CVE-2025-38239

Estado: ModificadaAlta (7.8)—

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

scsi: megaraid_sas: Fix invalid node index

On a system with DRAM interleave enabled, out-of-bound access is detected:

Fix it accordingly.

Detalles técnicos trazas, registros y código del informe original

megaraid_sas 0000:3f:00.0: requested/available msix 128/128 poll_queue 0
------------[ cut here ]------------
UBSAN: array-index-out-of-bounds in ./arch/x86/include/asm/topology.h:72:28
index -1 is out of range for type 'cpumask *[1024]'
dump_stack_lvl+0x5d/0x80
ubsan_epilogue+0x5/0x2b
__ubsan_handle_out_of_bounds.cold+0x46/0x4b
megasas_alloc_irq_vectors+0x149/0x190 [megaraid_sas]
megasas_probe_one.cold+0xa4d/0x189c [megaraid_sas]
local_pci_probe+0x42/0x90
pci_device_probe+0xdc/0x290
really_probe+0xdb/0x340
__driver_probe_device+0x78/0x110
driver_probe_device+0x1f/0xa0
__driver_attach+0xba/0x1c0
bus_for_each_dev+0x8b/0xe0
bus_add_driver+0x142/0x220
driver_register+0x72/0xd0
megasas_init+0xdf/0xff0 [megaraid_sas]
do_one_initcall+0x57/0x310
do_init_module+0x90/0x250
init_module_from_file+0x85/0xc0
idempotent_init_module+0x114/0x310
__x64_sys_finit_module+0x65/0xc0
do_syscall_64+0x82/0x170
entry_SYSCALL_64_after_hwframe+0x76/0x7e

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: 0.16%
Percentil entre todas las CVEs puntuadas: 5
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 %

Vulnerabilidad local (AV:L, PR:L) en controlador megaraid_sas del kernel Linux que causa out-of-bounds array access (CWE-129). El atacante con privilegios locales puede provocar DoS explotando el desbordamiento de índice en megasas_alloc_irq_vectors()

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 Execution Prevention Application Isolation and Sandboxing Exploit Protection Update Software

Tecnologías afectadas (2)

Debian — Debian Linux Linux — Linux Kernel

CWE

CWE-129

Referencias

JSON original (NVD)

Mostrar

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      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: megaraid_sas: Fix invalid node index\n\nOn a system with DRAM interleave enabled, out-of-bound access is\ndetected:\n\nmegaraid_sas 0000:3f:00.0: requested/available msix 128/128 poll_queue 0\n------------[ cut here ]------------\nUBSAN: array-index-out-of-bounds in ./arch/x86/include/asm/topology.h:72:28\nindex -1 is out of range for type 'cpumask *[1024]'\ndump_stack_lvl+0x5d/0x80\nubsan_epilogue+0x5/0x2b\n__ubsan_handle_out_of_bounds.cold+0x46/0x4b\nmegasas_alloc_irq_vectors+0x149/0x190 [megaraid_sas]\nmegasas_probe_one.cold+0xa4d/0x189c [megaraid_sas]\nlocal_pci_probe+0x42/0x90\npci_device_probe+0xdc/0x290\nreally_probe+0xdb/0x340\n__driver_probe_device+0x78/0x110\ndriver_probe_device+0x1f/0xa0\n__driver_attach+0xba/0x1c0\nbus_for_each_dev+0x8b/0xe0\nbus_add_driver+0x142/0x220\ndriver_register+0x72/0xd0\nmegasas_init+0xdf/0xff0 [megaraid_sas]\ndo_one_initcall+0x57/0x310\ndo_init_module+0x90/0x250\ninit_module_from_file+0x85/0xc0\nidempotent_init_module+0x114/0x310\n__x64_sys_finit_module+0x65/0xc0\ndo_syscall_64+0x82/0x170\nentry_SYSCALL_64_after_hwframe+0x76/0x7e\n\nFix it accordingly."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: scsi: megaraid_sas: Se corrige un índice de nodo no válido. En un sistema con intercalación de DRAM habilitada, se detecta acceso fuera de los límites: megaraid_sas 0000:3f:00.0: solicitado/disponible msix 128/128 poll_queue 0 ------------[ cut here ]------------ UBSAN: array-index-out-of-bounds in ./arch/x86/include/asm/topology.h:72:28 index -1 is out of range for type 'cpumask *[1024]' dump_stack_lvl+0x5d/0x80 ubsan_epilogue+0x5/0x2b __ubsan_handle_out_of_bounds.cold+0x46/0x4b megasas_alloc_irq_vectors+0x149/0x190 [megaraid_sas] megasas_probe_one.cold+0xa4d/0x189c [megaraid_sas] local_pci_probe+0x42/0x90 pci_device_probe+0xdc/0x290 really_probe+0xdb/0x340 __driver_probe_device+0x78/0x110 driver_probe_device+0x1f/0xa0 __driver_attach+0xba/0x1c0 bus_for_each_dev+0x8b/0xe0 bus_add_driver+0x142/0x220 driver_register+0x72/0xd0 megasas_init+0xdf/0xff0 [megaraid_sas] do_one_initcall+0x57/0x310 do_init_module+0x90/0x250 init_module_from_file+0x85/0xc0 idempotent_init_module+0x114/0x310 __x64_sys_finit_module+0x65/0xc0 do_syscall_64+0x82/0x170 entry_SYSCALL_64_after_hwframe+0x76/0x7e Corríjalo como corresponda."
    }
  ],
  "lastModified": "2026-07-30T06:23:03.330",
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