{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "24fe962c86f55347385933a1b06ca71b60854690"
            },
            {
              "fixed": "a1bb359c443d048fe5dfd6ca9caf4e3897f3e9aa"
            },
            {
              "fixed": "42df916e5a5f8fb4b60c8cefb54318d1ec02c580"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "6.14.0"
            },
            {
              "fixed": "7.2.3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/80xxx/CVE-2026-80858.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nfuse: publish io-uring queues with release semantics\n\nfuse_uring_create_queue() initializes a fuse_ring_queue and then\npublishes the pointer into ring-\u003equeues[qid] with WRITE_ONCE() under the\nfch-\u003elock. There are several readers that may concurrently be fetching\nthat pointer locklessly and then deferencing it.\n\nWRITE_ONCE() doesn't ensure ordering of the queue's field\ninitialization before the ring-\u003equeues[qid] pointer assignment. The\nqueue must be published with smp_store_release() so the field\ninitialization is guaranteed to happen before.\n\nReaders in paths where the read may happen concurrently with the store\nneed to use READ_ONCE() because any race involving a plain access is\nundefined.",
  "id": "CVE-2026-80858",
  "modified": "2026-09-06T03:30:28.867732052Z",
  "published": "2026-09-04T15:55:12.442Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/42df916e5a5f8fb4b60c8cefb54318d1ec02c580"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a1bb359c443d048fe5dfd6ca9caf4e3897f3e9aa"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/80xxx/CVE-2026-80858.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-80858"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "fuse: publish io-uring queues with release semantics"
}