Critical Security Update for Capstone: Memory Corruption and Buffer Overflow Vulnerabilities
Summary
ALSA-2026:6817: Important: capstone security update. Affects capstone versions < 5.0.1-7.el10_1. Fixed in 5.0.1-7.el10_1. How to fix ↓
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Background
Capstone is a widely-used disassembly framework designed for binary analysis and reverse engineering within the security community. It provides a powerful API for developers to analyze machine code and is integral in various security tools. However, recent vulnerabilities have been identified that could compromise its integrity and security.
Vulnerability Detail
The vulnerabilities in Capstone stem from unchecked return values in the vsnprintf function, leading to potential memory corruption (CVE-2025-68114). Additionally, a heap buffer overflow via the skipdata callback can result in denial of service or arbitrary code execution (CVE-2025-67873). These vulnerabilities can be exploited by attackers to manipulate the execution flow of applications utilizing Capstone, posing significant risks to system security.
How To Fix
Minimum fixed version
5.0.1-7.el10_1
This is the first release that contains the fix.
sudo dnf update capstoneTip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
As a temporary measure, users can avoid using the affected features of Capstone until the update is applied. However, it is highly recommended to implement the patch as soon as possible to ensure full protection against the identified vulnerabilities.
Conclusion
The identified vulnerabilities in Capstone pose significant risks to applications utilizing this framework. It is crucial to update to the patched version to ensure security and prevent potential exploitation. Users are encouraged to monitor their applications for vulnerabilities using tools like Vulert.
See every vulnerability recorded for capstone →
FAQ
Capstone is a disassembly framework that allows developers to analyze binary code, making it a vital tool for reverse engineering and security analysis.
The main vulnerabilities include memory corruption due to unchecked vsnprintf return values and a heap buffer overflow that can lead to denial of service or arbitrary code execution.
You can use Vulert, which monitors open-source vulnerabilities in your software using a manifest file like package-lock.json. Visit Vulert Scanner to check your application without needing to sign up.
If an immediate update is not possible, refrain from using the affected features of Capstone until the update can be applied.
For detailed information, refer to the CVE pages linked in the advisory, which provide insights into the vulnerabilities and their impacts.
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