Fix regression when mounting shares with prefix paths in cifs

Kernel Updated 02 Oct 2025

Summary

31/05/2021

Disclosed on

N/A

Severity

No i

Fix available

Unrated

Severity

Not published

CVSS Score

GSD-2021-1000075: cifs: fix regression when mounting shares with prefix paths. Affects Kernel versions >= 0049109550011245df45d4a2abf60960f3eac6af, < ee3b051cd948f3cc3e049f3b5049c3b0b7fc4b88. No fix is published. How to fix ↓

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Background

The cifs package is a component of the Linux Kernel that provides support for mounting and accessing Windows file shares using the Common Internet File System (CIFS) protocol. It allows Linux systems to interact with Windows file servers and access shared files and directories. However, a regression was introduced in version v5.12.3 of the Linux Kernel, which caused issues when mounting shares with prefix paths.

Vulnerability Detail

The regression introduced in the Linux Kernel version v5.12.3 affects the cifs package and causes problems when mounting shares with prefix paths. This vulnerability can lead to incorrect mounting of shares and potential access issues. The issue was fixed in version v5.12.3 by commit ee3b051cd948f3cc3e049f3b5049c3b0b7fc4b88, which addressed the problem introduced by commit 0049109550011245df45d4a2abf60960f3eac6af. It is important to note that the actual impact and attack plausibility of this vulnerability have not been proven yet.

How To Fix

No fixed version is published for this vulnerability.

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Workaround

There is no specific workaround mentioned for this vulnerability.

Conclusion

The cifs package in the Linux Kernel version v5.12.3 introduced a regression that caused issues when mounting shares with prefix paths. This vulnerability has been fixed in version v5.12.3 by commit ee3b051cd948f3cc3e049f3b5049c3b0b7fc4b88. It is recommended to update the Linux Kernel to the fixed version to mitigate the vulnerability. For further support on vulnerability remediation, please contact DevNack.com.

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