What is CVE-2016-8666?

CVE-2016-8666 is a High severity Linux kernel vulnerability with a CVSS score of 7.5 out of 10, classified as a Uncontrolled Resource Consumption flaw (CWE-400). CVE-2016-8666 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2016-8666?

CVE-2016-8666 has a CVSS score of 7.5 out of 10, rated High severity. The vector string is CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Is there a patch available for CVE-2016-8666?

No patch is currently available for CVE-2016-8666. Monitor the NIST NVD and your Linux distribution's security advisories for updates.

Is CVE-2016-8666 actively exploited?

CVE-2016-8666 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is Uncontrolled Resource Consumption (CWE-400)?

The product does not properly control the amount of resources it consumes, leading to exhaustion. See MITRE CWE for full details: https://cwe.mitre.org/data/definitions/400.html

CVE-2016-8666

High

The IP stack in the Linux kernel before 4.6 allows remote attackers to cause a denial of service (stack consumption and panic) or possibly have unspecified other impact by triggering use of the GRO path for packets with tunnel stacking, as demonstrated by interleaved IPv4 headers and GRE headers, a related issue to CVE-2016-7039.

Package Linux Kernel

Published 2016-10-16

Last modified 2026-05-06

CVSS version 3.1

Patch available

Awaiting data

CVSS 3.1 score

7.5

out of 10

High

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

High

Vector string

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Weakness type

CWE-400

CVE-2016-8666 is a Uncontrolled Resource Consumption vulnerability

What is Uncontrolled Resource Consumption?

The product does not properly control the amount of resources it consumes, leading to exhaustion. Learn more on MITRE CWE

References

The following references provide additional information about CVE-2016-8666 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-2016-2047.html
Red Hat
http://rhn.redhat.com/errata/RHSA-2016-2107.html
Red Hat
http://rhn.redhat.com/errata/RHSA-2016-2110.html
Red Hat
http://rhn.redhat.com/errata/RHSA-2017-0004.html
Openwall
http://www.openwall.com/lists/oss-security/2016/10/13/11
Securityfocus
http://www.securityfocus.com/bid/93562
Red Hat
https://access.redhat.com/errata/RHSA-2017:0372
Bto
https://bto.bluecoat.com/security-advisory/sa134
Red Hat
https://bugzilla.redhat.com/show_bug.cgi?id=1384991
SUSE
https://bugzilla.suse.com/show_bug.cgi?id=1001486
Kernel patch commit
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=fac8e0f579695a3ecbc4d3cac369139d7f819971
Patch
Kernel patch commit
https://github.com/torvalds/linux/commit/fac8e0f579695a3ecbc4d3cac369139d7f819971
Patch

Details

CVE ID CVE-2016-8666

Severity High

CVSS score 7.5 / 10

CVSS version 3.1

Published 2016-10-16

Modified 2026-05-06

KEV No

Patch Awaiting data

Package linux

Frequently asked questions

What is CVE-2016-8666?

CVE-2016-8666 is a High severity Linux kernel vulnerability with a CVSS score of 7.5 out of 10 , classified as an Uncontrolled Resource Consumption flaw (CWE-400) . CVE-2016-8666 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2016-8666?

CVE-2016-8666 has a CVSS score of 7.5 out of 10, rated High severity (CVSS 3.1). The vector string is CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
Is there a patch available for CVE-2016-8666?

No patch is currently available for CVE-2016-8666. Monitor the NIST NVD and your Linux distribution's security advisories for updates.
Is CVE-2016-8666 actively exploited?

No — CVE-2016-8666 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.
What is Uncontrolled Resource Consumption (CWE-400)?

The product does not properly control the amount of resources it consumes, leading to exhaustion. View CWE-400 on MITRE CWE →