netfs: Fix netfs_create_write_req() to handle async cache object creation

{
  "id": "b1f6e1b5db553b7b73d6c53be9bf5648fea5aa55dc3d388113ff0b340050401a",
  "url": "https://osv.dev/vulnerability/CVE-2026-72366",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "netfs: Fix netfs_create_write_req() to handle async cache object creation",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: netfs: Fix netfs_create_write_req() to handle async cache object creation netfs_create_write_req() will skip caching if the fscache cookie is disabled, but this is a problem because async cache object creation might not have got far enough yet that has been enabled - thereby causing the call to fscache_begin_write_operation() to be skipped. Fix this by removing the checks on the cookie and delegating this to fscache_begin_write_operation().",
    "evidence": "osv:CVE-2026-72366",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "6.12.114",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.18.40",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "7.1.5",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "critical",
    "structured": {
      "id": "CVE-2026-72366",
      "aliases": [
        "CVE-2026-72366"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
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                  "introduced": "7b589a9b45ae32aa9d7bece597490e141198d7a6"
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                  "fixed": "aee03fbc8803a40d65e20f1af816a7219048a426"
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                {
                  "fixed": "8ab75e445c161c4cb504aa98e20ce1dd1ecd8e9a"
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                {
                  "fixed": "1188a9846fadeacf9d1430b528e5217f749d665b"
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                {
                  "fixed": "dbd6f56d975b23241b7bbb11bb8f562af548a0aa"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-72366.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.11.0"
                },
                {
                  "fixed": "6.12.114"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.13.0"
                },
                {
                  "fixed": "6.18.40"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.19.0"
                },
                {
                  "fixed": "7.1.5"
                }
              ]
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          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-72366.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:31.946237806Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/1188a9846fadeacf9d1430b528e5217f749d665b",
        "https://git.kernel.org/stable/c/8ab75e445c161c4cb504aa98e20ce1dd1ecd8e9a",
        "https://git.kernel.org/stable/c/aee03fbc8803a40d65e20f1af816a7219048a426",
        "https://git.kernel.org/stable/c/dbd6f56d975b23241b7bbb11bb8f562af548a0aa",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/72xxx/CVE-2026-72366.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-72366",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
      ],
      "provider_metadata": {
        "cna_assigner": "Linux",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/72xxx/CVE-2026-72366.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-72366",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 499170,
  "published_at": "2026-08-15T05:56:04.016+00:00"
}