What is CVE-2016-8630?

CVE-2016-8630 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10, classified as a Improper Access Control flaw (CWE-284). CVE-2016-8630 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2016-8630?

CVE-2016-8630 has a CVSS score of 5.5 out of 10, rated Medium severity. The vector string is CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

Is there a patch available for CVE-2016-8630?

No patch is currently available for CVE-2016-8630. Monitor the NIST NVD and your Linux distribution's security advisories for updates.

Is CVE-2016-8630 actively exploited?

CVE-2016-8630 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is Improper Access Control (CWE-284)?

The product does not restrict or incorrectly restricts access to a resource from an unauthorised actor. See MITRE CWE for full details: https://cwe.mitre.org/data/definitions/284.html

CVE-2016-8630

Medium

The x86_decode_insn function in arch/x86/kvm/emulate.c in the Linux kernel before 4.8.7, when KVM is enabled, allows local users to cause a denial of service (host OS crash) via a certain use of a ModR/M byte in an undefined instruction.

Package Linux Kernel

Published 2016-11-28

Last modified 2026-05-06

CVSS version 3.0

Patch available

Awaiting data

CVSS 3.0 score

5.5

out of 10

Medium

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

High

Vector string

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

Weakness type

CWE-284

CVE-2016-8630 is a Improper Access Control vulnerability

What is Improper Access Control?

The product does not restrict or incorrectly restricts access to a resource from an unauthorised actor. Learn more on MITRE CWE

References

The following references provide additional information about CVE-2016-8630 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

Red Hat
http://rhn.redhat.com/errata/RHSA-2017-0386.html
Red Hat
http://rhn.redhat.com/errata/RHSA-2017-0387.html
Kernel.org
http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.8.7

Release Notes
Openwall
http://www.openwall.com/lists/oss-security/2016/11/22/3

Mailing List Third Party Advisory
Securityfocus
http://www.securityfocus.com/bid/94459
Red Hat
https://bugzilla.redhat.com/show_bug.cgi?id=1393350

Issue Tracking
Kernel patch commit
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=d9092f52d7e61dd1557f2db2400ddb430e85937e
Patch
Kernel patch commit
https://github.com/torvalds/linux/commit/d9092f52d7e61dd1557f2db2400ddb430e85937e
Patch

Details

CVE ID CVE-2016-8630

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.0

Published 2016-11-28

Modified 2026-05-06

KEV No

Patch Awaiting data

Package linux

Frequently asked questions

What is CVE-2016-8630?

CVE-2016-8630 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 , classified as an Improper Access Control flaw (CWE-284) . CVE-2016-8630 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2016-8630?

CVE-2016-8630 has a CVSS score of 5.5 out of 10, rated Medium severity (CVSS 3.0). The vector string is CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
Is there a patch available for CVE-2016-8630?

No patch is currently available for CVE-2016-8630. Monitor the NIST NVD and your Linux distribution's security advisories for updates.
Is CVE-2016-8630 actively exploited?

No — CVE-2016-8630 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.
What is Improper Access Control (CWE-284)?

The product does not restrict or incorrectly restricts access to a resource from an unauthorised actor. View CWE-284 on MITRE CWE →