Critical Security Advisory: cifs-utils Vulnerability in Red Hat Enterprise Linux 8

cifs-utils Updated 18 Jul 2026

Summary

15/07/2026

Disclosed on

N/A

Severity

Yes i

Fix available

High

Severity

7.8

CVSS Score

RHSA-2026:39575: Red Hat Security Advisory: cifs-utils security, bug fix, and enhancement update. Affects cifs-utils versions < 0:7.0-5.el8_10. Fixed in 0:7.0-5.el8_10. How to fix ↓

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Background

cifs-utils is a package that provides tools for mounting and managing CIFS (Common Internet File System) shares on Linux systems. It is essential for enabling file sharing between Linux and Windows systems. The package includes utilities for managing credentials and accessing remote file systems securely. However, vulnerabilities in cifs-utils can expose systems to security risks, potentially leading to unauthorized access or data breaches.

Vulnerability Detail

The vulnerability identified as CVE-2026-12505 affects the cifs-utils package, which could allow an attacker to exploit weaknesses in the handling of CIFS shares. This could lead to unauthorized access to sensitive data or the ability to manipulate shared resources. The vulnerability has a CVSS score of 7.8, indicating a high severity level, and it is crucial for users to address it promptly to mitigate potential risks.

How To Fix

Minimum fixed version

0:7.0-5.el8_10

This is the first release that contains the fix.

sudo dnf update cifs-utils

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Workaround

If immediate patching is not possible, consider restricting access to CIFS shares and monitoring for unusual activity. Additionally, disabling CIFS shares temporarily until the patch is applied can help mitigate risks.

Conclusion

The cifs-utils vulnerability (CVE-2026-12505) poses a significant risk to systems running Red Hat Enterprise Linux 8. Users are strongly advised to update their packages to the patched version 0:7.0-5.el8_10 to mitigate potential security threats. Utilizing tools like Vulert can help in monitoring and managing vulnerabilities effectively.

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