CVE-2026-72487

Estado: RecibidaAlta (7.7)—

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

PCI: Check ROM header and data structure addr before accessing

We meet a crash when running stress-ng on x86_64 machine:

Our analysis reveals that the ROM space's start address is 0xffa0000007f30000, and size is 0x10000. Because of broken ROM space, before calling readl(pds), the pds's value is 0xffa0000007f3ffff, which is already pointed to the ROM space end, invoking readl() would read 4 bytes therefore cause an out-of-bounds access and trigger a crash. Fix this by adding image header and data structure checking.

We also found another crash on arm64 machine:

Leer descripción completaMostrar menos

The call trace is the same with x86_64, but the crash reason is that the data structure addr is not aligned with 4, and arm64 machine report "alignment fault". Fix this by adding alignment checking.

[bhelgaas: shorten function names, wrap comments]

Detalles técnicos trazas, registros y código del informe original

  BUG: unable to handle page fault for address: ffa0000007f40000
  RIP: 0010:pci_get_rom_size+0x52/0x220
  Call Trace:
  <TASK>
    pci_map_rom+0x80/0x130
    pci_read_rom+0x4b/0xe0
    kernfs_file_read_iter+0x96/0x180
    vfs_read+0x1b1/0x300

  Unable to handle kernel paging request at virtual address ffff8000dd1393ff
  Mem abort info:
  ESR = 0x0000000096000021
  EC = 0x25: DABT (current EL), IL = 32 bits
  SET = 0, FnV = 0
  EA = 0, S1PTW = 0
  FSC = 0x21: alignment fault

CVSS

Versión: 3.1
Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
Puntuación base: 7.7

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 principalT1499.004 Application or System Exploitationimpact75 %
Impacto secundarioT1561.002 Disk Structure Wipeimpact60 %

Vulnerabilidad local de kernel Linux que causa crash por acceso a memoria desalineada/fuera de límites (AV:L, PR:N, UI:N). Impacto: DoS por disponibilidad del sistema y potencial corrupción de datos del kernel.

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 Filter Network Traffic Execution Prevention Application Isolation and Sandboxing Exploit Protection Update Software

Tecnologías afectadas (1)

⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.

Linux — Linux Kernel^AI

Referencias

JSON original (NVD)

Mostrar

{
  "id": "CVE-2026-72487",
  "cveTags": [],
  "metrics": {
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 7.7,
          "attackVector": "LOCAL",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.2,
        "exploitabilityScore": 2.5
      }
    ]
  },
  "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": "47b975d234eac39f3a72e5496d5f6158d8b806d1",
              "lessThan": "cd5b242d5848369b9e957340a7e30adee7b6763d",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "47b975d234eac39f3a72e5496d5f6158d8b806d1",
              "lessThan": "4997873e3abbad47a9e1e4abd05f045f77a74f22",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "47b975d234eac39f3a72e5496d5f6158d8b806d1",
              "lessThan": "724042f8f98d2594b9d164549fd4292c6bd58120",
              "versionType": "git"
            },
            {
              "status": "affected",
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              "versionType": "git"
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            {
              "status": "affected",
              "version": "47b975d234eac39f3a72e5496d5f6158d8b806d1",
              "lessThan": "721ad5b72448b5065ed309017ab563205f162404",
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            },
            {
              "status": "affected",
              "version": "47b975d234eac39f3a72e5496d5f6158d8b806d1",
              "lessThan": "538796b807fcfb81b2ce40cc97a614fd8588feb5",
              "versionType": "git"
            }
          ],
          "programFiles": [
            "drivers/pci/rom.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.5"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "4.5",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "6.1.178",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "status": "unaffected",
              "version": "6.6.145",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "status": "unaffected",
              "version": "6.12.97",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "status": "unaffected",
              "version": "6.18.40",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "status": "unaffected",
              "version": "7.1.5",
              "versionType": "semver",
              "lessThanOrEqual": "7.1.*"
            },
            {
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "drivers/pci/rom.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2026-08-15T06:22:22.973",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/1d495446ec7ace5b61da366ffb161ee8319dd9a2",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/4997873e3abbad47a9e1e4abd05f045f77a74f22",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/538796b807fcfb81b2ce40cc97a614fd8588feb5",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/721ad5b72448b5065ed309017ab563205f162404",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/724042f8f98d2594b9d164549fd4292c6bd58120",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/cd5b242d5848369b9e957340a7e30adee7b6763d",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Received",
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nPCI: Check ROM header and data structure addr before accessing\n\nWe meet a crash when running stress-ng on x86_64 machine:\n\n  BUG: unable to handle page fault for address: ffa0000007f40000\n  RIP: 0010:pci_get_rom_size+0x52/0x220\n  Call Trace:\n  <TASK>\n    pci_map_rom+0x80/0x130\n    pci_read_rom+0x4b/0xe0\n    kernfs_file_read_iter+0x96/0x180\n    vfs_read+0x1b1/0x300\n\nOur analysis reveals that the ROM space's start address is\n0xffa0000007f30000, and size is 0x10000. Because of broken ROM space,\nbefore calling readl(pds), the pds's value is 0xffa0000007f3ffff, which is\nalready pointed to the ROM space end, invoking readl() would read 4 bytes\ntherefore cause an out-of-bounds access and trigger a crash.  Fix this by\nadding image header and data structure checking.\n\nWe also found another crash on arm64 machine:\n\n  Unable to handle kernel paging request at virtual address ffff8000dd1393ff\n  Mem abort info:\n  ESR = 0x0000000096000021\n  EC = 0x25: DABT (current EL), IL = 32 bits\n  SET = 0, FnV = 0\n  EA = 0, S1PTW = 0\n  FSC = 0x21: alignment fault\n\nThe call trace is the same with x86_64, but the crash reason is that the\ndata structure addr is not aligned with 4, and arm64 machine report\n\"alignment fault\". Fix this by adding alignment checking.\n\n[bhelgaas: shorten function names, wrap comments]"
    }
  ],
  "lastModified": "2026-08-17T06:19:16.913",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}