CVE-2025-6019
Estado: AplazadaAlta (7)—
A Local Privilege Escalation (LPE) vulnerability was found in libblockdev. Generally, the "allow_active" setting in Polkit permits a physically present user to take certain actions based on the session type. Due to the way libblockdev interacts with the udisks daemon, an "allow_active" user on a system may be able escalate to full root privileges on the target host. Normally, udisks mounts user-provided filesystem images with security flags like nosuid and nodev to prevent privilege escalation.
Leer descripción completaMostrar menos
However, a local attacker can create a specially crafted XFS image containing a SUID-root shell, then trick udisks into resizing it. This mounts their malicious filesystem with root privileges, allowing them to execute their SUID-root shell and gain complete control of the system.
CVSS
- Versión: 3.1
- Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
- Puntuación base: 7
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.47%
- Percentil entre todas las CVEs puntuadas: 38
- Fecha de la puntuación: 6/10/2026
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).
🎯 Técnicas ATT&CK
Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.
- Explotación
T1068Exploitation for Privilege Escalationprivilege escalation95 %
AV:L + PR:L sin UI sin interacción: escalada local clásica. Ataque a Polkit para ejecutar SUID-root tras montar filesystem malicioso; acceso a root/privileges completos.
Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.
🛡️ Mitigaciones ATT&CK que cubren estas técnicas
Tecnologías afectadas (2)
⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.
CWE
- CWE-250
Referencias
- https://access.redhat.com/errata/RHSA-2025:10796
- https://access.redhat.com/errata/RHSA-2025:9320
- https://access.redhat.com/errata/RHSA-2025:9321
- https://access.redhat.com/errata/RHSA-2025:9322
- https://access.redhat.com/errata/RHSA-2025:9323
- https://access.redhat.com/errata/RHSA-2025:9324
- https://access.redhat.com/errata/RHSA-2025:9325
- https://access.redhat.com/errata/RHSA-2025:9326
- https://access.redhat.com/errata/RHSA-2025:9327
- https://access.redhat.com/errata/RHSA-2025:9328
- https://access.redhat.com/errata/RHSA-2025:9878
- https://access.redhat.com/security/cve/CVE-2025-6019
- https://bugzilla.redhat.com/show_bug.cgi?id=2370051
- https://cdn2.qualys.com/2025/06/17/suse15-pam-udisks-lpe.txt
- http://www.openwall.com/lists/oss-security/2025/06/17/5
- http://www.openwall.com/lists/oss-security/2025/06/17/6
- http://www.openwall.com/lists/oss-security/2025/06/18/1
- https://lists.debian.org/debian-lts-announce/2025/06/msg00018.html
- https://news.ycombinator.com/item?id=44325861
- https://www.bleepingcomputer.com/news/linux/new-linux-udisks-flaw-lets-attackers-get-root-on-major-linux-distros/
JSON original (NVD)
Mostrar
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"descriptions": [
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"lang": "en",
"value": "A Local Privilege Escalation (LPE) vulnerability was found in libblockdev. Generally, the \"allow_active\" setting in Polkit permits a physically present user to take certain actions based on the session type. Due to the way libblockdev interacts with the udisks daemon, an \"allow_active\" user on a system may be able escalate to full root privileges on the target host. Normally, udisks mounts user-provided filesystem images with security flags like nosuid and nodev to prevent privilege escalation. However, a local attacker can create a specially crafted XFS image containing a SUID-root shell, then trick udisks into resizing it. This mounts their malicious filesystem with root privileges, allowing them to execute their SUID-root shell and gain complete control of the system."
},
{
"lang": "es",
"value": "Se encontró una vulnerabilidad de Escalada de Privilegios Locales (LPE) en libblockdev. Generalmente, la configuración \"allow_active\" de Polkit permite a un usuario físicamente presente realizar ciertas acciones según el tipo de sesión. Debido a la forma en que libblockdev interactúa con el daemon udisks, un usuario \"allow_active\" en un sistema puede escalar a privilegios de root completos en el host objetivo. Normalmente, udisks monta imágenes del sistema de archivos proporcionadas por el usuario con indicadores de seguridad como nosuid y nodev para evitar la escalada de privilegios. Sin embargo, un atacante local puede crear una imagen XFS especialmente manipulada que contenga un shell SUID-root y luego engañar a udisks para que la redimensione. Esto monta su sistema de archivos malicioso con privilegios de root, lo que le permite ejecutar su shell SUID-root y obtener el control total del sistema."
}
],
"lastModified": "2026-06-30T11:16:26.510",
"sourceIdentifier": "secalert@redhat.com"
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