CVE-2016-8630

Published: 27 November 2016

The x86_decode_insn function in arch/x86/kvm/emulate.c in the Linux kernel before 4.8.7, when KVM is enabled, allows local users to cause a denial of service (host OS crash) via a certain use of a ModR/M byte in an undefined instruction.

From the Ubuntu security team

It was discovered that the KVM implementation for x86/x86_64 in the Linux kernel could dereference a null pointer. An attacker in a guest virtual machine could use this to cause a denial of service (system crash) in the KVM host.

Priority

Medium

CVSS 3 base score: 5.5

Status

Package Release Status
linux
Launchpad, Ubuntu, Debian
Upstream
Released (4.9~rc4)
Patches:
Introduced by 41061cdb98a0bec464278b4db8e894a3121671f5
Fixed by d9092f52d7e61dd1557f2db2400ddb430e85937e
linux-armadaxp
Launchpad, Ubuntu, Debian
Upstream
Released (4.9~rc4)
This package is not directly supported by the Ubuntu Security Team
linux-aws
Launchpad, Ubuntu, Debian
Upstream
Released (4.9~rc4)
linux-azure
Launchpad, Ubuntu, Debian
Upstream
Released (4.9~rc4)
linux-euclid
Launchpad, Ubuntu, Debian
Upstream
Released (4.9~rc4)
linux-flo
Launchpad, Ubuntu, Debian
Upstream
Released (4.9~rc4)
linux-gcp
Launchpad, Ubuntu, Debian
Upstream
Released (4.9~rc4)
linux-gke
Launchpad, Ubuntu, Debian
Upstream
Released (4.9~rc4)
linux-goldfish
Launchpad, Ubuntu, Debian
Upstream
Released (4.9~rc4)
linux-grouper
Launchpad, Ubuntu, Debian
Upstream
Released (4.9~rc4)
linux-hwe
Launchpad, Ubuntu, Debian
Upstream
Released (4.9~rc4)
linux-hwe-edge
Launchpad, Ubuntu, Debian
Upstream
Released (4.9~rc4)
linux-kvm
Launchpad, Ubuntu, Debian
Upstream
Released (4.9~rc4)
linux-linaro-omap
Launchpad, Ubuntu, Debian
Upstream
Released (4.9~rc4)
linux-linaro-shared
Launchpad, Ubuntu, Debian
Upstream
Released (4.9~rc4)
linux-linaro-vexpress
Launchpad, Ubuntu, Debian
Upstream
Released (4.9~rc4)
linux-lts-quantal
Launchpad, Ubuntu, Debian
Upstream
Released (4.9~rc4)
This package is not directly supported by the Ubuntu Security Team
linux-lts-raring
Launchpad, Ubuntu, Debian
Upstream
Released (4.9~rc4)
linux-lts-saucy
Launchpad, Ubuntu, Debian
Upstream
Released (4.9~rc4)
This package is not directly supported by the Ubuntu Security Team
linux-lts-trusty
Launchpad, Ubuntu, Debian
Upstream
Released (4.9~rc4)
linux-lts-utopic
Launchpad, Ubuntu, Debian
Upstream
Released (4.9~rc4)
linux-lts-vivid
Launchpad, Ubuntu, Debian
Upstream
Released (4.9~rc4)
linux-lts-wily
Launchpad, Ubuntu, Debian
Upstream
Released (4.9~rc4)
linux-lts-xenial
Launchpad, Ubuntu, Debian
Upstream
Released (4.9~rc4)
linux-maguro
Launchpad, Ubuntu, Debian
Upstream
Released (4.9~rc4)
linux-mako
Launchpad, Ubuntu, Debian
Upstream
Released (4.9~rc4)
linux-manta
Launchpad, Ubuntu, Debian
Upstream
Released (4.9~rc4)
linux-oem
Launchpad, Ubuntu, Debian
Upstream
Released (4.9~rc4)
linux-qcm-msm
Launchpad, Ubuntu, Debian
Upstream
Released (4.9~rc4)
linux-raspi2
Launchpad, Ubuntu, Debian
Upstream
Released (4.9~rc4)
linux-snapdragon
Launchpad, Ubuntu, Debian
Upstream
Released (4.9~rc4)
linux-ti-omap4
Launchpad, Ubuntu, Debian
Upstream
Released (4.9~rc4)