Use After Free Affecting kernel-tools-devel package, versions <0:4.4.19-29.55.amzn1


Severity

Recommended
0.0
medium
0
10

Based on Amazon Linux security rating.

Threat Intelligence

Exploit Maturity
Mature
EPSS
0.05% (18th percentile)

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  • Snyk IDSNYK-AMZN201803-KERNELTOOLSDEVEL-1701241
  • published27 Sept 2021
  • disclosed16 Oct 2016

Introduced: 16 Oct 2016

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

How to fix?

Upgrade Amazon-Linux:2018.03 kernel-tools-devel to version 0:4.4.19-29.55.amzn1 or higher.
This issue was patched in ALAS-2016-740.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-tools-devel package and not the kernel-tools-devel package as distributed by Amazon-Linux. See How to fix? for Amazon-Linux:2018.03 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.