Use After Free Affecting kernel-kdump-devel package, versions <0:2.6.32-642.13.1.el6


Severity

Recommended
high

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

Exploit Maturity
Mature
EPSS
0.05% (18th percentile)

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  • Snyk IDSNYK-RHEL6-KERNELKDUMPDEVEL-1508822
  • published26 Jul 2021
  • disclosed15 Aug 2016

Introduced: 15 Aug 2016

CVE-2016-6828  (opens in a new tab)
CWE-416  (opens in a new tab)

How to fix?

Upgrade RHEL:6 kernel-kdump-devel to version 0:2.6.32-642.13.1.el6 or higher.
This issue was patched in RHSA-2017:0036.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-kdump-devel package and not the kernel-kdump-devel package as distributed by RHEL. See How to fix? for RHEL:6 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.