What is CVE-2016-2070?

CVE-2016-2070 is a High severity Linux kernel vulnerability with a CVSS score of 7.5 out of 10. CVE-2016-2070 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2016-2070?

CVE-2016-2070 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-2016-2070?

No patch is currently available for CVE-2016-2070. Monitor the NIST NVD and your Linux distribution's security advisories for updates.

Is CVE-2016-2070 actively exploited?

CVE-2016-2070 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2016-2070

High

The tcp_cwnd_reduction function in net/ipv4/tcp_input.c in the Linux kernel before 4.3.5 allows remote attackers to cause a denial of service (divide-by-zero error and system crash) via crafted TCP traffic.

Package Linux Kernel

Published 2016-05-02

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-189

CVE-2016-2070 is classified as CWE-189

See CWE-189 on MITRE CWE for full details on this weakness type.

References

The following references provide additional information about CVE-2016-2070 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

Kernel.org
http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.3.5

Vendor Advisory
Openwall
http://www.openwall.com/lists/oss-security/2016/01/25/5

Mailing List
Red Hat
https://bugzilla.redhat.com/show_bug.cgi?id=1302219

Issue Tracking
Kernel patch commit
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=8b8a321ff72c785ed5e8b4cf6eda20b35d427390
Patch
Kernel patch commit
https://github.com/torvalds/linux/commit/8b8a321ff72c785ed5e8b4cf6eda20b35d427390
Patch

Details

CVE ID CVE-2016-2070

Severity High

CVSS score 7.5 / 10

CVSS version 3.1

Published 2016-05-02

Modified 2026-05-06

KEV No

Patch Awaiting data

Package linux

Frequently asked questions

What is CVE-2016-2070?

CVE-2016-2070 is a High severity Linux kernel vulnerability with a CVSS score of 7.5 out of 10 . CVE-2016-2070 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2016-2070?

CVE-2016-2070 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-2016-2070?

No patch is currently available for CVE-2016-2070. Monitor the NIST NVD and your Linux distribution's security advisories for updates.
Is CVE-2016-2070 actively exploited?

No — CVE-2016-2070 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.