Ubuntu Security Notice USN-3880-1

Ubuntu Security Notice USN-3880-1
Ubuntu Security Notice 3880-1 – It was discovered that the CIFS client implementation in the Linux kernel did not properly handle setup negotiation during session recovery, leading to a NULL pointer exception. An attacker could use this to create a malicious CIFS server that caused a denial of service. Jann Horn discovered that the procfs file system implementation in the Linux kernel did not properly restrict the ability to inspect the kernel stack of an arbitrary task. A local attacker could use this to expose sensitive information. Various other issues were also addressed.