CVE-2023-53112

Estado: AnalizadaAlta (7.1)—

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

drm/i915/sseu: fix max_subslices array-index-out-of-bounds access

It seems that commit bc3c5e0809ae ("drm/i915/sseu: Don't try to store EU mask internally in UAPI format") exposed a potential out-of-bounds access, reported by UBSAN as following on a laptop with a gen 11 i915 card:

According to the definition of sseu_dev_info, eu_mask->hsw is limited to a maximum of GEN_MAX_SS_PER_HSW_SLICE (6) sub-slices, but gen11_sseu_info_init() can potentially set 8 sub-slices, in the !IS_JSL_EHL(gt->i915) case.

Fix this by reserving up to 8 slots for max_subslices in the eu_mask struct.

Leer descripción completaMostrar menos

(cherry picked from commit 3cba09a6ac86ea1d456909626eb2685596c07822)

Detalles técnicos trazas, registros y código del informe original

  UBSAN: array-index-out-of-bounds in drivers/gpu/drm/i915/gt/intel_sseu.c:65:27
  index 6 is out of range for type 'u16 [6]'
  CPU: 2 PID: 165 Comm: systemd-udevd Not tainted 6.2.0-9-generic #9-Ubuntu
  Hardware name: Dell Inc. XPS 13 9300/077Y9N, BIOS 1.11.0 03/22/2022
  Call Trace:
   <TASK>
   show_stack+0x4e/0x61
   dump_stack_lvl+0x4a/0x6f
   dump_stack+0x10/0x18
   ubsan_epilogue+0x9/0x3a
   __ubsan_handle_out_of_bounds.cold+0x42/0x47
   gen11_compute_sseu_info+0x121/0x130 [i915]
   intel_sseu_info_init+0x15d/0x2b0 [i915]
   intel_gt_init_mmio+0x23/0x40 [i915]
   i915_driver_mmio_probe+0x129/0x400 [i915]
   ? intel_gt_probe_all+0x91/0x2e0 [i915]
   i915_driver_probe+0xe1/0x3f0 [i915]
   ? drm_privacy_screen_get+0x16d/0x190 [drm]
   ? acpi_dev_found+0x64/0x80
   i915_pci_probe+0xac/0x1b0 [i915]
   ...

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: 0.20%
Percentil entre todas las CVEs puntuadas: 10
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 escalation75 %
Impacto principalT1059 Command and Scripting Interpreterexecution60 %

Acceso local (AV:L) sin interacción de usuario, escalada de privilegios mediante corrupción de memoria (out-of-bounds array access en kernel). El desbordamiento podría permitir ejecución de código en contexto privilegiado.

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-125

Referencias

JSON original (NVD)

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{
  "id": "CVE-2023-53112",
  "cveTags": [],
  "metrics": {
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        "type": "Primary",
        "source": "nvd@nist.gov",
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          "baseScore": 7.1,
          "attackVector": "LOCAL",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "HIGH"
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      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/i915/sseu: fix max_subslices array-index-out-of-bounds access\n\nIt seems that commit bc3c5e0809ae (\"drm/i915/sseu: Don't try to store EU\nmask internally in UAPI format\") exposed a potential out-of-bounds\naccess, reported by UBSAN as following on a laptop with a gen 11 i915\ncard:\n\n  UBSAN: array-index-out-of-bounds in drivers/gpu/drm/i915/gt/intel_sseu.c:65:27\n  index 6 is out of range for type 'u16 [6]'\n  CPU: 2 PID: 165 Comm: systemd-udevd Not tainted 6.2.0-9-generic #9-Ubuntu\n  Hardware name: Dell Inc. XPS 13 9300/077Y9N, BIOS 1.11.0 03/22/2022\n  Call Trace:\n   <TASK>\n   show_stack+0x4e/0x61\n   dump_stack_lvl+0x4a/0x6f\n   dump_stack+0x10/0x18\n   ubsan_epilogue+0x9/0x3a\n   __ubsan_handle_out_of_bounds.cold+0x42/0x47\n   gen11_compute_sseu_info+0x121/0x130 [i915]\n   intel_sseu_info_init+0x15d/0x2b0 [i915]\n   intel_gt_init_mmio+0x23/0x40 [i915]\n   i915_driver_mmio_probe+0x129/0x400 [i915]\n   ? intel_gt_probe_all+0x91/0x2e0 [i915]\n   i915_driver_probe+0xe1/0x3f0 [i915]\n   ? drm_privacy_screen_get+0x16d/0x190 [drm]\n   ? acpi_dev_found+0x64/0x80\n   i915_pci_probe+0xac/0x1b0 [i915]\n   ...\n\nAccording to the definition of sseu_dev_info, eu_mask->hsw is limited to\na maximum of GEN_MAX_SS_PER_HSW_SLICE (6) sub-slices, but\ngen11_sseu_info_init() can potentially set 8 sub-slices, in the\n!IS_JSL_EHL(gt->i915) case.\n\nFix this by reserving up to 8 slots for max_subslices in the eu_mask\nstruct.\n\n(cherry picked from commit 3cba09a6ac86ea1d456909626eb2685596c07822)"
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: drm/i915/sseu: fix max_subslices array-index-out-of-bounds access Parece que el commit bc3c5e0809ae (\"drm/i915/sseu: No intente almacenar la máscara EU internamente en formato UAPI\") expuso un posible acceso fuera de los límites, informado por UBSAN de la siguiente manera en una computadora portátil con una tarjeta i915 gen 11: UBSAN: array-index-out-of-bounds en drivers/gpu/drm/i915/gt/intel_sseu.c:65:27 el índice 6 está fuera de rango para el tipo 'u16 [6]' CPU: 2 PID: 165 Comm: systemd-udevd No contaminado 6.2.0-9-generic #9-Ubuntu Nombre del hardware: Dell Inc. XPS 13 9300/077Y9N, BIOS 1.11.0 22/03/2022 Seguimiento de llamadas:  show_stack+0x4e/0x61 dump_stack_lvl+0x4a/0x6f dump_stack+0x10/0x18 ubsan_epilogue+0x9/0x3a __ubsan_handle_out_of_bounds.cold+0x42/0x47 gen11_compute_sseu_info+0x121/0x130 [i915] intel_sseu_info_init+0x15d/0x2b0 [i915] intel_gt_init_mmio+0x23/0x40 [i915] i915_driver_mmio_probe+0x129/0x400 [i915] ? intel_gt_probe_all+0x91/0x2e0 [i915] i915_driver_probe+0xe1/0x3f0 [i915] ? drm_privacy_screen_get+0x16d/0x190 [drm] ? acpi_dev_found+0x64/0x80 i915_pci_probe+0xac/0x1b0 [i915] ... Según la definición de sseu_dev_info, eu_mask-&gt;hsw está limitado a un máximo de GEN_MAX_SS_PER_HSW_SLICE (6) subsecciones, pero gen11_sseu_info_init() puede establecer potencialmente 8 subsecciones, en el caso de !IS_JSL_EHL(gt-&gt;i915). Para solucionar esto, reserve hasta 8 espacios para max_subslices en la estructura eu_mask. (Seleccionado de la confirmación 3cba09a6ac86ea1d456909626eb2685596c07822)"
    }
  ],
  "lastModified": "2026-06-17T06:44:19.323",
  "configurations": [
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