CVE-2026-15779

Gravedad CVSS v3.1:

MEDIA

Tipo:

No Disponible / Otro tipo

Fecha de publicación:

15/07/2026

Última modificación:

15/07/2026

Descripción

*** Pendiente de traducción *** A flaw was found in samba&#39;s pam_winbind. When mkhomedir is enabled, pam_winbind chowns the target account&#39;s home directory without validating the path is not a critical system directory such as /. On affected systems, accounts with / as their home directory (a common default for system accounts) can have this triggered not only by root, but by a non-root user holding a narrow sudo delegation to run commands as that account, causing ownership of / to change and resulting in severe denial of service (SSH, sudo, and package-manager failures). The change does not grant write access to / (which ships with restrictive 0555 permissions on RHEL), so the impact is availability loss rather than further privilege escalation.

Impacto

Vector 3.x

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H CVSS v3.1 Severidad y Métricas:

Puntuación base: 6.10 MEDIA
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H

Vector de acceso (AV): Local
Complejidad de acceso (AC): Bajo
Privilegios Requeridos (PR): Bajo
Interacción del usuario (UI): Ninguno
Alcance (S): Sin modificar
Impacto a la confidencialidad (C): Ninguno
Impacto a la integridad (I): Bajo
Impacto a la disponibilidad (A): Alto

Puntuación base 3.x

6.10

Gravedad 3.x

MEDIA

CVE-2026-15779

Descripción

Impacto

Referencias a soluciones, herramientas e información