Access of Uninitialized Pointer Affecting kernel6.18-tools-debuginfo package, versions <1:6.18.25-52.107.amzn2023


Severity

Recommended
high

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
0.36% (28th percentile)

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  • Snyk IDSNYK-AMZN2023-KERNEL618TOOLSDEBUGINFO-17288293
  • published10 Jun 2026
  • disclosed1 May 2026

Introduced: 1 May 2026

CVE-2026-43055  (opens in a new tab)
CWE-824  (opens in a new tab)

How to fix?

Upgrade Amazon-Linux:2023 kernel6.18-tools-debuginfo to version 1:6.18.25-52.107.amzn2023 or higher.
This issue was patched in ALAS2023-2026-1746.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel6.18-tools-debuginfo package and not the kernel6.18-tools-debuginfo package as distributed by Amazon-Linux. See How to fix? for Amazon-Linux:2023 relevant fixed versions and status.

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

scsi: target: file: Use kzalloc_flex for aio_cmd

The target_core_file doesn't initialize the aio_cmd->iocb for the ki_write_stream. When a write command fd_execute_rw_aio() is executed, we may get a bogus ki_write_stream value, causing unintended write failure status when checking iocb->ki_write_stream > max_write_streams in the block device.

Let's just use kzalloc_flex when allocating the aio_cmd and let ki_write_stream=0 to fix this issue.

CVSS Base Scores

version 3.1