Use After Free Affecting kernel package, versions <0:4.9.38-16.35.amzn1


Severity

Recommended
critical

Based on Amazon Linux security rating.

Threat Intelligence

Exploit Maturity
Mature
EPSS
0.08% (36th percentile)

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  • Snyk IDSNYK-AMZN201803-KERNEL-1707470
  • published27 Sept 2021
  • disclosed11 Jul 2017

Introduced: 11 Jul 2017

CVE-2017-11176  (opens in a new tab)
CWE-416  (opens in a new tab)

How to fix?

Upgrade Amazon-Linux:2018.03 kernel to version 0:4.9.38-16.35.amzn1 or higher.
This issue was patched in ALAS-2017-868.

NVD Description

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

The mq_notify function in the Linux kernel through 4.11.9 does not set the sock pointer to NULL upon entry into the retry logic. During a user-space close of a Netlink socket, it allows attackers to cause a denial of service (use-after-free) or possibly have unspecified other impact.

CVSS Scores

version 3.1