fs/writeback: skip AS_NO_DATA_INTEGRITY mappings in wait_sb_inodes()

{
  "id": "e3e04a3661d146fa5cb666f7024b8eaea8ca447f6d124d270569f46bd8a6b251",
  "url": "https://osv.dev/vulnerability/CVE-2026-23109",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "fs/writeback: skip AS_NO_DATA_INTEGRITY mappings in wait_sb_inodes()",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: fs/writeback: skip AS_NO_DATA_INTEGRITY mappings in wait_sb_inodes() Above the while() loop in wait_sb_inodes(), we document that we must wait for all pages under writeback for data integrity. Consequently, if a mapping, like fuse, traditionally does not have data integrity semantics, there is no need to wait at all; we can simply skip these inodes. This restores fuse back to prior behavior where syncs are no-ops. This fixes a user regression where if a system is running a faulty fuse server that does not reply to issued write requests, this causes wait_sb_inodes() to wait forever.",
    "evidence": "osv:CVE-2026-23109",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "6.18.8",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2026-23109",
      "aliases": [
        "CVE-2026-23109"
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0c58a97f919c24fe4245015f4375a39ff05665b6"
                },
                {
                  "fixed": "3f4ed5e2b8f111553562507ad6202432c7c57731"
                },
                {
                  "fixed": "f9a49aa302a05e91ca01f69031cb79a0ea33031f"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-23109.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.16.0"
                },
                {
                  "fixed": "6.18.8"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-23109.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:49.059849149Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/3f4ed5e2b8f111553562507ad6202432c7c57731",
        "https://git.kernel.org/stable/c/f9a49aa302a05e91ca01f69031cb79a0ea33031f",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/23xxx/CVE-2026-23109.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-23109",
        "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/2026/23xxx/CVE-2026-23109.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-23109",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 517290,
  "published_at": "2026-02-04T16:08:29.468+00:00"
}