stack buffer overflow in the native Bluetooth stackA stack buffer overflow flaw was found in the way the Bluetooth subsystem of the Linux kernel processed pending L2CAP configuration responses from a client. On systems with the stack protection feature enabled in the kernel , an unauthenticated attacker able to initiate a connection to a system via Bluetooth could use this flaw to crash the system. Due to the nature of the stack protection feature, code execution cannot be fully ruled out, although we believe it is unlikely. On systems without the stack protection feature , an unauthenticated attacker able to initiate a connection to a system via Bluetooth could use this flaw to remotely execute arbitrary code on the system with ring 0 privileges. dereferencing NULL payload with nonzero lengthA flaw was found in the implementation of associative arrays where the add_key systemcall and KEYCTL_UPDATE operations allowed for a NULL payload with a nonzero length. When accessing the payload within this length parameters value, an unprivileged user could trivially cause a NULL pointer dereference . xfs: unprivileged user kernel oopsA flaw was found where the XFS filesystem code mishandles a user-settable inode flag in the Linux kernel prior to 4.14-rc1. This can cause a local denial of service via a kernel panic.Information leak in the scsi driverThe sg_ioctl function in 'drivers/scsi/sg.c' in the Linux kernel, from version 4.12-rc1 to 4.14-rc2, allows local users to obtain sensitive information from uninitialized kernel heap-memory locations via an SG_GET_REQUEST_TABLE ioctl call for '/dev/sg0'. kvm: nVMX: L2 guest could access hardware CR8 registerLinux kernel built with the KVM visualization support , with nested visualization feature enabled , is vulnerable to a crash due to disabled external interrupts. As L2 guest could access hardware CR8 register of the host. In a nested visualization setup, L2 guest user could use this flaw to potentially crash the host resulting in DoS