CVE-2016-2070

Name: CVE-2016-2070
Creator: NVD / NIST
Published: 2016-05-02T10:59:26.673+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 3.32%

Last modified Jun 17, 2026

CVE-2016-2070 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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.. EPSS estimates a 3.32% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1

7.5/10

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

EPSS Probability

3.32%

87.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-189

Affected Software

Vendor	Product	Versions
Linux	Linux Kernel	>= 4.3, < 4.3.5

References

http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=8b8a321ff72c785ed5e8b4cf6eda20b35d427390Vendor Advisory
http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.3.5Vendor Advisory
http://www.openwall.com/lists/oss-security/2016/01/25/5Mailing List
https://bugzilla.redhat.com/show_bug.cgi?id=1302219Issue Tracking
https://github.com/torvalds/linux/commit/8b8a321ff72c785ed5e8b4cf6eda20b35d427390Patch, Vendor Advisory
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=8b8a321ff72c785ed5e8b4cf6eda20b35d427390Vendor Advisory
http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.3.5Vendor Advisory
http://www.openwall.com/lists/oss-security/2016/01/25/5Mailing List
https://bugzilla.redhat.com/show_bug.cgi?id=1302219Issue Tracking
https://github.com/torvalds/linux/commit/8b8a321ff72c785ed5e8b4cf6eda20b35d427390Patch, Vendor Advisory

Timeline

Published: May 2, 2016
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2016-2070?

How severe is CVE-2016-2070?

CVE-2016-2070 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 3.32% probability of exploitation in the next 30 days.

How do I fix CVE-2016-2070?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2016-2070?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST