PT-2026-26670 · Gnu+1 · Gnu C Library+1

Kevin Farrell · Publicado 2026-01-01 · Atualizado 2026-06-01 · CVE-2026-4437

Positive Technologies (AI Summary)

CVSS v3.1

7.5

Alta

Vetor base

AV: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 contains a flaw where calling the gethostbyaddr or gethostbyaddr r functions with a specific nsswitch.conf configuration utilizing the library’s DNS backend may lead to a violation of the DNS specification. A crafted response from a configured DNS server could cause the application to incorrectly interpret a non-answer section of the DNS response as a valid answer.

Recommendations Versions prior to 2.34 or after 2.43 should be used.

Correção

Out of bounds Read

Enumeração de Fraquezas

CWE-125

Identificadores relacionados

ALSA-2026:19061

CVE-2026-4437

ECHO-3C7D-5484-9E80

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-2026:21019-1

SUSE-SU-2026:21039-1

SUSE-SU-2026:21069-1

SUSE-SU-2026:21164-1

Produtos afetados

Gnu C Library

Rocky Linux

Referências · 45

• https://access.redhat.com/security/cve/CVE-2026-4437 · Nota
• https://security-tracker.debian.org/tracker/CVE-2026-4437 · Aviso do Fabricante
• https://osv.dev/vulnerability/ROOT-OS-DEBIAN-13-CVE-2026-4437 · Aviso do Fabricante
• https://bugzilla.redhat.com/2449783 · Nota
• https://suse.com/security/cve/CVE-2026-4437 · Nota
• https://bugzilla.redhat.com/2449777 · Nota
• https://osv.dev/vulnerability/SUSE-SU-2026:1369-1 · Aviso do Fabricante
• https://osv.dev/vulnerability/SUSE-SU-2026:21019-1 · Aviso do Fabricante
• https://suse.com/security/cve/CVE-2026-0861 · Nota
• https://osv.dev/vulnerability/openSUSE-SU-2026:10662-1 · Aviso do Fabricante
• https://suse.com/security/cve/CVE-2026-4438 · Nota
• https://suse.com/support/update/announcement/2026/suse-su-202621019-1 · Nota
• https://docs.bell-sw.com/security/cves/CVE-2026-4437 · Nota
• https://twitter.com/infoflowcloud/status/2035262964530393474 · Publicação no Twitter
• https://access.redhat.com/security/cve/CVE-2026-4438 · Nota