Moderate Vulnerability in glibc Package: Security Update Required
Summary
ALSA-2026:80798: Moderate: glibc security update. Affects compat-libpthread-nonshared versions < 2.28-251.el8_10.48. Fixed in 2.28-251.el8_10.48. How to fix ↓
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Background
The glibc (GNU C Library) package provides essential C libraries, POSIX thread libraries, standard math libraries, and the name service cache daemon (nscd) used by various programs on Linux systems. It is crucial for system functionality and stability, making it a key component in many applications. The recent vulnerabilities identified in glibc could potentially compromise system security and performance.
Vulnerability Detail
The vulnerabilities in glibc include an out-of-bounds array write (CVE-2026-19542), a non-progress denial of service (DoS) in SHIFT_JISX0213 (CVE-2026-77117), a non-progress DoS in EUC_JISX0213 to UCS-4 conversion state (CVE-2026-80489), and a heap buffer overflow via an attacker-controlled fopen mode string (CVE-2026-18374). These vulnerabilities can lead to system crashes, unauthorized access, and exploitation by attackers, posing significant risks to system integrity and user data.
How To Fix
Minimum fixed version
2.28-251.el8_10.48
This is the first release that contains the fix.
sudo dnf update compat-libpthread-nonsharedTip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
If immediate patching is not possible, consider disabling the affected services or limiting access to the system until the update can be applied. Additionally, ensure that your system is behind a firewall and monitor for any unusual activity.
Conclusion
The glibc security vulnerabilities pose significant risks to Linux systems, necessitating immediate attention and patching. Users are advised to update their packages to the latest versions to mitigate these risks and ensure system integrity.
See every vulnerability recorded for compat-libpthread-nonshared →
FAQ
glibc, or GNU C Library, is a core component of the Linux operating system that provides essential libraries for C programming and system calls.
The vulnerabilities can lead to system crashes, unauthorized access, and exploitation by attackers, potentially compromising user data and system integrity.
You can use Vulert's playground at Vulert Scanner to check if your application is affected by this vulnerability without requiring any signup.
If you cannot update glibc immediately, consider disabling affected services, limiting system access, and monitoring for unusual activity.
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.
Related vulnerabilities
Recent vulnerabilities recorded for compat-libpthread-nonshared.
