implemented
in the Linux kernel’s networking subsystem allowed an off-path attacker to
leak certain information about a given connection by creating congestion on
the global challenge ACK rate limit counter and then measuring the changes
by probing packets. An off-path attacker could use this flaw to either
terminate TCP connection and/or inject payload into non-secured TCP
connection between two endpoints on the network. (CVE-2016-5696, Important)

Red Hat would like to thank Yue Cao from Cyber Security Group in the CS
department of University of California, Riverside, for reporting this issue.