CVE-2025-38056

Estado: AnalizadaAlta (7.8)—

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

ASoC: SOF: Intel: hda: Fix UAF when reloading module

hda_generic_machine_select() appends -idisp to the tplg filename by allocating a new string with devm_kasprintf(), then stores the string right back into the global variable snd_soc_acpi_intel_hda_machines. When the module is unloaded, this memory is freed, resulting in a global variable pointing to freed memory. Reloading the module then triggers a use-after-free:

kfence-#99: 0x00000000198a940f-0x00000000ace47d9d, size=64, cache=kmalloc-64

Fix it by copying the match array with devm_kmemdup_array() before we modify it.

Detalles técnicos trazas, registros y código del informe original

BUG: KFENCE: use-after-free read in string+0x48/0xe0

Use-after-free read at 0x00000000967e0109 (in kfence-#99):
 string+0x48/0xe0
 vsnprintf+0x329/0x6e0
 devm_kvasprintf+0x54/0xb0
 devm_kasprintf+0x58/0x80
 hda_machine_select.cold+0x198/0x17a2 [snd_sof_intel_hda_generic]
 sof_probe_work+0x7f/0x600 [snd_sof]
 process_one_work+0x17b/0x330
 worker_thread+0x2ce/0x3f0
 kthread+0xcf/0x100
 ret_from_fork+0x31/0x50
 ret_from_fork_asm+0x1a/0x30

allocated by task 333 on cpu 8 at 17.798069s (130.453553s ago):
 devm_kmalloc+0x52/0x120
 devm_kvasprintf+0x66/0xb0
 devm_kasprintf+0x58/0x80
 hda_machine_select.cold+0x198/0x17a2 [snd_sof_intel_hda_generic]
 sof_probe_work+0x7f/0x600 [snd_sof]
 process_one_work+0x17b/0x330
 worker_thread+0x2ce/0x3f0
 kthread+0xcf/0x100
 ret_from_fork+0x31/0x50
 ret_from_fork_asm+0x1a/0x30

freed by task 1543 on cpu 4 at 141.586686s (6.665010s ago):
 release_nodes+0x43/0xb0
 devres_release_all+0x90/0xf0
 device_unbind_cleanup+0xe/0x70
 device_release_driver_internal+0x1c1/0x200
 driver_detach+0x48/0x90
 bus_remove_driver+0x6d/0xf0
 pci_unregister_driver+0x42/0xb0
 __do_sys_delete_module+0x1d1/0x310
 do_syscall_64+0x82/0x190
 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: 0.19%
Percentil entre todas las CVEs puntuadas: 8
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 %

UAF en kernel con acceso local (AV:L, PR:L) permite ejecución de código arbitrario tras recarga de módulo; vector CVSS confirma impacto crítico en confidencialidad, integridad y disponibilidad.

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

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

Tecnologías afectadas (1)

Linux — Linux Kernel

CWE

CWE-416

Referencias

JSON original (NVD)

Mostrar

{
  "id": "CVE-2025-38056",
  "cveTags": [],
  "metrics": {
    "cvssMetricV31": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 7.8,
          "attackVector": "LOCAL",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.9,
        "exploitabilityScore": 1.8
      }
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      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
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              "lessThan": "2b49e68360eb6a1c03dc1642a51f7d9f6784c034",
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              "versionType": "git"
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          ],
          "programFiles": [
            "sound/soc/sof/intel/hda.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
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              "version": "0",
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              "versionType": "semver"
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              "status": "unaffected",
              "version": "6.14.9",
              "versionType": "semver",
              "lessThanOrEqual": "6.14.*"
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              "status": "unaffected",
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              "versionType": "original_commit_for_fix",
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          "programFiles": [
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          "defaultStatus": "affected"
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  "published": "2025-06-18T10:15:38.340",
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      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-416"
        }
      ]
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  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nASoC: SOF: Intel: hda: Fix UAF when reloading module\n\nhda_generic_machine_select() appends -idisp to the tplg filename by\nallocating a new string with devm_kasprintf(), then stores the string\nright back into the global variable snd_soc_acpi_intel_hda_machines.\nWhen the module is unloaded, this memory is freed, resulting in a global\nvariable pointing to freed memory.  Reloading the module then triggers\na use-after-free:\n\nBUG: KFENCE: use-after-free read in string+0x48/0xe0\n\nUse-after-free read at 0x00000000967e0109 (in kfence-#99):\n string+0x48/0xe0\n vsnprintf+0x329/0x6e0\n devm_kvasprintf+0x54/0xb0\n devm_kasprintf+0x58/0x80\n hda_machine_select.cold+0x198/0x17a2 [snd_sof_intel_hda_generic]\n sof_probe_work+0x7f/0x600 [snd_sof]\n process_one_work+0x17b/0x330\n worker_thread+0x2ce/0x3f0\n kthread+0xcf/0x100\n ret_from_fork+0x31/0x50\n ret_from_fork_asm+0x1a/0x30\n\nkfence-#99: 0x00000000198a940f-0x00000000ace47d9d, size=64, cache=kmalloc-64\n\nallocated by task 333 on cpu 8 at 17.798069s (130.453553s ago):\n devm_kmalloc+0x52/0x120\n devm_kvasprintf+0x66/0xb0\n devm_kasprintf+0x58/0x80\n hda_machine_select.cold+0x198/0x17a2 [snd_sof_intel_hda_generic]\n sof_probe_work+0x7f/0x600 [snd_sof]\n process_one_work+0x17b/0x330\n worker_thread+0x2ce/0x3f0\n kthread+0xcf/0x100\n ret_from_fork+0x31/0x50\n ret_from_fork_asm+0x1a/0x30\n\nfreed by task 1543 on cpu 4 at 141.586686s (6.665010s ago):\n release_nodes+0x43/0xb0\n devres_release_all+0x90/0xf0\n device_unbind_cleanup+0xe/0x70\n device_release_driver_internal+0x1c1/0x200\n driver_detach+0x48/0x90\n bus_remove_driver+0x6d/0xf0\n pci_unregister_driver+0x42/0xb0\n __do_sys_delete_module+0x1d1/0x310\n do_syscall_64+0x82/0x190\n entry_SYSCALL_64_after_hwframe+0x76/0x7e\n\nFix it by copying the match array with devm_kmemdup_array() before we\nmodify it."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: ASoC: SOF: Intel: hda: Se corrige el UAF al recargar el módulo. hda_generic_machine_select() añade -idisp al nombre de archivo tplg asignando una nueva cadena con devm_kasprintf() y luego la almacena directamente en la variable global snd_soc_acpi_intel_hda_machines. Al descargar el módulo, se libera esta memoria, lo que genera una variable global que apunta a la memoria liberada. Recargar el módulo luego activa un use-after-free: ERROR: KFENCE: use-after-free read in string+0x48/0xe0 Use-after-free read at 0x00000000967e0109 (in kfence-#99): string+0x48/0xe0 vsnprintf+0x329/0x6e0 devm_kvasprintf+0x54/0xb0 devm_kasprintf+0x58/0x80 hda_machine_select.cold+0x198/0x17a2 [snd_sof_intel_hda_generic] sof_probe_work+0x7f/0x600 [snd_sof] process_one_work+0x17b/0x330 worker_thread+0x2ce/0x3f0 kthread+0xcf/0x100 ret_from_fork+0x31/0x50 ret_from_fork_asm+0x1a/0x30 kfence-#99: 0x00000000198a940f-0x00000000ace47d9d, size=64, cache=kmalloc-64 allocated by task 333 on cpu 8 at 17.798069s (130.453553s ago): devm_kmalloc+0x52/0x120 devm_kvasprintf+0x66/0xb0 devm_kasprintf+0x58/0x80 hda_machine_select.cold+0x198/0x17a2 [snd_sof_intel_hda_generic] sof_probe_work+0x7f/0x600 [snd_sof] process_one_work+0x17b/0x330 worker_thread+0x2ce/0x3f0 kthread+0xcf/0x100 ret_from_fork+0x31/0x50 ret_from_fork_asm+0x1a/0x30 freed by task 1543 on cpu 4 at 141.586686s (6.665010s ago): release_nodes+0x43/0xb0 devres_release_all+0x90/0xf0 device_unbind_cleanup+0xe/0x70 device_release_driver_internal+0x1c1/0x200 driver_detach+0x48/0x90 bus_remove_driver+0x6d/0xf0 pci_unregister_driver+0x42/0xb0 __do_sys_delete_module+0x1d1/0x310 do_syscall_64+0x82/0x190 entry_SYSCALL_64_after_hwframe+0x76/0x7e Corríjalo copiando la matriz de coincidencia con devm_kmemdup_array() antes de modificarla."
    }
  ],
  "lastModified": "2026-06-17T09:15:57.970",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
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