CVE-2016-4440

HIGH

Description

arch/x86/kvm/vmx.c in the Linux kernel through 4.6.3 mishandles the APICv on/off state, which allows guest OS users to obtain direct APIC MSR access on the host OS, and consequently cause a denial of service (host OS crash) or possibly execute arbitrary code on the host OS, via x2APIC mode.

References

http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=3ce424e45411cf5a13105e0386b6ecf6eeb4f66f

http://www.openwall.com/lists/oss-security/2016/05/20/2

https://bugzilla.redhat.com/show_bug.cgi?id=1337806

https://github.com/torvalds/linux/commit/3ce424e45411cf5a13105e0386b6ecf6eeb4f66f

Details

Source: MITRE

Published: 2016-06-27

Updated: 2016-06-27

Type: CWE-264

Risk Information

CVSS v2.0

Base Score: 7.2

Vector: AV:L/AC:L/Au:N/C:C/I:C/A:C

Impact Score: 10

Exploitability Score: 3.9

Severity: HIGH

CVSS v3.0

Base Score: 7.8

Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Impact Score: 5.9

Exploitability Score: 1.8

Severity: HIGH

Vulnerable Software

Configuration 1

OR

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions up to 4.6.3 (inclusive)

Tenable Plugins

View all (3 total)

IDNameProductFamilySeverity
124808EulerOS Virtualization for ARM 64 3.0.1.0 : kernel (EulerOS-SA-2019-1484)NessusHuawei Local Security Checks
critical
92178Fedora 24 : kernel (2016-d9147693a3)NessusFedora Local Security Checks
high
92055Fedora 23 : kernel (2016-06f1572324)NessusFedora Local Security Checks
high