Critical Security Update for rsyslog: Addressing Vulnerabilities in Logging System
Summary
RHSA-2026:84576: Red Hat Security Advisory: rsyslog security update. Affects rsyslog versions < 0:8.2412.0-1.el9_6.2. Fixed in 0:8.2412.0-1.el9_6.2. How to fix ↓
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Background
Rsyslog is a high-performance logging system that provides a reliable way to manage log messages from various sources. It supports a wide range of protocols and formats, making it a versatile choice for system administrators. However, recent vulnerabilities have been identified that could potentially compromise the integrity and security of log data.
Vulnerability Detail
The vulnerabilities identified in rsyslog, specifically CVE-2026-19654 and CVE-2026-78002, originate from flaws in the handling of log messages. These vulnerabilities could allow an attacker to exploit the logging system, potentially leading to unauthorized access to sensitive information or denial of service. The technical implications include the possibility of log injection attacks and system crashes, which could severely impact system operations and security.
How To Fix
Minimum fixed version
0:8.2412.0-1.el9_6.2
This is the first release that contains the fix.
sudo dnf update rsyslogTip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
As a temporary workaround, you can restrict access to the rsyslog service by configuring firewall rules to limit connections to trusted IP addresses only. This can help mitigate the risk of exploitation until the update is applied.
Conclusion
The vulnerabilities in rsyslog pose significant risks to system security and integrity. It is crucial to apply the necessary updates to mitigate these risks and ensure the logging system operates securely. Regular monitoring and prompt updates are essential for maintaining a secure environment.
See every vulnerability recorded for rsyslog →
FAQ
The main vulnerabilities are CVE-2026-19654 and CVE-2026-78002, which could allow attackers to exploit the logging system.
You can use the Vulert playground at Vulert Scanner to check if your application is affected by this vulnerability.
The CVSS score of the vulnerability is 7.5, indicating a high severity level.
Yes, Vulert can monitor and alert in real-time for open-source vulnerabilities using just a manifest file like package-lock.json.
If an immediate update is not possible, implement firewall rules to restrict access to the rsyslog service as a temporary measure.
Related vulnerabilities
Recent vulnerabilities recorded for rsyslog.
