Moderate Vulnerability in Node.js: Use-After-Free Issue in c-ares
Summary
ALSA-2025:4461: Moderate: nodejs:20 security update. Affects nodejs versions < 1:20.19.1-1.module_el8.10.0+3987+dbda4426. Fixed in 1:20.19.1-1.module_el8.10.0+3987+dbda4426. How to fix ↓
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Background
Node.js is a powerful software development platform designed for building fast and scalable network applications using JavaScript. It is widely used for server-side development and has a rich ecosystem of libraries and frameworks. The platform's performance and efficiency make it a popular choice among developers. However, like any software, Node.js can be susceptible to vulnerabilities that may compromise its security and functionality.
Vulnerability Detail
The vulnerability identified in this report is a use-after-free issue in the c-ares library, specifically in the read_answers() function. This flaw can lead to potential memory corruption, which may allow an attacker to execute arbitrary code or crash the application. The vulnerability is tracked under CVE-2025-31498 and poses a moderate risk to applications utilizing affected versions of Node.js and its related packages.
How To Fix
Minimum fixed version
1:20.19.1-1.module_el8.10.0+3987+dbda4426
This is the first release that contains the fix.
sudo dnf update nodejsTip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
If immediate patching is not feasible, consider implementing the following workaround: limit the use of the c-ares library in your application until the update can be applied. Monitor your application for any unusual behavior that may indicate exploitation of this vulnerability.
Conclusion
In summary, the identified vulnerability in Node.js poses a moderate risk due to a use-after-free issue in the c-ares library. It is crucial to update affected packages to their patched versions to mitigate potential security risks. Users are encouraged to utilize tools like Vulert to monitor their applications for vulnerabilities.
See every vulnerability recorded for nodejs →
FAQ
CVE-2025-31498 is a security vulnerability in the c-ares library used by Node.js, which involves a use-after-free issue in the read_answers() function.
This vulnerability can lead to memory corruption, potentially allowing attackers to execute arbitrary code or crash your application.
Versions prior to 1:20.19.1-1.module_el8.10.0+3987+dbda4426 are affected by this vulnerability.
You can use Vulert, which monitors and alerts for open-source vulnerabilities in your software. Check your application against the vulnerability using the Vulert playground at Vulert Scanner.
Yes, you can limit the use of the c-ares library in your application and monitor for any unusual behavior until the update is applied.
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