Moderate Vulnerability in glibc Package: Integer Overflow and Information Disclosure
Summary
ALSA-2026:1334: Moderate: glibc security update. Affects glibc versions < 2.39-58.el10_1.7.alma.1. Fixed in 2.39-58.el10_1.7.alma.1. How to fix ↓
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Background
The glibc (GNU C Library) package is a core component of the Linux operating system that provides essential libraries for C programming, including standard C libraries, POSIX thread libraries, and standard math libraries. It is crucial for the functioning of various applications and system processes. The glibc package is widely used across different Linux distributions, making its security paramount for system integrity and application reliability.
Vulnerability Detail
The glibc package has been identified with two significant vulnerabilities: an integer overflow in the memalign function leading to heap corruption (CVE-2026-0861) and an information disclosure vulnerability via a zero-valued network query (CVE-2026-0915). These vulnerabilities can allow attackers to exploit the system, potentially leading to unauthorized access to sensitive information or system instability. The integer overflow can cause memory corruption, while the information disclosure can leak sensitive data over the network.
How To Fix
Minimum fixed version
2.39-58.el10_1.7.alma.1
This is the first release that contains the fix.
sudo dnf update glibcTip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
As a temporary measure, users can limit the exposure of their systems by restricting network access or disabling unnecessary services that rely on the vulnerable glibc functions until the update is applied.
Conclusion
The glibc vulnerabilities present a moderate risk to systems relying on this core library. It is crucial to apply the necessary updates to mitigate potential threats. Users should remain vigilant and utilize tools like Vulert for ongoing monitoring of vulnerabilities.
See every vulnerability recorded for glibc →
FAQ
glibc, or GNU C Library, is the standard C library for the GNU operating system and provides essential functionalities for C programs.
The vulnerabilities can lead to memory corruption and unauthorized information disclosure, potentially compromising system security.
You can use the Vulert playground at Vulert Scanner to check if your application is affected by this vulnerability without needing to sign up.
If immediate updates are not possible, consider implementing network restrictions or disabling services that utilize the vulnerable functions.
Yes, Vulert can monitor and alert you in real-time for open-source vulnerabilities in your software using just a manifest file like package-lock.json.
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