CVE-2024-50112

Estado: ModificadaAlta (7.8)—

In the Linux kernel, the following vulnerability has been resolved:

x86/lam: Disable ADDRESS_MASKING in most cases

Linear Address Masking (LAM) has a weakness related to transient execution as described in the SLAM paper[1]. Unless Linear Address Space Separation (LASS) is enabled this weakness may be exploitable.

Until kernel adds support for LASS[2], only allow LAM for COMPILE_TEST, or when speculation mitigations have been disabled at compile time, otherwise keep LAM disabled.

There are no processors in market that support LAM yet, so currently nobody is affected by this issue.

[1] SLAM: https://download.vusec.net/papers/slam_sp24.pdf [2] LASS: https://lore.kernel.org/lkml/20230609183632.48706-1-alexander.shishkin@linux.intel.com/

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[ dhansen: update SPECULATION_MITIGATIONS -> CPU_MITIGATIONS ]

CVSS

Versión: 3.1
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Puntuación base: 7.8

Probabilidad de explotación (EPSS)

Probabilidad de explotación en los próximos 30 días: 0.28%
Percentil entre todas las CVEs puntuadas: 18
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.

ExplotaciónT1068 Exploitation for Privilege Escalationprivilege escalation85 %
Impacto principalT1059 Command and Scripting Interpreterexecution75 %
Impacto secundarioT1055 Process Injectionstealth · privilege escalation70 %

Vulnerabilidad local en kernel Linux (AV:L, PR:L) sin interacción del usuario. La debilidad en LAM sin LASS permite escalada de privilegios mediante ejecución transiente. Afecta confidencialidad, integridad y disponibilidad (C:H, I:H, A:H).

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

Privileged Account Management Execution Prevention Behavior Prevention on Endpoint Threat Intelligence Program Restrict Web-Based Content Limit Software Installation

Tecnologías afectadas (1)

Linux — Linux Kernel

CWE

NVD-CWE-noinfo

Referencias

JSON original (NVD)

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      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nx86/lam: Disable ADDRESS_MASKING in most cases\n\nLinear Address Masking (LAM) has a weakness related to transient\nexecution as described in the SLAM paper[1]. Unless Linear Address\nSpace Separation (LASS) is enabled this weakness may be exploitable.\n\nUntil kernel adds support for LASS[2], only allow LAM for COMPILE_TEST,\nor when speculation mitigations have been disabled at compile time,\notherwise keep LAM disabled.\n\nThere are no processors in market that support LAM yet, so currently\nnobody is affected by this issue.\n\n[1] SLAM: https://download.vusec.net/papers/slam_sp24.pdf\n[2] LASS: https://lore.kernel.org/lkml/20230609183632.48706-1-alexander.shishkin@linux.intel.com/\n\n[ dhansen: update SPECULATION_MITIGATIONS -> CPU_MITIGATIONS ]"
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      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: x86/lam: Deshabilitar ADDRESS_MASKING en la mayoría de los casos. El enmascaramiento de direcciones lineales (LAM) tiene una debilidad relacionada con la ejecución transitoria como se describe en el documento SLAM[1]. A menos que se habilite la separación del espacio de direcciones lineales (LASS), esta debilidad puede ser explotable. Hasta que el kernel agregue soporte para LASS[2], solo permita LAM para COMPILE_TEST, o cuando las mitigaciones de especulación se hayan deshabilitado en el momento de la compilación, de lo contrario, mantenga LAM deshabilitado. No hay procesadores en el mercado que admitan LAM todavía, por lo que actualmente nadie se ve afectado por este problema. [1] SLAM: https://download.vusec.net/papers/slam_sp24.pdf [2] LASS: https://lore.kernel.org/lkml/20230609183632.48706-1-alexander.shishkin@linux.intel.com/ [ dhansen: actualización MITIGACIONES_DE_ESPECULACIÓN -&gt; MITIGACIONES_DE_CPU ]"
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