Daniel Veillard discovered that a specially crafted document can lead to a recursive evaluation of entities, the result being an exhaustion of memory and CPU usage

Acknowledgements:

Red Hat would like to thank Andreas Solberg for responsibly disclosing this issue.

The approxyhttpprocessresponse function in modproxyhttp.c in the modproxy module in the Apache HTTP Server 2.0.63 and 2.2.8 does not limit the number of forwarded interim responses, which allows remote HTTP servers to cause a denial of service (memory consumption) via a large number of interim responses.

Multiple race conditions in fs/pipe.c in the Linux kernel before 2.6.32-rc6 allow local users to cause a denial of service (NULL pointer dereference and system crash) or gain privileges by attempting to open an anonymous pipe via a /proc//fd/ pathname.

The execve function in the Linux kernel, possibly 2.6.30-rc6 and earlier, does not properly clear the current->clearchildtid pointer, which allows local users to cause a denial of service (memory corruption) or possibly gain privileges via a clone system call with CLONECHILDSETTID or CLONECHILDCLEARTID enabled, which is not properly handled during thread creation and exit.