An inode data validation error was found in Linux kernels built with UDF file system (CONFIG_UDF_FS) support. An attacker able to mount a corrupted/malicious UDF file system image could cause the kernel to crash.
Linux kernel built with the UDF file system(CONFIG_UDF_FS) support is
vulnerable to a crash. It could occur while fetching inode information from a
corrupted/malicious udf file system image.
An unprivileged user could use this flaw to crash the kernel resulting in DoS.
This issue affects the versions of the Linux kernel as shipped with
Red Hat Enterprise Linux 5, 6, 7 and Red Hat Enterprise MRG 2.
This has been rated as having Moderate security impact and is not currently planned to be addressed in future updates. For additional information, refer to the Red Hat Enterprise Linux Life Cycle: https://access.redhat.com/support/policy/updates/errata/.
Red Hat would like to thank Carl H Lunde for reporting this issue.
The UDF filesystem is enabled via loading the UDF kernel module. The kernel module can be prevented from loading via blacklisting see https://access.redhat.com/solutions/41278 for more information.