Debian DSA-4232-1 : xen - security update

medium Nessus Plugin ID 110624
New! Plugin Severity Now Using CVSS v3

The calculated severity for Plugins has been updated to use CVSS v3 by default. Plugins that do not have a CVSS v3 score will fall back to CVSS v2 for calculating severity. Severity display preferences can be toggled in the settings dropdown.


The remote Debian host is missing a security-related update.


This update provides mitigations for the 'lazy FPU' vulnerability affecting a range of Intel CPUs, which could result in leaking CPU register states belonging to another vCPU previously scheduled on the same CPU. For additional information please refer to


Upgrade the xen packages.

For the stable distribution (stretch), this problem has been fixed in version 4.8.3+xsa267+shim4.10.1+xsa267-1+deb9u8.

See Also

Plugin Details

Severity: Medium

ID: 110624

File Name: debian_DSA-4232.nasl

Version: 1.5

Type: local

Agent: unix

Published: 6/21/2018

Updated: 11/13/2018

Dependencies: ssh_get_info.nasl

Risk Information


Risk Factor: Medium

Score: 5.2


Risk Factor: Medium

Base Score: 4.7

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


Risk Factor: Medium

Base Score: 5.6

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

Vulnerability Information

CPE: p-cpe:/a:debian:debian_linux:xen, cpe:/o:debian:debian_linux:9.0

Required KB Items: Host/local_checks_enabled, Host/Debian/release, Host/Debian/dpkg-l

Patch Publication Date: 6/20/2018

Reference Information

CVE: CVE-2018-3665

DSA: 4232