CVE-2016-1571

The paging_invlpg function in include/asm-x86/paging.h in Xen 3.3.x through 4.6.x, when using shadow mode paging or nested virtualization is enabled, allows local HVM guest users to cause a denial of service (host crash) via a non-canonical guest address in an INVVPID instruction, which triggers a hypervisor bug check.

Published: 2016-01-22 Last update: 2026-05-06 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2016-1571 is rated Moderate Risk (49.3/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 1.28%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2016-1571

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.30% 1.28% +0.98%
2 2025-07-05 0.43% 0.30% -0.14%
3 2025-03-30 — 0.43% —

Full EPSS history (8 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2016-1571

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
6.3 3.0 MEDIUM
CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:C/C:N/I:N/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:H)
Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work.
Privileges required (PR:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:C)
Breaking this can reach past the original component and bite other resources—bigger blast radius.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 1.8 4.0 [email protected]
4.7 2.0 MEDIUM
AV:L/AC:M/Au:N/C:N/I:N/A:C Click to expand
Access vector (AV:L)
Requires local access to the target system.
Access complexity (AC:M)
Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:C)
Complete availability impact.
 3.4 6.9 [email protected]

Weakness enumeration for CVE-2016-1571

OS Trackers for CVE-2016-1571

vendor priority summary link
debian not yet assigned CVE-2016-1571 not yet assigned priority: Debian including 1 source packages (xen), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2016-1571
redhat high — https://access.redhat.com/security/cve/CVE-2016-1571
ubuntu medium CVE-2016-1571 medium priority: Ubuntu including 1 source packages (xen), 5 status rows across 5 suites (precise, trusty, upstream, vivid, wily): released 3, ignored 1, needed 1. https://ubuntu.com/security/CVE-2016-1571

Affected software / configurations for CVE-2016-1571

Vendor Product Version Raw CPE
citrix xenserver <= 6.5 cpe:2.3:a:citrix:xenserver:*:sp1:*:*:*:*:*:*
xen xen 3.3.0 cpe:2.3:o:xen:xen:3.3.0:*:*:*:*:*:*:*
xen xen 3.3.1 cpe:2.3:o:xen:xen:3.3.1:*:*:*:*:*:*:*
xen xen 3.3.2 cpe:2.3:o:xen:xen:3.3.2:*:*:*:*:*:*:*
xen xen 3.4.0 cpe:2.3:o:xen:xen:3.4.0:*:*:*:*:*:*:*
xen xen 3.4.1 cpe:2.3:o:xen:xen:3.4.1:*:*:*:*:*:*:*
xen xen 3.4.2 cpe:2.3:o:xen:xen:3.4.2:*:*:*:*:*:*:*
xen xen 3.4.3 cpe:2.3:o:xen:xen:3.4.3:*:*:*:*:*:*:*
xen xen 3.4.4 cpe:2.3:o:xen:xen:3.4.4:*:*:*:*:*:*:*
xen xen 4.1.0 cpe:2.3:o:xen:xen:4.1.0:*:*:*:*:*:*:*
xen xen 4.1.1 cpe:2.3:o:xen:xen:4.1.1:*:*:*:*:*:*:*
xen xen 4.1.2 cpe:2.3:o:xen:xen:4.1.2:*:*:*:*:*:*:*
xen xen 4.1.3 cpe:2.3:o:xen:xen:4.1.3:*:*:*:*:*:*:*
xen xen 4.1.4 cpe:2.3:o:xen:xen:4.1.4:*:*:*:*:*:*:*
xen xen 4.1.5 cpe:2.3:o:xen:xen:4.1.5:*:*:*:*:*:*:*
xen xen 4.1.6 cpe:2.3:o:xen:xen:4.1.6:*:*:*:*:*:*:*
xen xen 4.1.6.1 cpe:2.3:o:xen:xen:4.1.6.1:*:*:*:*:*:*:*
xen xen 4.2.0 cpe:2.3:o:xen:xen:4.2.0:*:*:*:*:*:*:*
xen xen 4.2.1 cpe:2.3:o:xen:xen:4.2.1:*:*:*:*:*:*:*
xen xen 4.2.2 cpe:2.3:o:xen:xen:4.2.2:*:*:*:*:*:*:*
xen xen 4.2.3 cpe:2.3:o:xen:xen:4.2.3:*:*:*:*:*:*:*
xen xen 4.2.4 cpe:2.3:o:xen:xen:4.2.4:*:*:*:*:*:*:*
xen xen 4.2.5 cpe:2.3:o:xen:xen:4.2.5:*:*:*:*:*:*:*
xen xen 4.3.0 cpe:2.3:o:xen:xen:4.3.0:*:*:*:*:*:*:*
xen xen 4.3.1 cpe:2.3:o:xen:xen:4.3.1:*:*:*:*:*:*:*
xen xen 4.3.2 cpe:2.3:o:xen:xen:4.3.2:*:*:*:*:*:*:*
xen xen 4.3.3 cpe:2.3:o:xen:xen:4.3.3:*:*:*:*:*:*:*
xen xen 4.3.4 cpe:2.3:o:xen:xen:4.3.4:*:*:*:*:*:*:*
xen xen 4.4.0 cpe:2.3:o:xen:xen:4.4.0:*:*:*:*:*:*:*
xen xen 4.4.0 cpe:2.3:o:xen:xen:4.4.0:rc1:*:*:*:*:*:*
xen xen 4.4.1 cpe:2.3:o:xen:xen:4.4.1:*:*:*:*:*:*:*
xen xen 4.4.2 cpe:2.3:o:xen:xen:4.4.2:*:*:*:*:*:*:*
xen xen 4.4.3 cpe:2.3:o:xen:xen:4.4.3:*:*:*:*:*:*:*
xen xen 4.5.0 cpe:2.3:o:xen:xen:4.5.0:*:*:*:*:*:*:*
xen xen 4.5.1 cpe:2.3:o:xen:xen:4.5.1:*:*:*:*:*:*:*
xen xen 4.5.2 cpe:2.3:o:xen:xen:4.5.2:*:*:*:*:*:*:*
xen xen 4.6.0 cpe:2.3:o:xen:xen:4.6.0:*:*:*:*:*:*:*

References for CVE-2016-1571

cvelogic Threat Intelligence