{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "c5c707f96fc9a6e5a57ca5baac892673270abe3d"
            },
            {
              "fixed": "d788ef40a7517d22c97ab01700e4ae4c611b6f2f"
            },
            {
              "fixed": "2e0a5d6d62600b8c614d1b55e50ef94035d6adf9"
            },
            {
              "fixed": "7bbb7ce74051c8be4b69ff44ce3db370600dae61"
            },
            {
              "fixed": "48a586e382e4db1dbf958d44b63e081df5f8ed04"
            },
            {
              "fixed": "d369e5edfaaf83a448016e2f1da392b2174be801"
            },
            {
              "fixed": "8dee7c278f1c2b5bb80e17a6281c3812fc8b0cdd"
            },
            {
              "fixed": "83c2b7797742339bb768f83935f7ca33950db138"
            },
            {
              "fixed": "30d55c8aabb261bc3f427d6b9aae7ef6206063f9"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "4.0.0"
            },
            {
              "fixed": "5.10.261"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.11.0"
            },
            {
              "fixed": "5.15.212"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.16.0"
            },
            {
              "fixed": "6.1.178"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.6.145"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.96"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.39"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.1.3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53399.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnfsd: release layout stid on setlease failure\n\nnfs4_alloc_stid() publishes the new stid into cl-\u003ecl_stateids via\nidr_alloc_cyclic() under cl_lock before returning to\nnfsd4_alloc_layout_stateid(). When nfsd4_layout_setlease() then\nfails, the error path frees the layout stateid directly with\nkmem_cache_free() without ever calling idr_remove(), leaving the\nIDR slot pointing at freed slab memory. Any subsequent IDR walker\n(states_show, client teardown) dereferences the dangling pointer.\n\nThe correct teardown for an IDR-published stid is nfs4_put_stid(),\nwhich removes the IDR slot under cl_lock, dispatches sc_free\n(nfsd4_free_layout_stateid) to release ls-\u003els_file via\nnfsd4_close_layout(), and drops the nfs4_file reference in its\ntail.\n\nA second issue blocks that switch: nfsd4_free_layout_stateid()\nunconditionally inspects ls-\u003els_fence_work via\ndelayed_work_pending() under ls_lock, but\nINIT_DELAYED_WORK(\u0026ls-\u003els_fence_work, ...) currently runs only\nafter the setlease call. On the setlease-failure path the\ndestructor would touch an uninitialized delayed_work.\n\n    nfsd4_alloc_layout_stateid()\n      nfs4_alloc_stid()           /* idr_alloc_cyclic under cl_lock */\n      nfsd4_layout_setlease()     /* fails */\n        nfs4_put_stid()\n          nfsd4_free_layout_stateid()\n            delayed_work_pending(\u0026ls-\u003els_fence_work)  /* needs INIT */\n            nfsd4_close_layout()  /* nfsd_file_put(ls-\u003els_file) */\n          put_nfs4_file()\n\nFix by hoisting the ls_fenced / ls_fence_delay / INIT_DELAYED_WORK\ninitialization above the nfsd4_layout_setlease() call, and replace\nthe manual nfsd_file_put + put_nfs4_file + kmem_cache_free cleanup\nwith a single nfs4_put_stid(stp).",
  "id": "CVE-2026-53399",
  "modified": "2026-07-25T03:56:20.853380124Z",
  "published": "2026-07-19T12:02:00.055Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2e0a5d6d62600b8c614d1b55e50ef94035d6adf9"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/30d55c8aabb261bc3f427d6b9aae7ef6206063f9"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/48a586e382e4db1dbf958d44b63e081df5f8ed04"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7bbb7ce74051c8be4b69ff44ce3db370600dae61"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/83c2b7797742339bb768f83935f7ca33950db138"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8dee7c278f1c2b5bb80e17a6281c3812fc8b0cdd"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d369e5edfaaf83a448016e2f1da392b2174be801"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d788ef40a7517d22c97ab01700e4ae4c611b6f2f"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53399.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-53399"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.8.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "nfsd: release layout stid on setlease failure"
}