Moderate Vulnerability in apr-util: Heap Buffer Overflow and Information Disclosure
Summary
RLSA-2026:69113: Moderate: apr-util security update. Affects apr-util versions < 0:1.6.1-9.el8_10.1. Fixed in 0:1.6.1-9.el8_10.1. How to fix ↓
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Background
The Apache Portable Runtime Utility (apr-util) is a library designed to provide a set of utility interfaces for the Apache Portable Runtime (APR). It supports various functionalities including XML processing, LDAP, database interfaces, and URI parsing. This library is essential for applications that require a consistent interface across different platforms. However, recent security findings have revealed multiple vulnerabilities within this package, making it crucial for users to address these issues promptly.
Vulnerability Detail
The vulnerabilities identified in apr-util include a heap buffer overflow in the Redis client (CVE-2026-34501), which can lead to arbitrary code execution. Additionally, there is an information disclosure vulnerability via a timing attack in password validation (CVE-2025-49506), which could allow attackers to gain sensitive information. A denial of service vulnerability via XML stack recursion (CVE-2026-32327) can cause applications to crash, while another heap buffer overflow in the APR memcached client (CVE-2026-34502) poses similar risks. These vulnerabilities can severely impact the integrity and availability of applications relying on apr-util.
How To Fix
Minimum fixed version
0:1.6.1-9.el8_10.1
This is the first release that contains the fix.
sudo dnf update apr-utilTip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
As a temporary workaround, users can limit access to the affected services or implement additional security measures such as input validation and monitoring for unusual activity until the package is updated.
Conclusion
The vulnerabilities in apr-util pose significant risks to applications that rely on this library. It is essential for users to update to the latest patched version to mitigate these risks. By staying informed and proactive, users can protect their applications from potential exploits.
See every vulnerability recorded for apr-util →
FAQ
apr-util is a library that provides utility interfaces for the Apache Portable Runtime, supporting various functionalities such as XML processing and database interfaces.
The main vulnerabilities include heap buffer overflows, information disclosure via timing attacks, and denial of service via XML stack recursion.
You can use Vulert, which monitors and alerts for open-source vulnerabilities in your software. Visit Vulert Scanner to check if your application is affected without needing to sign up.
The CVSS score for these vulnerabilities is 7.5, indicating a moderate severity level.
You can update the apr-util package by running the command 'sudo yum update apr-util' in your terminal.
References
Related vulnerabilities
Recent vulnerabilities recorded for apr-util.
