Ubuntu Security Notice USN-3879-1

Ubuntu Security Notice USN-3879-1
Ubuntu Security Notice 3879-1 – Wen Xu discovered that the ext4 file system implementation in the Linux kernel could possibly perform an out of bounds write when updating the journal for an inline file. An attacker could use this to construct a malicious ext4 image that, when mounted, could cause a denial of service. Vasily Averin and Pavel Tikhomirov discovered that the cleancache subsystem of the Linux kernel did not properly initialize new files in some situations. A local attacker could use this to expose sensitive information. Various other issues were also addressed.