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CVE-2026-3184

Estado: AnalizadaMedia (5.3)—

A flaw was found in util-linux. Improper hostname canonicalization in the `login(1)` utility, when invoked with the `-h` option, can modify the supplied remote hostname before setting `PAM_RHOST`. A remote attacker could exploit this by providing a specially crafted hostname, potentially bypassing host-based Pluggable Authentication Modules (PAM) access control rules that rely on fully qualified domain names. This could lead to unauthorized access.

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

Tecnologías afectadas (2)

Kernel — Util-linuxRedhat — Hardened Images

CWE

Referencias

JSON original (NVD)

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  "published": "2026-04-03T19:17:23.377",
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      "value": "A flaw was found in util-linux. Improper hostname canonicalization in the `login(1)` utility, when invoked with the `-h` option, can modify the supplied remote hostname before setting `PAM_RHOST`. A remote attacker could exploit this by providing a specially crafted hostname, potentially bypassing host-based Pluggable Authentication Modules (PAM) access control rules that rely on fully qualified domain names. This could lead to unauthorized access."
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      "value": "Se encontró una falla en util-linux. La canonicalización incorrecta del nombre de host en la utilidad 'login(1)', cuando se invoca con la opción '-h', puede modificar el nombre de host remoto proporcionado antes de establecer 'PAM_RHOST'. Un atacante remoto podría explotar esto al proporcionar un nombre de host especialmente diseñado, eludiendo potencialmente las reglas de control de acceso de Módulos de Autenticación Conectables (PAM) basadas en host que dependen de nombres de dominio completamente calificados. Esto podría conducir a acceso no autorizado."
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