NULL Pointer Dereference Affecting kernel package, versions <0:4.14.318-240.529.amzn2


Severity

Recommended
high

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
0.2% (10th percentile)

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  • Snyk IDSNYK-AMZN2-KERNEL-14876428
  • published6 Jan 2026
  • disclosed9 Dec 2025

Introduced: 9 Dec 2025

CVE-2023-53786  (opens in a new tab)
CWE-476  (opens in a new tab)

How to fix?

Upgrade Amazon-Linux:2 kernel to version 0:4.14.318-240.529.amzn2 or higher.
This issue was patched in ALAS2-2023-2100.

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.

In the Linux kernel, the following vulnerability has been resolved:

dm flakey: fix a crash with invalid table line

This command will crash with NULL pointer dereference: dmsetup create flakey --table
"0 blockdev --getsize /dev/ram0 flakey /dev/ram0 0 0 1 2 corrupt_bio_byte 512"

Fix the crash by checking if arg_name is non-NULL before comparing it.

CVSS Base Scores

version 3.1