Vulnerabilities
Misconfiguration
Compliance
CVE Vulnerabilities

CVE-2016-6828

Use After Free

Published: Oct 16, 2016 | Modified: Apr 12, 2025
CVSS 3.x
5.5
MEDIUM
Source:
NVD
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CVSS 2.x
4.9 MEDIUM
AV:L/AC:L/Au:N/C:N/I:N/A:C
RedHat/V2
3.6 MODERATE
AV:L/AC:L/Au:N/C:N/I:P/A:P
RedHat/V3
4.4 MODERATE
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L
Ubuntu
MEDIUM
Vulnerability-free packages from our partners
root.io logo minimus.io logo echo.ai logo
Additional information
NVDhttps://nvd.nist.gov/vuln/detail/CVE-2016-6828
CWEhttps://cwe.mitre.org/data/definitions/416.html

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.

Weakness

The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory “belongs” to the code that operates on the new pointer.

Affected Software

NameVendorStart VersionEnd Version
Linux_kernelLinux*4.7.4 (including)
Red Hat Enterprise Linux 6RedHatkernel-0:2.6.32-642.13.1.el6*
Red Hat Enterprise Linux 7RedHatkernel-rt-0:3.10.0-514.6.1.rt56.429.el7*
Red Hat Enterprise Linux 7RedHatkernel-0:3.10.0-514.6.1.el7*
Red Hat Enterprise MRG 2RedHatkernel-rt-1:3.10.0-514.rt56.210.el6rt*
LinuxUbuntuesm-infra-legacy/trusty*
LinuxUbuntuesm-infra/xenial*
LinuxUbuntuprecise*
LinuxUbuntuprecise/esm*
LinuxUbuntutrusty*
LinuxUbuntutrusty/esm*
LinuxUbuntuupstream*
LinuxUbuntuvivid/ubuntu-core*
LinuxUbuntuxenial*
Linux-armadaxpUbuntuprecise*
Linux-armadaxpUbuntuupstream*
Linux-awsUbuntuupstream*
Linux-floUbuntutrusty*
Linux-floUbuntuupstream*
Linux-floUbuntuvivid/stable-phone-overlay*
Linux-floUbuntuxenial*
Linux-floUbuntuyakkety*
Linux-gkeUbuntuupstream*
Linux-goldfishUbuntutrusty*
Linux-goldfishUbuntuupstream*
Linux-goldfishUbuntuxenial*
Linux-goldfishUbuntuyakkety*
Linux-goldfishUbuntuzesty*
Linux-grouperUbuntutrusty*
Linux-grouperUbuntuupstream*
Linux-hweUbuntuupstream*
Linux-hwe-edgeUbuntuupstream*
Linux-linaro-omapUbuntuprecise*
Linux-linaro-omapUbuntuupstream*
Linux-linaro-sharedUbuntuprecise*
Linux-linaro-sharedUbuntuupstream*
Linux-linaro-vexpressUbuntuprecise*
Linux-linaro-vexpressUbuntuupstream*
Linux-lts-quantalUbuntuprecise*
Linux-lts-quantalUbuntuprecise/esm*
Linux-lts-quantalUbuntuupstream*
Linux-lts-raringUbuntuprecise*
Linux-lts-raringUbuntuprecise/esm*
Linux-lts-raringUbuntuupstream*
Linux-lts-saucyUbuntuprecise*
Linux-lts-saucyUbuntuprecise/esm*
Linux-lts-saucyUbuntuupstream*
Linux-lts-trustyUbuntuprecise*
Linux-lts-trustyUbuntuprecise/esm*
Linux-lts-trustyUbuntuupstream*
Linux-lts-utopicUbuntutrusty*
Linux-lts-utopicUbuntuupstream*
Linux-lts-vividUbuntutrusty*
Linux-lts-vividUbuntuupstream*
Linux-lts-wilyUbuntutrusty*
Linux-lts-wilyUbuntuupstream*
Linux-lts-xenialUbuntuesm-infra-legacy/trusty*
Linux-lts-xenialUbuntutrusty*
Linux-lts-xenialUbuntutrusty/esm*
Linux-lts-xenialUbuntuupstream*
Linux-maguroUbuntutrusty*
Linux-maguroUbuntuupstream*
Linux-makoUbuntutrusty*
Linux-makoUbuntuupstream*
Linux-makoUbuntuvivid/stable-phone-overlay*
Linux-makoUbuntuxenial*
Linux-makoUbuntuyakkety*
Linux-mantaUbuntutrusty*
Linux-mantaUbuntuupstream*
Linux-qcm-msmUbuntuprecise*
Linux-qcm-msmUbuntuupstream*
Linux-raspi2Ubuntuupstream*
Linux-raspi2Ubuntuvivid/ubuntu-core*
Linux-raspi2Ubuntuxenial*
Linux-snapdragonUbuntuupstream*
Linux-snapdragonUbuntuxenial*
Linux-ti-omap4Ubuntuprecise*
Linux-ti-omap4Ubuntuupstream*

Potential Mitigations

References

Aqua Security is the largest pure-play cloud native security company, providing customers the freedom to innovate and run their businesses with minimal friction. The Aqua Cloud Native Security Platform provides prevention, detection, and response automation across the entire application lifecycle to secure the build, secure cloud infrastructure and secure running workloads wherever they are deployed.
Copyright © 2026 Aqua Security Software Ltd.   Privacy Policy | Terms of Use