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CVE-2023-4813

MediumPublished

Glibc: potential use-after-free in gaih_inet()

Published: Sep 12, 2023
Updated: Nov 11, 2025
Assigning CNA: redhat
Evidence observed: Aug 22, 2026

Primary CVSS

5.9/ 10Medium

nvd · CVSS 3.1

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS probability estimate

1.9%

Low · next 30 days

Percentile: 78.8%
Model date: Sep 21, 2026

EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.

Summary

A flaw has been identified in glibc. In an uncommon situation, the gaih_inet function may use memory that has been freed, resulting in an application crash. This issue is only exploitable when the getaddrinfo function is called and the hosts database in /etc/nsswitch.conf is configured with SUCCESS=continue or SUCCESS=merge.

Sources

cve-2023-4813PoC
Proof-of-concept exploit for CVE-2023-4813, demonstrating a specific vulnerability in a C-based application for security research and testing.

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