The em_syscall function in arch/x86/kvm/emulate.c in the KVM implementation in the Linux kernel before 3.2.14 does not properly handle the 0f05 (aka syscall) opcode, which allows guest OS users to cause a denial of service (guest OS crash) via a crafted application, as demonstrated by an NASM file.

The em_syscall function in arch/x86/kvm/emulate.c in the KVM implementation in the Linux kernel before 3.2.14 does not properly handle the 0f05 (aka syscall) opcode, which allows guest OS users to cause a denial of service (guest OS crash) via a crafted application, as demonstrated by an NASM file.

kernel: xfs: potential buffer overflow in xfs_readlink() kernel: crypto: ghash: null pointer deref if no key is set kernel: jbd/jbd2: invalid value of first log block leads to oops kernel: kvm: device assignment DoS kernel: send(m)msg: user pointer dereferences kernel: perf, powerpc: Handle events that raise an exception without overflowing kernel: kvm: pit timer with no irqchip crashes the system kernel: xfs heap overflow kernel: kvm: syscall instruction induced guest panic kernel: igmp: Avoid zero delay when receiving odd mixture of IGMP queries

Security update for Kernel

Withdrawn by the publisher.

Affected: Ubuntu:14.04:LTS: linux, Ubuntu:14.04:LTS: linux-aws, Ubuntu:14.04:LTS: linux-flo, Ubuntu:14.04:LTS: linux-goldfish, Ubuntu:14.04:LTS: linux-lts-utopic, Ubuntu:14.04:LTS: linux-lts-vivid, Ubuntu:14.04:LTS: linux-lts-wily, Ubuntu:14.04:LTS: linux-lts-xenial, Ubuntu:14.04:LTS: linux-mako, Ubuntu:14.04:LTS: linux-manta and 9 more

The em_syscall function in arch/x86/kvm/emulate.c in the KVM implementation in the Linux kernel before 3.2.14 does not properly handle the 0f05 (aka syscall) opcode, which allows guest OS users to cause a denial of service (guest OS crash) via a crafted application, as demonstrated by an NASM file.