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CVE-2016-3157

kernel: xen: Privilege escalation on 64-bit Xen PV domains with IO port access privileges (XSA-171)

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Severity

Moderate

Red Hat Product Security

7

CVSS 3.0

Review impact separately from score.

Published · March 16, 2016

Updated · June 28, 2026

Description

A flaw in the Linux kernel was found in the way IOPL was handled during context switches in 64-bit Xen PV guests. A local guest user could potentially use this flaw to escalate their privileges in the guest.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CVSS 3.0 · 7
CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS 2.0 · 6.9
AV:L/AC:M/Au:N/C:C/I:C/A:C

CWE-250 · Execution with Unnecessary Privileges