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CVE-2026-64509

Estado: RecibidaSin puntuar—

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

rust: block: fix GenDisk cleanup paths

GenDiskBuilder::build() still has fallible work after __blk_mq_alloc_disk(), but its error path only recovers the foreign queue data. That leaks the temporary gendisk and request_queue until later teardown. If the caller moved the last Arc<TagSet<T>> into build(), the leaked queue can retain blk-mq state after the tag set is dropped.

Fix the pre-registration failure path by dropping the temporary gendisk reference with put_disk() before recovering queue_data, so disk_release() can tear down the owned queue.

Leer descripción completaMostrar menos

Also pair GenDisk::drop() with put_disk() after del_gendisk(). Once a Rust GenDisk has been added with device_add_disk(), del_gendisk() only unregisters it; the final gendisk reference still has to be dropped to complete the release path.

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-2026-64509",
  "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": "3253aba3408aa4eb2e4e09365eede3e63ef7536b",
              "lessThan": "d1dcaa5229a63a6b6df7e0f673fe576cf3d6e8cb",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "3253aba3408aa4eb2e4e09365eede3e63ef7536b",
              "lessThan": "e7636f26f77070a529c26d65afd217514ce85ce4",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "3253aba3408aa4eb2e4e09365eede3e63ef7536b",
              "lessThan": "6822a2685b4da9a87efd1fce4b042678a31ff734",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "3253aba3408aa4eb2e4e09365eede3e63ef7536b",
              "lessThan": "2957771379fa335103a4b539db57bb2271e12142",
              "versionType": "git"
            }
          ],
          "programFiles": [
            "rust/kernel/block/mq/gen_disk.rs"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.11"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "6.11",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "6.12.97",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "status": "unaffected",
              "version": "6.18.39",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "status": "unaffected",
              "version": "7.1.4",
              "versionType": "semver",
              "lessThanOrEqual": "7.1.*"
            },
            {
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "rust/kernel/block/mq/gen_disk.rs"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2026-07-25T10:17:37.030",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/2957771379fa335103a4b539db57bb2271e12142",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/6822a2685b4da9a87efd1fce4b042678a31ff734",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/d1dcaa5229a63a6b6df7e0f673fe576cf3d6e8cb",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/e7636f26f77070a529c26d65afd217514ce85ce4",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Received",
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nrust: block: fix GenDisk cleanup paths\n\nGenDiskBuilder::build() still has fallible work after\n__blk_mq_alloc_disk(), but its error path only recovers the\nforeign queue data. That leaks the temporary gendisk and\nrequest_queue until later teardown. If the caller moved the last\nArc<TagSet<T>> into build(), the leaked queue can retain blk-mq\nstate after the tag set is dropped.\n\nFix the pre-registration failure path by dropping the temporary\ngendisk reference with put_disk() before recovering queue_data,\nso disk_release() can tear down the owned queue.\n\nAlso pair GenDisk::drop() with put_disk() after del_gendisk().\nOnce a Rust GenDisk has been added with device_add_disk(),\ndel_gendisk() only unregisters it; the final gendisk reference\nstill has to be dropped to complete the release path."
    }
  ],
  "lastModified": "2026-08-17T05:17:57.050",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}