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CVE-2026-93073

Estado: RecibidaSin puntuar—

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

dax: read holder_ops once in dax_holder_notify_failure()

dax_holder_notify_failure() reads dax_dev->holder_ops twice without READ_ONCE() -- once for the NULL check and once for the indirect notify_failure() call. A concurrent fs_put_dax() can clear holder_ops between the two reads, so the check can observe a non-NULL pointer while the call dereferences NULL. (kill_dax() also clears holder_ops, but only after synchronize_srcu(), so it cannot race a reader that is inside dax_read_lock(); fs_put_dax() does no such synchronization.)

Leer descripción completaMostrar menos

Fetch holder_ops once into a local with READ_ONCE() so the NULL check and the indirect call observe the same value.

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-2026-93073",
  "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": "8012b866085523758780850087102421dbcce522",
              "lessThan": "1661b9bf78def01a8c96409569772d9b2592f4ba",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "8012b866085523758780850087102421dbcce522",
              "lessThan": "0a42180d5410c98829ee72d1d426fb7faf9e6873",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "8012b866085523758780850087102421dbcce522",
              "lessThan": "ee1251621d1c7cf3155c6704542cbb358d799968",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "8012b866085523758780850087102421dbcce522",
              "lessThan": "6a37acecc7c29136235cbc446a1b89e81414344b",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "8012b866085523758780850087102421dbcce522",
              "lessThan": "eb412f80311fc7ab6eb3203091a3fe59a5e9fd30",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "8012b866085523758780850087102421dbcce522",
              "lessThan": "7ae9d15bdcde0f2955ae13b6a95587f9e23b2359",
              "versionType": "git"
            }
          ],
          "programFiles": [
            "drivers/dax/super.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.0"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "6.0",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "6.1.188",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "status": "unaffected",
              "version": "6.6.157",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "status": "unaffected",
              "version": "6.12.110",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "status": "unaffected",
              "version": "6.18.52",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "status": "unaffected",
              "version": "7.2.6",
              "versionType": "semver",
              "lessThanOrEqual": "7.2.*"
            },
            {
              "status": "unaffected",
              "version": "7.3-rc1",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "drivers/dax/super.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2026-09-17T17:18:01.207",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/0a42180d5410c98829ee72d1d426fb7faf9e6873",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/1661b9bf78def01a8c96409569772d9b2592f4ba",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/6a37acecc7c29136235cbc446a1b89e81414344b",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/7ae9d15bdcde0f2955ae13b6a95587f9e23b2359",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/eb412f80311fc7ab6eb3203091a3fe59a5e9fd30",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/ee1251621d1c7cf3155c6704542cbb358d799968",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Received",
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndax: read holder_ops once in dax_holder_notify_failure()\n\ndax_holder_notify_failure() reads dax_dev->holder_ops twice without\nREAD_ONCE() -- once for the NULL check and once for the indirect\nnotify_failure() call. A concurrent fs_put_dax() can clear holder_ops\nbetween the two reads, so the check can observe a non-NULL pointer while\nthe call dereferences NULL. (kill_dax() also clears holder_ops, but only\nafter synchronize_srcu(), so it cannot race a reader that is inside\ndax_read_lock(); fs_put_dax() does no such synchronization.)\n\nFetch holder_ops once into a local with READ_ONCE() so the NULL check and\nthe indirect call observe the same value."
    }
  ],
  "lastModified": "2026-09-17T17:18:01.207",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}