{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "27b77ea5feaa8fcf385ea99ce757982b0ac9d1f0"
            },
            {
              "fixed": "436189ee4bb2c7c993b945d68570dd38c3e4349e"
            },
            {
              "fixed": "50a66a63d1c841ae6b28a4551f642c1bba4c9529"
            },
            {
              "fixed": "0dbcdf4473a614adbd732d567c9b39ac0e040e0c"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "6.17.0"
            },
            {
              "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-2026-89447.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\niommufd: Avoid locking internal accesses during unmap\n\niommufd_access_notify_unmap() skips internal accesses because they do\nnot have an external unmap callback to invoke.\n\nHowever, the current test calls iommufd_lock_obj() before checking\nwhether the access is internal. If iommufd_lock_obj() succeeds, the loop\nthen sees the internal access and continues, bypassing the matching\niommufd_put_object() used by the normal unmap path. This leaks the\nobject reference taken by iommufd_lock_obj().\n\nCheck for internal accesses first so skipped entries are never locked.",
  "id": "CVE-2026-89447",
  "modified": "2026-09-13T03:30:40.580795484Z",
  "published": "2026-09-11T19:43:14.094Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0dbcdf4473a614adbd732d567c9b39ac0e040e0c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/436189ee4bb2c7c993b945d68570dd38c3e4349e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/50a66a63d1c841ae6b28a4551f642c1bba4c9529"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89447.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-89447"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "iommufd: Avoid locking internal accesses during unmap"
}