fuse-uring: Avoid use-after-free in fuse_uring_async_stop_queues

{
  "id": "5b0311083375eff3d6358eed05c264cfa5aadbbd0b8e5807c97a0cdcefb8c4f2",
  "url": "https://osv.dev/vulnerability/CVE-2026-64261",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "fuse-uring: Avoid use-after-free in fuse_uring_async_stop_queues",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: fuse-uring: Avoid use-after-free in fuse_uring_async_stop_queues fuse_uring_async_stop_queues() might run when the last reference on ring->queue_refs was already dropped. In order to avoid an early destruction a reference on struct fuse_conn is now taken before starting fuse_uring_async_stop_queues() and that reference is only released when that delayed work queue terminates.",
    "evidence": "osv:CVE-2026-64261",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "6.18.39",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "7.1.4",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-64261",
      "aliases": [
        "CVE-2026-64261"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:L/AC:L/PR:L/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": [
                {
                  "introduced": "4a9bfb9b6850fec0685447aed280533cf980de70"
                },
                {
                  "fixed": "23a356e0bd96c8d5fb3ddff069f692bf10cab5c1"
                },
                {
                  "fixed": "95d7f50aff2a5f71557263ff25b97b2951f32bf8"
                },
                {
                  "fixed": "d351da75066955144515cb2f9aa959f24a04287a"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-64261.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.14.0"
                },
                {
                  "fixed": "6.18.39"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.19.0"
                },
                {
                  "fixed": "7.1.4"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-64261.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:37.424862040Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/23a356e0bd96c8d5fb3ddff069f692bf10cab5c1",
        "https://git.kernel.org/stable/c/95d7f50aff2a5f71557263ff25b97b2951f32bf8",
        "https://git.kernel.org/stable/c/d351da75066955144515cb2f9aa959f24a04287a",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64261.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-64261",
        "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/2026/64xxx/CVE-2026-64261.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-64261",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 504622,
  "published_at": "2026-07-25T08:49:11.999+00:00"
}