SB2026040349 - openEuler 24.03 LTS update for glibc

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Main Vulnerability Database SB2026040349

SB2026040349 - openEuler 24.03 LTS update for glibc

Published: April 3, 2026

Security Bulletin ID SB2026040349
Severity
Medium
Patch available
YES
Number of vulnerabilities 2
Exploitation vector Remote access
Highest impact Denial of service

Breakdown by Severity

Medium 50% Low 50%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 2 secuirty vulnerabilities.


1) Out-of-bounds read (CVE-ID: CVE-2026-4437)

The vulnerability allows a remote attacker to perform a spoofing attack.

The vulnerability exists due to a boundary condition when calling gethostbyaddr or gethostbyaddr_r with a configured nsswitch.conf that specifies the library's DNS backend in the GNU C Library version. A remote attacker can send a specially crafted response from the configured DNS server and perform a spoofing attack.


2) Input validation error (CVE-ID: CVE-2026-4438)

The vulnerability allows a remote attacker to perform a spoofing attack.

The vulnerability exists due to insufficient validation when calling gethostbyaddr or gethostbyaddr_r with a configured nsswitch.conf that specifies the library's DNS backend in the GNU C library. A remote attacker can force the library to violate the DNS specification and retrieve an invalid DNS hostname to the caller, leading to a potential spoofing attack.


Remediation

Install update from vendor's website.

References