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CVE-2026-98205

Estado: RecibidaSin puntuar—

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

Input: evdev - zero absinfo before partial copy in EVIOCSABS

The EVIOCSABS handler copies at most the user supplied ioctl size into an uninitialized on-stack struct input_absinfo:

The size comes from _IOC_SIZE() of the ioctl command and is therefore fully controlled by userspace. A short size leaves the trailing part of the structure holding whatever was on the kernel stack, and the whole structure is then stored into the device:

EVIOCGABS hands that back to userspace, disclosing the stale stack bytes. Only the resolution field is currently cleared, which covers the legacy struct layout but not an arbitrarily short size.

Leer descripción completaMostrar menos

Zero the structure before the copy so any part not supplied by the caller reads back as zero. The existing resolution fixup is kept, since it also handles a size that partially overlaps that field.

Detalles técnicos trazas, registros y código del informe original
	if (copy_from_user(&abs, p, min_t(size_t,
			size, sizeof(struct input_absinfo))))

	dev->absinfo[t] = abs;

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)

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{
  "id": "CVE-2026-98205",
  "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": "448cd1664a573e69f54bfd32f3bb7220212b6cf5",
              "lessThan": "c0aebb57b73c7d06ad21731099afe119b113c403",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "448cd1664a573e69f54bfd32f3bb7220212b6cf5",
              "lessThan": "89b6ffa4bc10c436fa9aecc73be105124cd58a35",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "448cd1664a573e69f54bfd32f3bb7220212b6cf5",
              "lessThan": "e834e134a32b6a5c600fa539bb49146f617743ab",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "448cd1664a573e69f54bfd32f3bb7220212b6cf5",
              "lessThan": "af5f7130cbf39e6e12336d0b7a5f6e76e4e1526b",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "448cd1664a573e69f54bfd32f3bb7220212b6cf5",
              "lessThan": "30b853a3d71f16bd0aa66b604bc37dd1254a19b3",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "448cd1664a573e69f54bfd32f3bb7220212b6cf5",
              "lessThan": "71e5619db11dd6429101bd967230d0321ec5ea26",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "448cd1664a573e69f54bfd32f3bb7220212b6cf5",
              "lessThan": "3dfe48d5307a1ba22c58231d04257737015569ca",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "448cd1664a573e69f54bfd32f3bb7220212b6cf5",
              "lessThan": "8b852965b8eaf910c314dc346967ed82c8d4f235",
              "versionType": "git"
            }
          ],
          "programFiles": [
            "drivers/input/evdev.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "2.6.36"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "2.6.36",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "5.10.271",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "status": "unaffected",
              "version": "5.15.222",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "status": "unaffected",
              "version": "6.1.189",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "status": "unaffected",
              "version": "6.6.158",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "status": "unaffected",
              "version": "6.12.112",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "status": "unaffected",
              "version": "6.18.54",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "status": "unaffected",
              "version": "7.2.8",
              "versionType": "semver",
              "lessThanOrEqual": "7.2.*"
            },
            {
              "status": "unaffected",
              "version": "7.3-rc4",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "drivers/input/evdev.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2026-10-06T09:18:06.547",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/30b853a3d71f16bd0aa66b604bc37dd1254a19b3",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/3dfe48d5307a1ba22c58231d04257737015569ca",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/71e5619db11dd6429101bd967230d0321ec5ea26",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/89b6ffa4bc10c436fa9aecc73be105124cd58a35",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/8b852965b8eaf910c314dc346967ed82c8d4f235",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/af5f7130cbf39e6e12336d0b7a5f6e76e4e1526b",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/c0aebb57b73c7d06ad21731099afe119b113c403",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/e834e134a32b6a5c600fa539bb49146f617743ab",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Received",
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nInput: evdev - zero absinfo before partial copy in EVIOCSABS\n\nThe EVIOCSABS handler copies at most the user supplied ioctl size into\nan uninitialized on-stack struct input_absinfo:\n\n\tif (copy_from_user(&abs, p, min_t(size_t,\n\t\t\tsize, sizeof(struct input_absinfo))))\n\nThe size comes from _IOC_SIZE() of the ioctl command and is therefore\nfully controlled by userspace. A short size leaves the trailing part of\nthe structure holding whatever was on the kernel stack, and the whole\nstructure is then stored into the device:\n\n\tdev->absinfo[t] = abs;\n\nEVIOCGABS hands that back to userspace, disclosing the stale stack\nbytes. Only the resolution field is currently cleared, which covers the\nlegacy struct layout but not an arbitrarily short size.\n\nZero the structure before the copy so any part not supplied by the\ncaller reads back as zero. The existing resolution fixup is kept, since\nit also handles a size that partially overlaps that field."
    }
  ],
  "lastModified": "2026-10-06T09:18:06.547",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}