« Volver al listado

CVE-2025-21644

Estado: ModificadaMedia (5.5)—

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

drm/xe: Fix tlb invalidation when wedging

If GuC fails to load, the driver wedges, but in the process it tries to do stuff that may not be initialized yet. This moves the xe_gt_tlb_invalidation_init() to be done earlier: as its own doc says, it's a software-only initialization and should had been named with the _early() suffix.

Move it to be called by xe_gt_init_early(), so the locks and seqno are initialized, avoiding a NULL ptr deref when wedging:

This can be easily triggered by poking the GuC binary to force a signature failure. There will still be an extra message,

Leer descripción completaMostrar menos

but that's better than a NULL ptr deref.

(cherry picked from commit 5001ef3af8f2c972d6fd9c5221a8457556f8bea6)

Detalles técnicos trazas, registros y código del informe original
	xe 0000:03:00.0: [drm] *ERROR* GT0: load failed: status: Reset = 0, BootROM = 0x50, UKernel = 0x00, MIA = 0x00, Auth = 0x01
	xe 0000:03:00.0: [drm] *ERROR* GT0: firmware signature verification failed
	xe 0000:03:00.0: [drm] *ERROR* CRITICAL: Xe has declared device 0000:03:00.0 as wedged.
	...
	BUG: kernel NULL pointer dereference, address: 0000000000000000
	#PF: supervisor read access in kernel mode
	#PF: error_code(0x0000) - not-present page
	PGD 0 P4D 0
	Oops: Oops: 0000 [#1] PREEMPT SMP NOPTI
	CPU: 9 UID: 0 PID: 3908 Comm: modprobe Tainted: G     U  W          6.13.0-rc4-xe+ #3
	Tainted: [U]=USER, [W]=WARN
	Hardware name: Intel Corporation Alder Lake Client Platform/AlderLake-S ADP-S DDR5 UDIMM CRB, BIOS ADLSFWI1.R00.3275.A00.2207010640 07/01/2022
	RIP: 0010:xe_gt_tlb_invalidation_reset+0x75/0x110 [xe]

	xe 0000:03:00.0: [drm] *ERROR* GT0: GuC mmio request 0x4100: no reply 0x4100

CVSS

Probabilidad de explotación (EPSS)

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).

Tecnologías afectadas (1)

Linux — Linux Kernel

CWE

Referencias

JSON original (NVD)

Mostrar
{
  "id": "CVE-2025-21644",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2025-21644",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2025-10-01T19:53:56.752073Z"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 5.5,
          "attackVector": "LOCAL",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 1.8
      },
      {
        "type": "Secondary",
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 5.5,
          "attackVector": "LOCAL",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 1.8
      }
    ]
  },
  "affected": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "affectedData": [
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "c9474b726b932b5d555effd9ed0ae19f4da2367c",
              "lessThan": "09b94ddc58c6640cbbc7775a61a5387b8be71488",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "c9474b726b932b5d555effd9ed0ae19f4da2367c",
              "lessThan": "9ab4981552930a9c45682d62424ba610edc3992d",
              "versionType": "git"
            }
          ],
          "programFiles": [
            "drivers/gpu/drm/xe/xe_gt.c",
            "drivers/gpu/drm/xe/xe_gt_tlb_invalidation.c",
            "drivers/gpu/drm/xe/xe_gt_tlb_invalidation.h"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.11"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "6.11",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "6.12.10",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "status": "unaffected",
              "version": "6.13",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "drivers/gpu/drm/xe/xe_gt.c",
            "drivers/gpu/drm/xe/xe_gt_tlb_invalidation.c",
            "drivers/gpu/drm/xe/xe_gt_tlb_invalidation.h"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2025-01-19T11:15:09.977",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/09b94ddc58c6640cbbc7775a61a5387b8be71488",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/9ab4981552930a9c45682d62424ba610edc3992d",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-476"
        }
      ]
    },
    {
      "type": "Secondary",
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "description": [
        {
          "lang": "en",
          "value": "CWE-476"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/xe: Fix tlb invalidation when wedging\n\nIf GuC fails to load, the driver wedges, but in the process it tries to\ndo stuff that may not be initialized yet. This moves the\nxe_gt_tlb_invalidation_init() to be done earlier: as its own doc says,\nit's a software-only initialization and should had been named with the\n_early() suffix.\n\nMove it to be called by xe_gt_init_early(), so the locks and seqno are\ninitialized, avoiding a NULL ptr deref when wedging:\n\n\txe 0000:03:00.0: [drm] *ERROR* GT0: load failed: status: Reset = 0, BootROM = 0x50, UKernel = 0x00, MIA = 0x00, Auth = 0x01\n\txe 0000:03:00.0: [drm] *ERROR* GT0: firmware signature verification failed\n\txe 0000:03:00.0: [drm] *ERROR* CRITICAL: Xe has declared device 0000:03:00.0 as wedged.\n\t...\n\tBUG: kernel NULL pointer dereference, address: 0000000000000000\n\t#PF: supervisor read access in kernel mode\n\t#PF: error_code(0x0000) - not-present page\n\tPGD 0 P4D 0\n\tOops: Oops: 0000 [#1] PREEMPT SMP NOPTI\n\tCPU: 9 UID: 0 PID: 3908 Comm: modprobe Tainted: G     U  W          6.13.0-rc4-xe+ #3\n\tTainted: [U]=USER, [W]=WARN\n\tHardware name: Intel Corporation Alder Lake Client Platform/AlderLake-S ADP-S DDR5 UDIMM CRB, BIOS ADLSFWI1.R00.3275.A00.2207010640 07/01/2022\n\tRIP: 0010:xe_gt_tlb_invalidation_reset+0x75/0x110 [xe]\n\nThis can be easily triggered by poking the GuC binary to force a\nsignature failure. There will still be an extra message,\n\n\txe 0000:03:00.0: [drm] *ERROR* GT0: GuC mmio request 0x4100: no reply 0x4100\n\nbut that's better than a NULL ptr deref.\n\n(cherry picked from commit 5001ef3af8f2c972d6fd9c5221a8457556f8bea6)"
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: drm/xe: Se corrige la invalidación de tlb al realizar un wedging. Si GuC no se carga, el controlador realiza un wedging, pero en el proceso intenta hacer cosas que quizás aún no se hayan inicializado. Esto hace que xe_gt_tlb_invalidation_init() se realice antes: como dice su propia documentación, es una inicialización solo de software y debería haber sido nombrada con el sufijo _early(). Muévelo para que sea llamado por xe_gt_init_early(), de modo que los bloqueos y seqno se inicialicen, evitando un ptr deref NULL al realizar cuñas: xe 0000:03:00.0: [drm] *ERROR* GT0: carga fallida: estado: Reset = 0, BootROM = 0x50, UKernel = 0x00, MIA = 0x00, Auth = 0x01 xe 0000:03:00.0: [drm] *ERROR* GT0: verificación de firma de firmware fallida xe 0000:03:00.0: [drm] *ERROR* CRÍTICO: Xe ha declarado el dispositivo 0000:03:00.0 como cuñado. ... ERROR: desreferencia de puntero NULL del kernel, dirección: 0000000000000000 #PF: acceso de lectura del supervisor en modo kernel #PF: error_code(0x0000) - página no presente PGD 0 P4D 0 Oops: Oops: 0000 [#1] PREEMPT SMP NOPTI CPU: 9 UID: 0 PID: 3908 Comm: modprobe Contaminado: GUW 6.13.0-rc4-xe+ #3 Contaminado: [U]=USER, [W]=WARN Nombre del hardware: Intel Corporation Alder Lake Client Platform/AlderLake-S ADP-S DDR5 UDIMM CRB, BIOS ADLSFWI1.R00.3275.A00.2207010640 01/07/2022 RIP: 0010:xe_gt_tlb_invalidation_reset+0x75/0x110 [xe] Esto se puede activar fácilmente al presionar el binario GuC para forzar un error de firma. Aún habrá un mensaje adicional, xe 0000:03:00.0: [drm] *ERROR* GT0: Solicitud mmio GuC 0x4100: no hay respuesta 0x4100 pero eso es mejor que una desreferencia de ptr NULL. (seleccionado de el commit 5001ef3af8f2c972d6fd9c5221a8457556f8bea6)"
    }
  ],
  "lastModified": "2026-06-17T08:43:55.237",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "AD20F8BA-D1BC-4584-8C68-17E958381157",
              "versionEndExcluding": "6.12.10",
              "versionStartIncluding": "6.11"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:6.13:rc1:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "62567B3C-6CEE-46D0-BC2E-B3717FBF7D13"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:6.13:rc2:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "5A073481-106D-4B15-B4C7-FB0213B8E1D4"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:6.13:rc3:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "DE491969-75AE-4A6B-9A58-8FC5AF98798F"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:6.13:rc4:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "93C0660D-7FB8-4FBA-892A-B064BA71E49E"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:6.13:rc5:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "034C36A6-C481-41F3-AE9A-D116E5BE6895"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:6.13:rc6:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "8AF9DC49-2085-4FFB-A7E3-73DFAFECC7F2"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}