PT-2026-26671 · Gnu+2 · Gnu C Library+2

CVE-2026-4438

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Publicado

2026-01-01

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Atualizado

2026-07-29

CVSS v3.1

7.5

Alta

VetorAV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Name of the Vulnerable Software and Affected Versions GNU C library versions 2.34 through 2.43
Description The GNU C library’s gethostbyaddr and gethostbyaddr r functions, when used with a configured nsswitch.conf file specifying the library’s DNS backend, may return invalid DNS hostnames. This behavior violates the DNS specification.
Recommendations Update the GNU C library to a version later than 2.43.

Exploit

Correção

RCE

Argument Injection

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Enumeração de Fraquezas

Identificadores relacionados

ALSA-2026:19061
ALSA-2026:20597
AZL-80282
CVE-2026-4438
ECHO-49D5-1F6E-5068
OESA-2026-1802
OESA-2026-1803
OESA-2026-1804
OESA-2026-1805
OPENSUSE-SU-2026:10662-1
OPENSUSE-SU-2026:20501-1
RHSA-2026:19061
RHSA-2026:20597
RHSA-2026:7316
SUSE-SU-2026:1369-1
SUSE-SU-2026:20999-1
SUSE-SU-2026:21019-1
SUSE-SU-2026:21039-1
SUSE-SU-2026:21069-1
SUSE-SU-2026:21164-1
USN-8611-1

Produtos afetados

Gnu C Library
Rocky Linux
Ubuntu