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CVE-2025-40034

Estado: AplazadaSin puntuar—

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

PCI/AER: Avoid NULL pointer dereference in aer_ratelimit()

When platform firmware supplies error information to the OS, e.g., via the ACPI APEI GHES mechanism, it may identify an error source device that doesn't advertise an AER Capability and therefore dev->aer_info, which contains AER stats and ratelimiting data, is NULL.

pci_dev_aer_stats_incr() already checks dev->aer_info for NULL, but aer_ratelimit() did not, leading to NULL pointer dereferences like this one from the URL below:

[8086:2020] is an Intel "Sky Lake-E DMI3 Registers" device that claims to be a Root Port but does not advertise an AER Capability.

Leer descripción completaMostrar menos

Add a NULL check in aer_ratelimit() to avoid the NULL pointer dereference. Note that this also prevents ratelimiting these events from GHES.

[bhelgaas: add crash details to commit log]

Detalles técnicos trazas, registros y código del informe original
  {1}[Hardware Error]: Hardware error from APEI Generic Hardware Error Source: 0
  {1}[Hardware Error]: event severity: corrected
  {1}[Hardware Error]:   device_id: 0000:00:00.0
  {1}[Hardware Error]:   vendor_id: 0x8086, device_id: 0x2020
  {1}[Hardware Error]:   aer_cor_status: 0x00001000, aer_cor_mask: 0x00002000
  BUG: kernel NULL pointer dereference, address: 0000000000000264
  RIP: 0010:___ratelimit+0xc/0x1b0
  pci_print_aer+0x141/0x360
  aer_recover_work_func+0xb5/0x130

CVSS

NVD no ha asignado puntuación CVSS a esta CVE (habitual desde el cambio de política de abril de 2026).

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)

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

Linux — Linux KernelAI

Referencias

JSON original (NVD)

Mostrar
{
  "id": "CVE-2025-40034",
  "cveTags": [],
  "metrics": {},
  "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": "a57f2bfb4a5863f83087867c0e671f2418212d23",
              "lessThan": "41683624cbff0a26bb7e0627f4a7e1b51a8779a8",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "a57f2bfb4a5863f83087867c0e671f2418212d23",
              "lessThan": "deb2f228388ff3a9d0623e3b59a053e9235c341d",
              "versionType": "git"
            }
          ],
          "programFiles": [
            "drivers/pci/pcie/aer.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.16"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "6.16",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "6.17.3",
              "versionType": "semver",
              "lessThanOrEqual": "6.17.*"
            },
            {
              "status": "unaffected",
              "version": "6.18",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "drivers/pci/pcie/aer.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2025-10-28T12:15:37.250",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/41683624cbff0a26bb7e0627f4a7e1b51a8779a8",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/deb2f228388ff3a9d0623e3b59a053e9235c341d",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Deferred",
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nPCI/AER: Avoid NULL pointer dereference in aer_ratelimit()\n\nWhen platform firmware supplies error information to the OS, e.g., via the\nACPI APEI GHES mechanism, it may identify an error source device that\ndoesn't advertise an AER Capability and therefore dev->aer_info, which\ncontains AER stats and ratelimiting data, is NULL.\n\npci_dev_aer_stats_incr() already checks dev->aer_info for NULL, but\naer_ratelimit() did not, leading to NULL pointer dereferences like this one\nfrom the URL below:\n\n  {1}[Hardware Error]: Hardware error from APEI Generic Hardware Error Source: 0\n  {1}[Hardware Error]: event severity: corrected\n  {1}[Hardware Error]:   device_id: 0000:00:00.0\n  {1}[Hardware Error]:   vendor_id: 0x8086, device_id: 0x2020\n  {1}[Hardware Error]:   aer_cor_status: 0x00001000, aer_cor_mask: 0x00002000\n  BUG: kernel NULL pointer dereference, address: 0000000000000264\n  RIP: 0010:___ratelimit+0xc/0x1b0\n  pci_print_aer+0x141/0x360\n  aer_recover_work_func+0xb5/0x130\n\n[8086:2020] is an Intel \"Sky Lake-E DMI3 Registers\" device that claims to\nbe a Root Port but does not advertise an AER Capability.\n\nAdd a NULL check in aer_ratelimit() to avoid the NULL pointer dereference.\nNote that this also prevents ratelimiting these events from GHES.\n\n[bhelgaas: add crash details to commit log]"
    }
  ],
  "lastModified": "2026-06-17T09:21:09.333",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}