Moderate Vulnerability in glib2 Package: Heap-Based Buffer Overflow
Summary
ALSA-2026:64799: Moderate: glib2 security update. Affects glib2 versions < 2.80.4-12.el10_2.22. Fixed in 2.80.4-12.el10_2.22. How to fix ↓
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Background
GLib is a fundamental library that provides core application building blocks for C libraries and applications. It is widely used in the GNOME desktop environment, offering essential functionalities such as the object system, main loop implementation, and various utility functions for string manipulation and data structures. The glib2 package is crucial for developers working with GNOME and other applications that rely on its features.
Vulnerability Detail
The vulnerability identified as CVE-2026-16118 is a heap-based buffer overflow found in the function _xdg_mime_magic_parse_magic_line() within the xdgmimemagic.c file of the glib2 package. This flaw can potentially allow an attacker to execute arbitrary code, leading to system compromise. The vulnerability arises from improper handling of input data, which can overflow the allocated memory buffer, causing unpredictable behavior and security risks.
How To Fix
Minimum fixed version
2.80.4-12.el10_2.22
This is the first release that contains the fix.
sudo dnf update glib2Tip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
As a temporary workaround, users can avoid using the affected function until the package is updated. Additionally, restricting access to applications that utilize glib2 may help mitigate the risk until a patch is applied.
Conclusion
The glib2 package has a moderate vulnerability (CVE-2026-16118) that poses significant risks due to a heap-based buffer overflow. It is essential to update to the patched version to mitigate these risks. Users should also consider using tools like Vulert to monitor their applications for vulnerabilities.
See every vulnerability recorded for glib2 →
FAQ
CVE-2026-16118 is a security vulnerability in the glib2 package that allows for a heap-based buffer overflow, potentially leading to arbitrary code execution.
You can use the Vulert platform to monitor and alert for open-source vulnerabilities in your software by simply uploading your manifest file, such as package-lock.json.
If exploited, this vulnerability can lead to unauthorized access, data breaches, and system compromise, making it critical to address promptly.
Yes, a patch is available in the form of an updated version of the glib2 package, specifically version 2.80.4-12.el10_2.22.
If immediate updates are not possible, consider implementing workarounds such as restricting access to affected applications and avoiding the use of the vulnerable function.
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