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CVE-2017-12154

Public on 2017-09-26
Modified on 2017-10-26
Description

Linux kernel built with the KVM visualization support (CONFIG_KVM), with nested visualization (nVMX) feature enabled (nested=1), is vulnerable to a crash due to disabled external interrupts. As L2 guest could access (r/w) hardware CR8 register of the host(L0). In a nested visualization setup, L2 guest user could use this flaw to potentially crash the host(L0) resulting in DoS.

Severity
Important
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CVSS v3 Base Score
5.8
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Affected Packages

Platform Package Release Date Advisory
Amazon Linux 1 kernel 2017-10-26 16:43 ALAS-2017-914

CVSS Scores

Score Type Score Vector
Amazon Linux CVSSv2 4.3 AV:A/AC:H/Au:S/C:N/I:N/A:C
Amazon Linux CVSSv3 5.8 CVSS:3.0/AV:A/AC:H/PR:L/UI:N/S:C/C:N/I:N/A:H
NVD CVSSv2 3.6 AV:L/AC:L/Au:N/C:P/I:P/A:N
NVD CVSSv3 7.1 CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N