Red Hat Security Advisory 2011-1419-01 - The kernel packages contain the Linux kernel, the core of any Linux operating system. The way IPv4 and IPv6 protocol sequence numbers and fragment IDs were generated could allow a man-in-the-middle attacker to inject packets and possibly hijack connections. Protocol sequence numbers and fragment IDs are now more random. A flaw was found in the Linux kernel's clock implementation on 32-bit, SMP systems. A local, unprivileged user could use this flaw to cause a divide error fault, resulting in a denial of service.
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