Moderate Vulnerability in Corosync: Stack Buffer Overflow Risk
Summary
ALSA-2025:7201: Moderate: corosync security update. Affects corosync-vqsim versions < 3.1.9-2.el9_6. Fixed in 3.1.9-2.el9_6. How to fix ↓
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Background
Corosync is a robust cluster engine that provides high availability and scalability for distributed applications. It offers a set of APIs for communication between nodes in a cluster, ensuring data consistency and fault tolerance. The corosync packages are essential for AlmaLinux cluster software, enabling seamless operations in multi-node environments. However, recent security assessments have revealed a critical vulnerability that could compromise the integrity of the system.
Vulnerability Detail
The vulnerability identified as CVE-2025-30472 is a stack buffer overflow originating from the 'orf_token_endian_convert' function within the Corosync codebase. This flaw allows an attacker to exploit the buffer overflow, potentially leading to arbitrary code execution or a denial of service. The implications of this vulnerability are significant, as it could allow unauthorized access to sensitive data or disrupt cluster operations, affecting the overall reliability of the system.
How To Fix
Minimum fixed version
3.1.9-2.el9_6
This is the first release that contains the fix.
sudo dnf update corosync-vqsimTip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
As a temporary measure, users can limit access to the Corosync service or implement network-level controls to restrict unauthorized access while awaiting the patch. Additionally, monitoring logs for unusual activity can help identify potential exploitation attempts.
Conclusion
The discovery of CVE-2025-30472 in the Corosync cluster engine highlights the importance of maintaining up-to-date software to protect against vulnerabilities. Users are encouraged to apply the necessary updates promptly and consider implementing additional security measures to safeguard their systems.
See every vulnerability recorded for corosync-vqsim →
FAQ
CVE-2025-30472 is a security vulnerability in the Corosync cluster engine that allows for a stack buffer overflow, potentially leading to arbitrary code execution.
You can use Vulert's playground at Vulert Scanner to check if your application is affected by this vulnerability without needing to sign up.
The risks include unauthorized access to sensitive data, potential disruption of cluster operations, and overall compromise of system integrity.
You can update the packages using the command 'sudo dnf update corosync-vqsim corosynclib' to ensure you have the latest secure versions.
Yes, temporarily limiting access to the Corosync service and monitoring logs for unusual activity can serve as a workaround until the patch is applied.
Related vulnerabilities
Recent vulnerabilities recorded for corosync-vqsim.
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