Moderate Vulnerability in OpenSSL: Information Disclosure via Invalid RSA Public Key
Summary
ALSA-2026:19066: Moderate: openssl security update. Affects openssl versions < 1:3.5.5-2.el10_2.alma.1. Fixed in 1:3.5.5-2.el10_2.alma.1. How to fix ↓
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Background
OpenSSL is a widely-used toolkit that implements the Secure Sockets Layer (SSL) and Transport Layer Security (TLS) protocols, along with a robust general-purpose cryptography library. It is essential for secure communications over computer networks. The package is integral to many applications and systems, providing encryption and security features. However, vulnerabilities in OpenSSL can lead to significant security risks, including data breaches and unauthorized access.
Vulnerability Detail
The vulnerability identified as CVE-2026-31790 allows for information disclosure from uninitialized memory when an invalid RSA public key is processed. This can potentially expose sensitive information that should remain confidential, leading to security breaches. The issue arises from improper handling of memory, which can be exploited by attackers to gain access to sensitive data.
How To Fix
Minimum fixed version
1:3.5.5-2.el10_2.alma.1
This is the first release that contains the fix.
sudo dnf update opensslTip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
Currently, there are no specific workarounds mentioned for this vulnerability. The best course of action is to apply the security update as soon as it is available.
Conclusion
The OpenSSL vulnerability CVE-2026-31790 poses a moderate risk due to potential information disclosure from uninitialized memory. It is crucial for users to update their OpenSSL packages to the latest patched version to ensure their systems remain secure. Regular monitoring for vulnerabilities using tools like Vulert can further enhance security.
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FAQ
CVE-2026-31790 is a vulnerability in OpenSSL that allows for information disclosure from uninitialized memory when processing an invalid RSA public key.
This vulnerability can lead to the exposure of sensitive information, which may compromise the security of your system and data.
You should update your OpenSSL package to the patched version 1:3.5.5-2.el10_2.alma.1 or later to mitigate the risk.
As of now, there are no publicly known exploits for CVE-2026-31790, but it is crucial to apply the update to prevent potential attacks.
You can use Vulert, which monitors and alerts for open-source vulnerabilities in your software by analyzing a manifest file like package-lock.json. You can check your application for vulnerabilities using the Vulert playground without any signup.
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