From the Red Hat advisory: The possibility of a kernel crash was found in the Linux kernel IPsec protocol implementation, due to improper handling of fragmented ESP packets. When an attacker controlling an intermediate router fragmented these packets into very small pieces, it would cause a kernel crash on the receiving node during packet reassembly. (CVE-2007-6282) Also, on 64-bit architectures, the possibility of a timer-expiration value
overflow was found in the Linux kernel high-resolution timers functionality, hrtimer. This could allow a local unprivileged user to setup
a large interval value, forcing the timer expiry value to become negative,
causing a denial of service (kernel hang). (CVE-2007-6712)
