Use After Free Affecting kernel package, versions <0:4.14.177-139.253.amzn2


Severity

Recommended
0.0
high
0
10

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
0.71% (49th percentile)

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  • Snyk IDSNYK-AMZN2-KERNEL-1680628
  • published27 Sept 2021
  • disclosed5 May 2020

Introduced: 5 May 2020

CVE-2020-12657  (opens in a new tab)
CWE-416  (opens in a new tab)

How to fix?

Upgrade Amazon-Linux:2 kernel to version 0:4.14.177-139.253.amzn2 or higher.
This issue was patched in ALAS2-2020-1440.

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:2 relevant fixed versions and status.

An issue was discovered in the Linux kernel before 5.6.5. There is a use-after-free in block/bfq-iosched.c related to bfq_idle_slice_timer_body.

CVSS Base Scores

version 3.1