CVE & CISA-KEV Catalog

CVE-2016-6828

MEDIUM
5.5
CVSS v3
NVD

Description

The tcp_check_send_head function in include/net/tcp.h in the Linux kernel before 4.7.5 does not properly maintain certain SACK state after a failed data copy, which allows local users to cause a denial of service (tcp_xmit_retransmit_queue use-after-free and system crash) via a crafted SACK option.

CWE-416Use After Free

How to fix

Remediation Available
linuxDebian
Fixed in:4.7.2-1CVE-2016-6828
Fixed in:4.7.2-1CVE-2016-6828
Fixed in:4.7.2-1CVE-2016-6828
Fixed in:4.7.2-1CVE-2016-6828
linuxUbuntu
Fixed in:3.13.0-98.145USN-3098-1
Fixed in:4.4.0-42.62USN-3099-1
linux-image-3.13.0-98-genericUbuntu
Fixed in:3.13.0-98.145USN-3098-1
linux-image-3.13.0-98-generic-lpaeUbuntu
Fixed in:3.13.0-98.145USN-3098-1
linux-image-3.13.0-98-lowlatencyUbuntu
Fixed in:3.13.0-98.145USN-3098-1
linux-image-3.13.0-98-powerpc-e500Ubuntu
Fixed in:3.13.0-98.145USN-3098-1
linux-image-3.13.0-98-powerpc-e500mcUbuntu
Fixed in:3.13.0-98.145USN-3098-1
linux-image-3.13.0-98-powerpc-smpUbuntu
Fixed in:3.13.0-98.145USN-3098-1
linux-image-3.13.0-98-powerpc64-embUbuntu
Fixed in:3.13.0-98.145USN-3098-1
linux-image-3.13.0-98-powerpc64-smpUbuntu
Fixed in:3.13.0-98.145USN-3098-1
linux-image-4.4.0-1027-raspi2Ubuntu
Fixed in:4.4.0-1027.33USN-3099-3
linux-image-4.4.0-1030-snapdragonUbuntu
Fixed in:4.4.0-1030.33USN-3099-4
linux-image-4.4.0-42-genericUbuntu
Fixed in:4.4.0-42.62~14.04.1USN-3099-2
Fixed in:4.4.0-42.62USN-3099-1
linux-image-4.4.0-42-generic-lpaeUbuntu
Fixed in:4.4.0-42.62~14.04.1USN-3099-2
Fixed in:4.4.0-42.62USN-3099-1
linux-image-4.4.0-42-lowlatencyUbuntu
Fixed in:4.4.0-42.62~14.04.1USN-3099-2
Fixed in:4.4.0-42.62USN-3099-1
linux-image-4.4.0-42-powerpc-e500mcUbuntu
Fixed in:4.4.0-42.62~14.04.1USN-3099-2
Fixed in:4.4.0-42.62USN-3099-1
linux-image-4.4.0-42-powerpc-smpUbuntu
Fixed in:4.4.0-42.62~14.04.1USN-3099-2
Fixed in:4.4.0-42.62USN-3099-1
linux-image-4.4.0-42-powerpc64-embUbuntu
Fixed in:4.4.0-42.62~14.04.1USN-3099-2
Fixed in:4.4.0-42.62USN-3099-1
linux-image-4.4.0-42-powerpc64-smpUbuntu
Fixed in:4.4.0-42.62~14.04.1USN-3099-2
Fixed in:4.4.0-42.62USN-3099-1
linux-lts-xenialUbuntu
Fixed in:4.4.0-42.62~14.04.1USN-3099-2
linux-raspi2Ubuntu
Fixed in:4.4.0-1027.33USN-3099-3
linux-snapdragonUbuntu
Fixed in:4.4.0-1030.33USN-3099-4

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorLocal
Attack ComplexityLow
Privileges RequiredLow
User InteractionNone
ScopeUnchanged

Impact

ConfidentialityNone
IntegrityNone
AvailabilityHigh

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

Exploit Intelligence

1.18%probability of exploitation in 30 days
64thpercentile

Moderate risk: more likely to be exploited than 64% of all known CVEs.

References

Exploit1
Third-Party Advisory2

Related Vulnerabilities

Other CWE-416 (Use After Free) vulnerabilities, ordered by exploit likelihood. View all

CVESeverityCVSSEPSSExploitedFix
CVE-2019-0708Critical9.8100%KEV + Ransom-
CVE-2021-31166Critical9.8100%KEVFix
CVE-2015-5119Critical9.899%KEV-
CVE-2010-3962High8.197%KEV-
CVE-2015-0313Critical9.896%KEVFix
CVE-2017-9798High7.595%-Fix
Embed a live status badge for CVE-2016-6828
CVE-2016-6828 severity badge

Markdown

[![CVE-2016-6828](https://tridentstack.com/cve/badge/CVE-2016-6828.svg)](https://tridentstack.com/cve/CVE-2016-6828)

HTML

<a href="https://tridentstack.com/cve/CVE-2016-6828"><img src="https://tridentstack.com/cve/badge/CVE-2016-6828.svg" alt="CVE-2016-6828"></a>

Find and fix vulnerabilities across your fleet

TridentStack Control continuously scans your Windows, macOS, and Linux fleet for known vulnerabilities, prioritizes them by severity and active exploitation, and patches them automatically.

Start free

This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-05-06.