CVE-2026-3184
Full vulnerability record from the local CVENow database.
Description
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.
Severity
MEDIUM
CVSS score
5.3
(v3.1)
Vulnerability status
Analyzed
Source identifier
Published
2026-04-03 19:17:23.377000
Last modified
2026-11-06 19:17:49.787000
View original CVE JSON
{
"id": "CVE-2026-3184",
"sourceIdentifier": "[email protected]",
"published": "2026-04-03T19:17:23.377",
"lastModified": "2026-11-06T19:17:49.787",
"vulnStatus": "Analyzed",
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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."
}
],
"affected": [
{
"source": "[email protected]",
"affectedData": [
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"vendor": "Red Hat",
"product": "Red Hat Hardened Images",
"defaultStatus": "affected",
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"availabilityImpact": "NONE"
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{
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"type": "Primary",
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"weaknesses": [
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"source": "[email protected]",
"type": "Secondary",
"description": [
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"references": [
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"source": "[email protected]",
"tags": [
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}