CyberICT

CVE-2026-4438

Microsoft · Published March 23, 2026

CVSS v3.1

MEDIUM
Patch availableGet patch

Description

gethostbyaddr and gethostbyaddr_r return invalid DNS hostnames. gethostbyaddr and gethostbyaddr_r return invalid DNS hostnames

Affected Products

  • azl3 glibc 2.38-19 on Azure Linux 3.0
  • cbl2 glibc 2.35-10
  • azl3 glibc 2.38-18 on Azure Linux 3.0
  • cbl2 glibc 2.35-10 on CBL Mariner 2.0

CVSS Vector

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