CVE-2016-9386

xen: x86 null segments not always treated as unusable (XSA-191)

Published Jan 23, 2017 CVSS 3.0 · 7.8 High EPSS < 1% KEV · Not listed
Description
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Debian DLA Debian DLA DLA-720-1 xen security update
Debian DSA Debian DSA DSA-3729-1 xen security update
EUVD EUVD EUVD-2016-10196 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.
History

No history.

Weaknesses

Sources

Status
PUBLISHED
Assigner
mitre
Published
Updated
Aug 6, 2024, 2:50 AM
Reserved
Nov 17, 2016, 12:00 AM
Status
Modified
Published
Jan 23, 2017, 9:59 PM
Modified
Jun 17, 2026, 12:55 AM
Severity
Moderate
Public date
Nov 22, 2016, 12:00 AM