{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "651fdda8406d42a5004c5c79f269540a85d6a1ab"
            },
            {
              "fixed": "e7f6a6b5741d16fdac7adaecbe0fa52ae756f208"
            },
            {
              "fixed": "f81808de37338aac8e167f99bfae647b1b835c70"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "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-2026-89745.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ndebugfs: Fix lockdown check for mmap_prepare\n\nCommit 651fdda8406d (\"relay: update relay to use mmap_prepare\")\nchanged the `mmap` file operation to `mmap_prepare` for relayfs, but\nthe lockdown check in debugfs was not updated accordingly.\n\nThis prevents debugfs from being locked down when the kernel is in\nintegrity mode if a file uses `mmap_prepare` but not `mmap`.\n\nSince the conversion to `mmap_prepare` across the kernel is not yet\ncomplete, update the lockdown check to look for both `mmap` and\n`mmap_prepare` to ensure comprehensive coverage.",
  "id": "CVE-2026-89745",
  "modified": "2026-09-13T03:31:00.722125185Z",
  "published": "2026-09-11T19:46:50.758Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e7f6a6b5741d16fdac7adaecbe0fa52ae756f208"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f81808de37338aac8e167f99bfae647b1b835c70"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89745.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-89745"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "debugfs: Fix lockdown check for mmap_prepare"
}