CVE-2025-40034

{
  "id": "CVE-2025-40034",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "published": "2025-10-28T12:15:37.250",
  "lastModified": "2026-10-19T21:10:00.160",
  "vulnStatus": "Deferred",
  "cveTags": [],
  "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]"
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nPCI/AER: Evitar la desreferencia de puntero NULL en aer_ratelimit()\n\nCuando el firmware de la plataforma suministra información de error al SO, por ejemplo, a través del mecanismo ACPI APEI GHES, puede identificar un dispositivo de origen de error que no anuncia una Capacidad AER y, por lo tanto, dev->aer_info, que contiene estadísticas AER y datos de limitación de velocidad, es NULL.\n\npci_dev_aer_stats_incr() ya comprueba dev->aer_info en busca de NULL, pero aer_ratelimit() no lo hacía, lo que lleva a desreferencias de puntero NULL como esta de la URL a continuación:\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] es un dispositivo Intel 'Sky Lake-E DMI3 Registers' que afirma ser un Puerto Raíz pero no anuncia una Capacidad AER.\n\nAñadir una comprobación de NULL en aer_ratelimit() para evitar la desreferencia de puntero NULL. Tenga en cuenta que esto también evita la limitación de velocidad de estos eventos de GHES.\n\n[bhelgaas: añadir detalles del fallo al registro de commit]"
    }
  ],
  "affected": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "affectedData": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "programFiles": [
            "drivers/pci/pcie/aer.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "versions": [
            {
              "version": "a57f2bfb4a5863f83087867c0e671f2418212d23",
              "lessThan": "41683624cbff0a26bb7e0627f4a7e1b51a8779a8",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "a57f2bfb4a5863f83087867c0e671f2418212d23",
              "lessThan": "deb2f228388ff3a9d0623e3b59a053e9235c341d",
              "versionType": "git",
              "status": "affected"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "programFiles": [
            "drivers/pci/pcie/aer.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "versions": [
            {
              "version": "6.16",
              "status": "affected"
            },
            {
              "version": "0",
              "lessThan": "6.16",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.17.3",
              "lessThanOrEqual": "6.17.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.18",
              "lessThanOrEqual": "*",
              "versionType": "original_commit_for_fix",
              "status": "unaffected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {},
  "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"
    }
  ]
}