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CVE-2018-18883

Published: 1 November 2018

An issue was discovered in Xen 4.9.x through 4.11.x, on Intel x86 platforms, allowing x86 HVM and PVH guests to cause a host OS denial of service (NULL pointer dereference) or possibly have unspecified other impact because nested VT-x is not properly restricted.

Notes

AuthorNote
mdeslaur
hypervisor packages are in universe. For
issues in the hypervisor, add appropriate
tags to each section, ex:
Tags_xen: universe-binary

Priority

Medium

Cvss 3 Severity Score

8.8

Score breakdown

Status

Package Release Status
xen
Launchpad, Ubuntu, Debian
bionic Needed

cosmic Ignored
(end of life)
disco Ignored
(end of life)
eoan Ignored
(end of life)
focal Not vulnerable
(4.11.1-1)
trusty Does not exist
(trusty was needs-triage)
upstream
Released (4.11.1-1)
xenial Not vulnerable
(code not present)
hirsute Ignored
(end of life)
jammy Not vulnerable
(4.11.1-1)
kinetic Not vulnerable
(4.11.1-1)
groovy Ignored
(end of life)
impish Ignored
(end of life)
lunar Not vulnerable
(4.11.1-1)
mantic Not vulnerable
(4.11.1-1)
Binaries built from this source package are in Universe and so are supported by the community.

Severity score breakdown

Parameter Value
Base score 8.8
Attack vector Local
Attack complexity Low
Privileges required Low
User interaction None
Scope Changed
Confidentiality High
Integrity impact High
Availability impact High
Vector CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H