{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2"
            },
            {
              "fixed": "07adfbb3de7529f58ca708a97ead7fa4fdb71056"
            },
            {
              "fixed": "d662f7fc04fde305a27f304b3cd19b614d366839"
            },
            {
              "fixed": "51af080ca4e553256c59a75a877b9b4fff828311"
            },
            {
              "fixed": "4c7fc129db061c7daab841c4f3c342d894832362"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "2.6.12"
            },
            {
              "fixed": "6.12.109"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.50"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.2.4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89484.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nlockd: fix NULL dereference on lockowner allocation failure\n\nnlmclnt_locks_init_private() installs NLM file lock operations even when\nnlmclnt_find_lockowner() fails to allocate a lockowner. nlmclnt_proc()\nthen returns -ENOMEM, but the VFS still tears down the partially\ninitialized file_lock and calls locks_release_private().\n\nThat invokes nlmclnt_locks_release_private(), which dereferences\nfl-\u003efl_u.nfs_fl.owner and crashes because the owner was never installed.\n\nClear fl_ops before attempting to initialize the NLM private state, and\ninstall the NLM lock operations only after a lockowner has been allocated\nsuccessfully.",
  "id": "CVE-2026-89484",
  "modified": "2026-09-13T03:30:34.967714836Z",
  "published": "2026-09-11T19:43:38.740Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/07adfbb3de7529f58ca708a97ead7fa4fdb71056"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4c7fc129db061c7daab841c4f3c342d894832362"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/51af080ca4e553256c59a75a877b9b4fff828311"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d662f7fc04fde305a27f304b3cd19b614d366839"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89484.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-89484"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "lockd: fix NULL dereference on lockowner allocation failure"
}