Use After Free Affecting kernel-debuginfo package, versions <0:4.14.181-108.257.amzn1


Severity

Recommended
high

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
1.54% (87th percentile)

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  • Snyk IDSNYK-AMZN201803-KERNELDEBUGINFO-1721944
  • published27 Sept 2021
  • disclosed12 Dec 2019

Introduced: 12 Dec 2019

CVE-2019-19768  (opens in a new tab)
CWE-416  (opens in a new tab)

How to fix?

Upgrade Amazon-Linux:2018.03 kernel-debuginfo to version 0:4.14.181-108.257.amzn1 or higher.
This issue was patched in ALAS-2020-1377.

NVD Description

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

In the Linux kernel 5.4.0-rc2, there is a use-after-free (read) in the __blk_add_trace function in kernel/trace/blktrace.c (which is used to fill out a blk_io_trace structure and place it in a per-cpu sub-buffer).

CVSS Scores

version 3.1