What is CVE-2016-9806?

CVE-2016-9806 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10, classified as a Race Condition flaw (CWE-362). CVE-2016-9806 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2016-9806?

CVE-2016-9806 has a CVSS score of 7.8 out of 10, rated High severity. The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Is there a patch available for CVE-2016-9806?

No patch is currently available for CVE-2016-9806. Monitor the NIST NVD and your Linux distribution's security advisories for updates.

Is CVE-2016-9806 actively exploited?

CVE-2016-9806 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is Race Condition (CWE-362)?

The product contains a code sequence that can run concurrently with other code, creating unexpected states. See MITRE CWE for full details: https://cwe.mitre.org/data/definitions/362.html

CVE-2016-9806

High

Race condition in the netlink_dump function in net/netlink/af_netlink.c in the Linux kernel before 4.6.3 allows local users to cause a denial of service (double free) or possibly have unspecified other impact via a crafted application that makes sendmsg system calls, leading to a free operation associated with a new dump that started earlier than anticipated.

Package Linux Kernel

Published 2016-12-28

Last modified 2026-05-06

CVSS version 3.1

Patch available

Awaiting data

CVSS 3.1 score

7.8

out of 10

High

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Vector string

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

Weakness type

CWE-362

CVE-2016-9806 is a Race Condition vulnerability

What is Race Condition?

The product contains a code sequence that can run concurrently with other code, creating unexpected states. Learn more on MITRE CWE

References

The following references provide additional information about CVE-2016-9806 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

Lists
http://lists.openwall.net/netdev/2016/05/15/69

Mailing List Third Party Advisory
Kernel.org
http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.6.3

Release Notes Vendor Advisory
Securityfocus
http://www.securityfocus.com/bid/94653

Third Party Advisory VDB Entry
Securitytracker
http://www.securitytracker.com/id/1037968

Third Party Advisory VDB Entry
Red Hat
https://access.redhat.com/errata/RHSA-2017:1842

Third Party Advisory
Red Hat
https://access.redhat.com/errata/RHSA-2017:2077

Third Party Advisory
Red Hat
https://access.redhat.com/errata/RHSA-2017:2669

Third Party Advisory
Source
https://source.android.com/security/bulletin/2017-03-01.html

Third Party Advisory
Kernel patch commit
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=92964c79b357efd980812c4de5c1fd2ec8bb5520
Patch
Kernel patch commit
http://www.openwall.com/lists/oss-security/2016/12/03/4
Patch
Kernel patch commit
https://bugzilla.redhat.com/show_bug.cgi?id=1401502
Patch

4 patch commits total View all on NVD

Details

CVE ID CVE-2016-9806

Severity High

CVSS score 7.8 / 10

CVSS version 3.1

Published 2016-12-28

Modified 2026-05-06

KEV No

Patch Awaiting data

Package linux

Frequently asked questions

What is CVE-2016-9806?

CVE-2016-9806 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10 , classified as a Race Condition flaw (CWE-362) . CVE-2016-9806 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2016-9806?

CVE-2016-9806 has a CVSS score of 7.8 out of 10, rated High severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
Is there a patch available for CVE-2016-9806?

No patch is currently available for CVE-2016-9806. Monitor the NIST NVD and your Linux distribution's security advisories for updates.
Is CVE-2016-9806 actively exploited?

No — CVE-2016-9806 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.
What is Race Condition (CWE-362)?

The product contains a code sequence that can run concurrently with other code, creating unexpected states. View CWE-362 on MITRE CWE →