CVE-2018-20976

A flaw was found in the Linux kernel’s implementation of the XFS filesystem. A key data structure (sb->s_fs_info) may not be de-allocated when the system is under memory pressure. This same data structure is then used at a later time during filesystem operations. This could allow a local attacker who is able to groom memory to place an attacker-controlled data structure in this location and create a use-after-free situation which can result in memory corruption or privilege escalation.