Race Condition Affecting samba-vfs-glusterfs package, versions <0:4.10.16-24.amzn2.0.5


Severity

Recommended
0.0
low
0
10

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
0.22% (46th percentile)

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  • Snyk IDSNYK-AMZN2-SAMBAVFSGLUSTERFS-12508379
  • published5 Sept 2025
  • disclosed11 Jan 2022

Introduced: 11 Jan 2022

CVE-2021-43566  (opens in a new tab)
CWE-362  (opens in a new tab)

How to fix?

Upgrade Amazon-Linux:2 samba-vfs-glusterfs to version 0:4.10.16-24.amzn2.0.5 or higher.
This issue was patched in ALAS2-2025-2979.

NVD Description

Note: Versions mentioned in the description apply only to the upstream samba-vfs-glusterfs package and not the samba-vfs-glusterfs package as distributed by Amazon-Linux. See How to fix? for Amazon-Linux:2 relevant fixed versions and status.

All versions of Samba prior to 4.13.16 are vulnerable to a malicious client using an SMB1 or NFS race to allow a directory to be created in an area of the server file system not exported under the share definition. Note that SMB1 has to be enabled, or the share also available via NFS in order for this attack to succeed.

CVSS Base Scores

version 3.1