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CVE-2016-9386

Publication date 23 January 2017

Last updated 24 July 2024

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

7.8 · High

Score breakdown

The x86 emulator in Xen does not properly treat x86 NULL segments as unusable when accessing memory, which might allow local HVM guest users to gain privileges via vectors involving "unexpected" base/limit values.

Read the notes from the security team

Status

Package Ubuntu Release Status
xen 17.04 zesty
Fixed 4.8.0-1ubuntu1
16.10 yakkety
Fixed 4.7.0-0ubuntu2.1
16.04 LTS xenial
Fixed 4.6.0-1ubuntu4.3
14.04 LTS trusty
Fixed 4.4.2-0ubuntu0.14.04.9
12.04 LTS precise
Fixed 4.1.6.1-0ubuntu0.12.04.13

Notes

mdeslaur

This is XSA-191

Severity score breakdown

Parameter Value
Base score 7.8 · High
Attack vector Local
Attack complexity Low
Privileges required Low
User interaction None
Scope Unchanged
Confidentiality High
Integrity impact High
Availability impact High
Vector CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H