{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "b9873755a6c8ccfce79094c4dce9efa3ecb1a749"
            },
            {
              "fixed": "1996639f824ce9468395cdb7bcb8f467fa787e77"
            },
            {
              "fixed": "1da310b94504d42001e9c32c43c5dc105b777e5f"
            },
            {
              "fixed": "9e9a82d00c3d10129fc310a7547b24a679d5d920"
            },
            {
              "fixed": "3b231f1e9990f4c21220d0a69733ce2105891ff9"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "6.8.0"
            },
            {
              "fixed": "6.12.101"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.42"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.1.6"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/68xxx/CVE-2026-68178.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nmisc: nsm: pin the module while the device is open\n\nmisc_open() installs a misc driver's file operations with fops_get(),\nwhich pins file_operations::owner before replacing the file's f_op.  The\nNSM misc device leaves nsm_dev_fops.owner unset, so opening /dev/nsm does\nnot take a module reference on the nsm driver.\n\nIf the driver is built as a module, an open file descriptor can therefore\nsurvive rmmod of the module that provides its ioctl callbacks.  A later\nioctl through that descriptor can call into unloaded module text.\n\nSet nsm_dev_fops.owner to THIS_MODULE so the misc core holds the module\nwhile any /dev/nsm file descriptor is open, matching the lifetime\nexpectation for the installed file operations.",
  "id": "CVE-2026-68178",
  "modified": "2026-08-18T03:30:58.272257345Z",
  "published": "2026-08-10T11:59:49.344Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1996639f824ce9468395cdb7bcb8f467fa787e77"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1da310b94504d42001e9c32c43c5dc105b777e5f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3b231f1e9990f4c21220d0a69733ce2105891ff9"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9e9a82d00c3d10129fc310a7547b24a679d5d920"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/68xxx/CVE-2026-68178.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-68178"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "misc: nsm: pin the module while the device is open"
}