{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "1cce1eea0aff51201753fcaca421df825b0813b6"
            },
            {
              "fixed": "3ab58cf42c46bf2366d2f55ae5c59299d5e178b7"
            },
            {
              "fixed": "10edf7e0ffdc7faa18e2244b17722c1b882b8273"
            },
            {
              "fixed": "3ad9ccea1b25435f6179b57aa891960beb7ce8f9"
            },
            {
              "fixed": "8bcc1cd237ab5ccfdd102869fa031c541943cf40"
            },
            {
              "fixed": "73ddc8518a32baff6bc17afda4ee1ebae5b4ed12"
            },
            {
              "fixed": "fdaa42ca370d056428e5e171247c8fdce8dff36a"
            },
            {
              "fixed": "9e48844f708eb48bae4e79cb21edc097c966306d"
            },
            {
              "fixed": "6a320935fa4293e9e599ec9f85dc9eb3be7029f8"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "4.11.0"
            },
            {
              "fixed": "5.10.258"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.11.0"
            },
            {
              "fixed": "5.15.209"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.16.0"
            },
            {
              "fixed": "6.1.175"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.6.140"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.86"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.27"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.0.4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/46xxx/CVE-2026-46040.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ninotify: fix watch count leak when fsnotify_add_inode_mark_locked() fails\n\nWhen fsnotify_add_inode_mark_locked() fails in inotify_new_watch(),\nthe error path calls inotify_remove_from_idr() but does not call\ndec_inotify_watches() to undo the preceding inc_inotify_watches().\nThis leaks a watch count, and repeated failures can exhaust the\nmax_user_watches limit with -ENOSPC even when no watches are active.\n\nPrior to commit 1cce1eea0aff (\"inotify: Convert to using per-namespace\nlimits\"), the watch count was incremented after fsnotify_add_mark_locked()\nsucceeded, so this path was not affected. The conversion moved\ninc_inotify_watches() before the mark insertion without adding the\ncorresponding rollback.\n\nAdd the missing dec_inotify_watches() call in the error path.",
  "id": "CVE-2026-46040",
  "modified": "2026-07-15T01:49:19.509162143Z",
  "published": "2026-05-27T12:56:52.161Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/10edf7e0ffdc7faa18e2244b17722c1b882b8273"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3ab58cf42c46bf2366d2f55ae5c59299d5e178b7"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3ad9ccea1b25435f6179b57aa891960beb7ce8f9"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6a320935fa4293e9e599ec9f85dc9eb3be7029f8"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/73ddc8518a32baff6bc17afda4ee1ebae5b4ed12"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8bcc1cd237ab5ccfdd102869fa031c541943cf40"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9e48844f708eb48bae4e79cb21edc097c966306d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/fdaa42ca370d056428e5e171247c8fdce8dff36a"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/46xxx/CVE-2026-46040.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-46040"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.8.0",
  "summary": "inotify: fix watch count leak when fsnotify_add_inode_mark_locked() fails"
}