Incorrect Calculation of Buffer Size Affecting kernel package, versions <0:4.14.262-135.489.amzn1


Severity

Recommended
high

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
0.04% (6th percentile)

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  • Snyk IDSNYK-AMZN201803-KERNEL-2395738
  • published8 Feb 2022
  • disclosed24 Aug 2022

Introduced: 8 Feb 2022

CVE-2021-4155  (opens in a new tab)
CWE-131  (opens in a new tab)

How to fix?

Upgrade Amazon-Linux:2018.03 kernel to version 0:4.14.262-135.489.amzn1 or higher.
This issue was patched in ALAS-2022-1563.

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 data leak flaw was found in the way XFS_IOC_ALLOCSP IOCTL in the XFS filesystem allowed for size increase of files with unaligned size. A local attacker could use this flaw to leak data on the XFS filesystem otherwise not accessible to them.

CVSS Scores

version 3.1