Critical Samba Vulnerability in Red Hat Packages: Security Update Required
Summary
RHSA-2026:28132: Red Hat Security Advisory: samba security update. Affects ctdb versions < 0:4.10.16-26.el7_9.1. Fixed in 0:4.10.16-26.el7_9.1. How to fix ↓
Check if this vulnerability affects your application
Upload a manifest or SBOM and we'll show whether you're affected, plus every other risky package in the same scan.
No signup required · Results in about 60 seconds
Background
Samba is an open-source implementation of the SMB/CIFS networking protocol, allowing for file and print services to SMB/CIFS clients. It is widely used in various operating systems, including Linux and Unix. The affected packages include ctdb, libsmbclient, samba, and others, which are integral for network file sharing and management. The recent security advisory indicates vulnerabilities that could lead to unauthorized access and data breaches.
Vulnerability Detail
The vulnerabilities identified in Samba, specifically CVE-2026-4408 and CVE-2026-4480, stem from improper handling of certain requests, which could allow an attacker to execute arbitrary code or gain unauthorized access to sensitive information. The potential ramifications include data loss, unauthorized data manipulation, and compromised system integrity. This vulnerability has a CVSS score of 9.0, indicating a critical level of severity.
How To Fix
Minimum fixed version
0:4.10.16-26.el7_9.1
This is the first release that contains the fix.
sudo dnf update ctdbTip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
As a temporary measure, users can restrict access to Samba services by configuring firewall rules to limit exposure to trusted networks only. This can be done by using the following command:
sudo firewall-cmd --zone=trusted --add-service=samba --permanent' followed by 'sudo firewall-cmd --reload'.
Conclusion
In summary, the Samba vulnerability identified in Red Hat packages poses a significant risk to system security. It is crucial to update the affected packages to the patched version to mitigate potential threats. Users should also consider implementing temporary workarounds while planning for a complete update.
See every vulnerability recorded for ctdb →
FAQ
The CVSS score of this vulnerability is 9.0, indicating a critical level of severity.
You can use the Vulert playground at Vulert Scanner to check if your application is affected by this vulnerability without requiring any signup.
Failure to update the affected packages could lead to unauthorized access, data breaches, and potential loss of sensitive information.
Yes, Vulert can monitor and alert in real-time for open-source vulnerabilities in your software using just a manifest file like package-lock.json.
If immediate updates are not possible, consider implementing firewall rules to restrict access to Samba services as a temporary workaround.
Related vulnerabilities
Recent vulnerabilities recorded for ctdb.
