Ubuntu Security Notice USN-5384-1

Ubuntu Security Notice 5384-1 - It was discovered that the UDF file system implementation in the Linux kernel could attempt to dereference a null pointer in some situations. An attacker could use this to construct a malicious UDF image that, when mounted and operated on, could cause a denial of service. Lyu Tao discovered that the NFS implementation in the Linux kernel did not properly handle requests to open a directory on a regular file. A local attacker could use this to expose sensitive information.