Out-of-bounds Read Affecting kernel package, versions <0:4.14.248-129.473.amzn1


Severity

Recommended
high

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
0.06% (26th percentile)

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  • Snyk IDSNYK-AMZN201803-KERNEL-1727887
  • published5 Oct 2021
  • disclosed16 Feb 2022

Introduced: 5 Oct 2021

CVE-2021-3753  (opens in a new tab)
CWE-125  (opens in a new tab)

How to fix?

Upgrade Amazon-Linux:2018.03 kernel to version 0:4.14.248-129.473.amzn1 or higher.
This issue was patched in ALAS-2021-1539.

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.

A race problem was seen in the vt_k_ioctl in drivers/tty/vt/vt_ioctl.c in the Linux kernel, which may cause an out of bounds read in vt as the write access to vc_mode is not protected by lock-in vt_ioctl (KDSETMDE). The highest threat from this vulnerability is to data confidentiality.

CVSS Scores

version 3.1