CVE-2026-46278

Estado: AnalizadaMedia (5.5)—

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

drm/imagination: Fix segfault when updating ftrace mask

Fix invalid data access by passing right data for debugfs entry.

Detalles técnicos trazas, registros y código del informe original

[  171.549793] Unable to handle kernel NULL pointer dereference at virtual address 0000000000000000
[  171.559248] Mem abort info:
[  171.562173]   ESR = 0x0000000096000044
[  171.566227]   EC = 0x25: DABT (current EL), IL = 32 bits
[  171.573108]   SET = 0, FnV = 0
[  171.576448]   EA = 0, S1PTW = 0
[  171.579745]   FSC = 0x04: level 0 translation fault
[  171.584760] Data abort info:
[  171.588012]   ISV = 0, ISS = 0x00000044, ISS2 = 0x00000000
[  171.593734]   CM = 0, WnR = 1, TnD = 0, TagAccess = 0
[  171.598962]   GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0
[  171.604471] user pgtable: 4k pages, 48-bit VAs, pgdp=0000000083837000
[  171.611358] [0000000000000000] pgd=0000000000000000, p4d=0000000000000000
[  171.618500] Internal error: Oops: 0000000096000044 [#1]  SMP
[  171.624222] Modules linked in: powervr drm_shmem_helper drm_gpuvm...
[  171.656580] CPU: 0 UID: 0 PID: 549 Comm: bash Not tainted 7.0.0-rc2-g730b257ba723-dirty #13 PREEMPT
[  171.665773] Hardware name: BeagleBoard.org BeaglePlay (DT)
[  171.671296] pstate: 20000005 (nzCv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--)
[  171.678306] pc : pvr_fw_trace_mask_set+0x78/0x154 [powervr]
[  171.683959] lr : pvr_fw_trace_mask_set+0x4c/0x154 [powervr]
[  171.689593] sp : ffff8000835ebb90
[  171.692929] x29: ffff8000835ebc00 x28: ffff000005c60f80 x27: 0000000000000000
[  171.700130] x26: 0000000000000000 x25: ffff00000504af28 x24: 0000000000000000
[  171.707324] x23: ffff00000504af50 x22: 0000000000000203 x21: 0000000000000000
[  171.714518] x20: ffff000005c44a80 x19: ffff000005c457b8 x18: 0000000000000000
[  171.721715] x17: 0000000000000000 x16: 0000000000000000 x15: 0000aaaae8887580
[  171.728908] x14: 0000000000000000 x13: 0000000000000000 x12: ffff8000835ebc30
[  171.736095] x11: ffff00000504af2a x10: ffff00008504af29 x9 : 0fffffffffffffff
[  171.743286] x8 : ffff8000835ebbf8 x7 : 0000000000000000 x6 : 000000000000002a
[  171.750479] x5 : ffff00000504af2e x4 : 0000000000000000 x3 : 0000000000000010
[  171.757674] x2 : 0000000000000203 x1 : 0000000000000000 x0 : ffff8000835ebba0
[  171.764871] Call trace:
[  171.767342]  pvr_fw_trace_mask_set+0x78/0x154 [powervr] (P)
[  171.772984]  simple_attr_write_xsigned.isra.0+0xe0/0x19c
[  171.778341]  simple_attr_write+0x18/0x24
[  171.782296]  debugfs_attr_write+0x50/0x98
[  171.786341]  full_proxy_write+0x6c/0xa8
[  171.790208]  vfs_write+0xd4/0x350
[  171.793561]  ksys_write+0x70/0x108
[  171.796995]  __arm64_sys_write+0x1c/0x28
[  171.800952]  invoke_syscall+0x48/0x10c
[  171.804740]  el0_svc_common.constprop.0+0x40/0xe0
[  171.809487]  do_el0_svc+0x1c/0x28
[  171.812834]  el0_svc+0x34/0x108
[  171.816013]  el0t_64_sync_handler+0xa0/0xe4
[  171.820237]  el0t_64_sync+0x198/0x19c
[  171.823939] Code: 32000262 b90ac293 1a931056 9134e293 (b9000036)
[  171.830073] ---[ end trace 0000000000000000 ]---

CVSS

Versión: 3.1
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Puntuación base: 5.5

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).

Tecnologías afectadas (1)

Linux — Linux Kernel

CWE

CWE-476

Referencias

JSON original (NVD)

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{
  "id": "CVE-2026-46278",
  "cveTags": [],
  "metrics": {
    "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
      }
    ]
  },
  "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": "a331631496a0af9a6f4e7e1860983afd8b1bb013",
              "lessThan": "ba422758981b61585c7da6429f50ef1c58d326f7",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "a331631496a0af9a6f4e7e1860983afd8b1bb013",
              "lessThan": "5dfd429591f8d7185bf63a08b5c30863fb605611",
              "versionType": "git"
            }
          ],
          "programFiles": [
            "drivers/gpu/drm/imagination/pvr_fw_trace.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "7.0"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "7.0",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "7.0.4",
              "versionType": "semver",
              "lessThanOrEqual": "7.0.*"
            },
            {
              "status": "unaffected",
              "version": "7.1",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "drivers/gpu/drm/imagination/pvr_fw_trace.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2026-06-08T17:16:45.390",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/5dfd429591f8d7185bf63a08b5c30863fb605611",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/ba422758981b61585c7da6429f50ef1c58d326f7",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-476"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/imagination: Fix segfault when updating ftrace mask\n\nFix invalid data access by passing right data for debugfs entry.\n\n[  171.549793] Unable to handle kernel NULL pointer dereference at virtual address 0000000000000000\n[  171.559248] Mem abort info:\n[  171.562173]   ESR = 0x0000000096000044\n[  171.566227]   EC = 0x25: DABT (current EL), IL = 32 bits\n[  171.573108]   SET = 0, FnV = 0\n[  171.576448]   EA = 0, S1PTW = 0\n[  171.579745]   FSC = 0x04: level 0 translation fault\n[  171.584760] Data abort info:\n[  171.588012]   ISV = 0, ISS = 0x00000044, ISS2 = 0x00000000\n[  171.593734]   CM = 0, WnR = 1, TnD = 0, TagAccess = 0\n[  171.598962]   GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0\n[  171.604471] user pgtable: 4k pages, 48-bit VAs, pgdp=0000000083837000\n[  171.611358] [0000000000000000] pgd=0000000000000000, p4d=0000000000000000\n[  171.618500] Internal error: Oops: 0000000096000044 [#1]  SMP\n[  171.624222] Modules linked in: powervr drm_shmem_helper drm_gpuvm...\n[  171.656580] CPU: 0 UID: 0 PID: 549 Comm: bash Not tainted 7.0.0-rc2-g730b257ba723-dirty #13 PREEMPT\n[  171.665773] Hardware name: BeagleBoard.org BeaglePlay (DT)\n[  171.671296] pstate: 20000005 (nzCv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--)\n[  171.678306] pc : pvr_fw_trace_mask_set+0x78/0x154 [powervr]\n[  171.683959] lr : pvr_fw_trace_mask_set+0x4c/0x154 [powervr]\n[  171.689593] sp : ffff8000835ebb90\n[  171.692929] x29: ffff8000835ebc00 x28: ffff000005c60f80 x27: 0000000000000000\n[  171.700130] x26: 0000000000000000 x25: ffff00000504af28 x24: 0000000000000000\n[  171.707324] x23: ffff00000504af50 x22: 0000000000000203 x21: 0000000000000000\n[  171.714518] x20: ffff000005c44a80 x19: ffff000005c457b8 x18: 0000000000000000\n[  171.721715] x17: 0000000000000000 x16: 0000000000000000 x15: 0000aaaae8887580\n[  171.728908] x14: 0000000000000000 x13: 0000000000000000 x12: ffff8000835ebc30\n[  171.736095] x11: ffff00000504af2a x10: ffff00008504af29 x9 : 0fffffffffffffff\n[  171.743286] x8 : ffff8000835ebbf8 x7 : 0000000000000000 x6 : 000000000000002a\n[  171.750479] x5 : ffff00000504af2e x4 : 0000000000000000 x3 : 0000000000000010\n[  171.757674] x2 : 0000000000000203 x1 : 0000000000000000 x0 : ffff8000835ebba0\n[  171.764871] Call trace:\n[  171.767342]  pvr_fw_trace_mask_set+0x78/0x154 [powervr] (P)\n[  171.772984]  simple_attr_write_xsigned.isra.0+0xe0/0x19c\n[  171.778341]  simple_attr_write+0x18/0x24\n[  171.782296]  debugfs_attr_write+0x50/0x98\n[  171.786341]  full_proxy_write+0x6c/0xa8\n[  171.790208]  vfs_write+0xd4/0x350\n[  171.793561]  ksys_write+0x70/0x108\n[  171.796995]  __arm64_sys_write+0x1c/0x28\n[  171.800952]  invoke_syscall+0x48/0x10c\n[  171.804740]  el0_svc_common.constprop.0+0x40/0xe0\n[  171.809487]  do_el0_svc+0x1c/0x28\n[  171.812834]  el0_svc+0x34/0x108\n[  171.816013]  el0t_64_sync_handler+0xa0/0xe4\n[  171.820237]  el0t_64_sync+0x198/0x19c\n[  171.823939] Code: 32000262 b90ac293 1a931056 9134e293 (b9000036)\n[  171.830073] ---[ end trace 0000000000000000 ]---"
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\ndrm/imagination: Corrige el fallo de segmentación al actualizar la máscara de ftrace\n\nCorrige el acceso a datos no válido al pasar los datos correctos para la entrada de debugfs.\n\n[ 171.549793] No se puede manejar la desreferencia de puntero NULL del kernel en la dirección virtual 0000000000000000\n[ 171.559248] Información de aborto de memoria:\n[ 171.562173] ESR = 0x0000000096000044\n[ 171.566227] EC = 0x25: DABT (EL actual), IL = 32 bits\n[ 171.573108] SET = 0, FnV = 0\n[ 171.576448] EA = 0, S1PTW = 0\n[ 171.579745] FSC = 0x04: fallo de traducción de nivel 0\n[ 171.584760] Información de aborto de datos:\n[ 171.588012] ISV = 0, ISS = 0x00000044, ISS2 = 0x00000000\n[ 171.593734] CM = 0, WnR = 1, TnD = 0, TagAccess = 0\n[ 171.598962] GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0\n[ 171.604471] tabla de páginas de usuario: páginas de 4k, VAs de 48 bits, pgdp=0000000083837000\n[ 171.611358] [0000000000000000] pgd=0000000000000000, p4d=0000000000000000\n[ 171.618500] Error interno: Oops: 0000000096000044 [#1] SMP\n[ 171.624222] Módulos enlazados: powervr drm_shmem_helper drm_gpuvm...\n[ 171.656580] CPU: 0 UID: 0 PID: 549 Comm: bash No contaminado 7.0.0-rc2-g730b257ba723-dirty #13 PREEMPT\n[ 171.665773] Nombre del hardware: BeagleBoard.org BeaglePlay (DT)\n[ 171.671296] pstate: 20000005 (nzCv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--)\n[ 171.678306] pc : pvr_fw_trace_mask_set+0x78/0x154 [powervr]\n[ 171.683959] lr : pvr_fw_trace_mask_set+0x4c/0x154 [powervr]\n[ 171.689593] sp : ffff8000835ebb90\n[ 171.692929] x29: ffff8000835ebc00 x28: ffff000005c60f80 x27: 0000000000000000\n[ 171.700130] x26: 0000000000000000 x25: ffff00000504af28 x24: 0000000000000000\n[ 171.707324] x23: ffff00000504af50 x22: 0000000000000203 x21: 0000000000000000\n[ 171.714518] x20: ffff000005c44a80 x19: ffff000005c457b8 x18: 0000000000000000\n[ 171.721715] x17: 0000000000000000 x16: 0000000000000000 x15: 0000aaaae8887580\n[ 171.728908] x14: 0000000000000000 x13: 0000000000000000 x12: ffff8000835ebc30\n[ 171.736095] x11: ffff00000504af2a x10: ffff00008504af29 x9 : 0fffffffffffffff\n[ 171.743286] x8 : ffff8000835ebbf8 x7 : 0000000000000000 x6 : 000000000000002a\n[ 171.750479] x5 : ffff00000504af2e x4 : 0000000000000000 x3 : 0000000000000010\n[ 171.757674] x2 : 0000000000000203 x1 : 0000000000000000 x0 : ffff8000835ebba0\n[ 171.764871] Traza de llamada:\n[ 171.767342] pvr_fw_trace_mask_set+0x78/0x154 [powervr] (P)\n[ 171.772984] simple_attr_write_xsigned.isra.0+0xe0/0x19c\n[ 171.778341] simple_attr_write+0x18/0x24\n[ 171.782296] debugfs_attr_write+0x50/0x98\n[ 171.786341] full_proxy_write+0x6c/0xa8\n[ 171.790208] vfs_write+0xd4/0x350\n[ 171.793561] ksys_write+0x70/0x108\n[ 171.796995] __arm64_sys_write+0x1c/0x28\n[ 171.800952] invoke_syscall+0x48/0x10c\n[ 171.804740] el0_svc_common.constprop.0+0x40/0xe0\n[ 171.809487] do_el0_svc+0x1c/0x28\n[ 171.812834] el0_svc+0x34/0x108\n[ 171.816013] el0t_64_sync_handler+0xa0/0xe4\n[ 171.820237] el0t_64_sync+0x198/0x19c\n[ 171.823939] Código: 32000262 b90ac293 1a931056 9134e293 (b9000036)\n[ 171.830073] ---[ fin de la traza 0000000000000000 ]---"
    }
  ],
  "lastModified": "2026-07-23T08:10:00.137",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "37C6A06A-578A-467F-8EE4-E50B9A46C871",
              "versionEndExcluding": "7.0.4",
              "versionStartIncluding": "7.0"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "B1EF7059-E670-45F4-B422-54C40FA86390"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}