📦 Glibc

by Gnu

🔍 What is Glibc?

The GNU C Library (glibc) is the core C library for Linux systems, providing essential system calls and basic functions for all C programs. It is a fundamental component that nearly every Linux application depends on.

🛡️ Security Overview

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⚠️ Known Vulnerabilities

CVE-2023-25139

CRITICAL CVSS 9.8 Feb 3, 2023

CVE-2023-25139 is a buffer overflow vulnerability in glibc's sprintf function that occurs when formatting numbers with thousands separators and padding. This allows attackers to write beyond allocated...

CVE-2022-23218

CRITICAL CVSS 9.8 Jan 14, 2022

A buffer overflow vulnerability in glibc's sunrpc module allows attackers to execute arbitrary code or cause denial of service. This affects applications using the deprecated svcunix_create function o...

CVE-2021-35942

CRITICAL CVSS 9.1 Jul 22, 2021

This vulnerability in glibc's wordexp function allows attackers to cause denial of service or potentially read arbitrary memory when processing malicious input. It affects any application using glibc'...

CVE-2021-33574

CRITICAL CVSS 9.8 May 25, 2021

This CVE describes a use-after-free vulnerability in the GNU C Library (glibc) mq_notify function affecting versions 2.32 and 2.33. Attackers could exploit this to cause denial of service (application...

CVE-1999-0199

CRITICAL CVSS 9.8 Oct 6, 2020

This CVE describes a documentation issue in glibc's tdelete function where the return value behavior when deleting a tree's root was unspecified. This could lead developers to write code that accesses...

CVE-2025-15281

HIGH CVSS 7.5 Jan 20, 2026

A memory corruption vulnerability in GNU C Library's wordexp function when using WRDE_REUSE with WRDE_APPEND flags can return uninitialized memory. This may cause process crashes during subsequent wor...

CVE-2026-0915

HIGH CVSS 7.5 Jan 15, 2026

This vulnerability in GNU C Library (glibc) allows stack memory contents to be leaked to DNS resolvers when getnetbyaddr functions query for a zero-valued network with DNS backend configured. It affec...

CVE-2026-0861

HIGH CVSS 8.4 Jan 14, 2026

An integer overflow vulnerability in GNU C Library's memalign functions (memalign, posix_memalign, aligned_alloc) can lead to heap corruption when both size and alignment parameters are attacker-contr...

CVE-2025-4802

HIGH CVSS 7.8 May 16, 2025

This vulnerability in GNU C Library (glibc) versions 2.27 to 2.38 allows attackers to load malicious shared libraries via the LD_LIBRARY_PATH environment variable in statically compiled setuid binarie...

CVE-2024-33599

HIGH CVSS 8.1 May 6, 2024

A stack-based buffer overflow vulnerability in nscd (Name Service Cache Daemon) allows attackers to execute arbitrary code or crash the service when netgroup cache is exhausted. This affects systems r...

CVE-2024-33601

HIGH CVSS 7.3 May 6, 2024

A memory allocation failure in nscd's netgroup cache can cause the daemon to terminate, resulting in denial of service for clients relying on name service caching. This affects systems running glibc 2...

CVE-2023-6246

HIGH CVSS 8.4 Jan 31, 2024

A heap-based buffer overflow in glibc's syslog functions allows attackers to crash applications or potentially escalate privileges locally. This affects programs using syslog/vsyslog without proper op...

CVE-2023-4911

HIGH CVSS 7.8 Oct 3, 2023

CVE-2023-4911 is a buffer overflow vulnerability in the GNU C Library's dynamic loader (ld.so) that allows local attackers to exploit SUID binaries. By crafting malicious GLIBC_TUNABLES environment va...

CVE-2023-5156

HIGH CVSS 7.5 Sep 25, 2023

CVE-2023-5156 is a memory leak vulnerability in the GNU C Library (glibc) introduced by a previous fix for CVE-2023-4806. This flaw can cause applications to crash due to memory exhaustion, affecting ...

CVE-2025-5745

MEDIUM CVSS 5.6 Jun 5, 2025

A Power10-specific optimization bug in GNU C Library's strncmp function corrupts non-volatile vector registers, potentially altering program control flow or leaking sensitive string data. This affects...

CVE-2025-5702

MEDIUM CVSS 5.6 Jun 5, 2025

This vulnerability in GNU C Library's Power10-optimized strcmp function corrupts non-volatile vector registers, potentially altering program control flow or leaking sensitive string data. It affects s...