CVE-2023-4911—GNU C Library Buffer Overflow Vulnerability

PUBLISHEDvulnerability record
2023-11-21 · last modified June 21, 2025

Metadata

CVE ID:
CVE-2023-4911
Project:
GNU
Product:
GNU C Library
Date Added:
2023-11-21
Due Date:
2023-12-12
Last Updated:
June 21, 2025

Vulnerability Name

GNU C Library Buffer Overflow Vulnerability

Description

GNU C Library's dynamic loader ld.so contains a buffer overflow vulnerability when processing the GLIBC_TUNABLES environment variable, allowing a local attacker to execute code with elevated privileges.

Known To Be Used in Ransomware Campaigns?

Ransomware Status:
Unknown

Action

Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

Additional Notes

  • This vulnerability affects a common open-source component, third-party library, or a protocol used by different products. Please check with specific vendors for information on patching status. For more information, please see: https://sourceware.org/git/?p=glibc.git
  • a=commitdiff
  • h=1056e5b4c3f2d90ed2b4a55f96add28da2f4c8fa, https://access.redhat.com/security/cve/cve-2023-4911, https://www.debian.org/security/2023/dsa-5514
  • https://nvd.nist.gov/vuln/detail/CVE-2023-4911

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