CVE-2025-71101

Estado: ModificadaAlta (7.1)—

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

platform/x86: hp-bioscfg: Fix out-of-bounds array access in ACPI package parsing

The hp_populate_*_elements_from_package() functions in the hp-bioscfg driver contain out-of-bounds array access vulnerabilities.

These functions parse ACPI packages into internal data structures using a for loop with index variable 'elem' that iterates through enum_obj/integer_obj/order_obj/password_obj/string_obj arrays.

When processing multi-element fields like PREREQUISITES and ENUM_POSSIBLE_VALUES, these functions read multiple consecutive array elements using expressions like 'enum_obj[elem + reqs]' and 'enum_obj[elem + pos_values]' within nested loops.

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The bug is that the bounds check only validated elem, but did not consider the additional offset when accessing elem + reqs or elem + pos_values.

The fix changes the bounds check to validate the actual accessed index.

CVSS

Versión: 3.1
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
Puntuación base: 7.1

Probabilidad de explotación (EPSS)

Probabilidad de explotación en los próximos 30 días: 0.14%
Percentil entre todas las CVEs puntuadas: 3
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 principalT1005 Data from Local Systemcollection75 %
Impacto secundarioT1499.004 Application or System Exploitationimpact70 %

Acceso local (AV:L) sin interacción (UI:N) con privilegios (PR:L) permite escalada mediante lectura out-of-bounds en kernel (CWE-125). Pueden extraerse datos sensibles o causar DoS por corrupción de memoria.

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

Threat Intelligence Program Filter Network Traffic Execution Prevention Application Isolation and Sandboxing Exploit Protection Update Software

Tecnologías afectadas (1)

Linux — Linux Kernel

CWE

CWE-125

Referencias

JSON original (NVD)

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      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nplatform/x86: hp-bioscfg: Fix out-of-bounds array access in ACPI package parsing\n\nThe hp_populate_*_elements_from_package() functions in the hp-bioscfg\ndriver contain out-of-bounds array access vulnerabilities.\n\nThese functions parse ACPI packages into internal data structures using\na for loop with index variable 'elem' that iterates through\nenum_obj/integer_obj/order_obj/password_obj/string_obj arrays.\n\nWhen processing multi-element fields like PREREQUISITES and\nENUM_POSSIBLE_VALUES, these functions read multiple consecutive array\nelements using expressions like 'enum_obj[elem + reqs]' and\n'enum_obj[elem + pos_values]' within nested loops.\n\nThe bug is that the bounds check only validated elem, but did not consider\nthe additional offset when accessing elem + reqs or elem + pos_values.\n\nThe fix changes the bounds check to validate the actual accessed index."
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      "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nplatform/x86: hp-bioscfg: Corrección de acceso a array fuera de límites en el análisis de paquetes ACPI\n\nLas funciones hp_populate_*_elements_from_package() en el controlador hp-bioscfg contienen vulnerabilidades de acceso a array fuera de límites.\n\nEstas funciones analizan paquetes ACPI en estructuras de datos internas utilizando un bucle for con la variable de índice 'elem' que itera a través de arrays enum_obj/integer_obj/order_obj/password_obj/string_obj.\n\nAl procesar campos de múltiples elementos como PREREQUISITES y ENUM_POSSIBLE_VALUES, estas funciones leen múltiples elementos de array consecutivos utilizando expresiones como 'enum_obj[elem + reqs]' y 'enum_obj[elem + pos_values]' dentro de bucles anidados.\n\nEl error es que la comprobación de límites solo validaba elem, pero no consideraba el desplazamiento adicional al acceder a elem + reqs o elem + pos_values.\n\nLa corrección cambia la comprobación de límites para validar el índice real accedido."
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