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Use After Free Affecting kernel-rt-debug package, versions <0:3.10.0-514.6.1.rt56.429.el7

Severity

 Recommended
high

Based on CentOS security rating.

Threat Intelligence

Exploit Maturity
Mature
EPSS
0.05% (18th percentile)

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  • Snyk IDSNYK-CENTOS7-KERNELRTDEBUG-2075534
  • published26 Jul 2021
  • disclosed15 Aug 2016
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Introduced: 15 Aug 2016

CVE-2016-6828  (opens in a new tab)
CWE-416  (opens in a new tab)
First added by Snyk

How to fix?

Upgrade Centos:7 kernel-rt-debug to version 0:3.10.0-514.6.1.rt56.429.el7 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-rt-debug package and not the kernel-rt-debug package as distributed by Centos. See How to fix? for Centos:7 relevant fixed versions and status.

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.

References