The Linux kernel contains a vulnerability that may lead to
an information disclosure or a denial-of-service due to corrupted
partition tables on storage devices.
The kernel automatically evaluates partition tables of storage devices.
The code for evaluating EFI GUID partition tables contains a buffer
overflow bug that allows to leak data from the kernel heap to userspace
or that may allow to cause a kernel oops resulting in a denial of
service.
Compile and use a kernel that does not evaluate EFI GUID partition
tables. The corresponding configuration key is CONFIG_EFI_PARTITION.
A patch is available at
http://git.kernel.org/linus/fa039d5f6b126fbd65eefa05db2f67e44df8f121
https://bugzilla.redhat.com/show_bug.cgi?id=703026
When further information becomes available, this advisory will be
updated. The most recent version of this advisory is available at:
http://www.pre-cert.de/advisories/PRE-SA-2011-04.txt
PRE-CERT can be reached under [email protected]. For PGP key
information, refer to http://www.pre-cert.de/.