{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "bee330f3d67273a68dcb99f59480d59553c008b2"
            },
            {
              "fixed": "26d9162213952927cd59c0d94b7e0e992b347bec"
            },
            {
              "fixed": "24d28d15c0f7f7d4a1c229f8730314f0f8758810"
            },
            {
              "fixed": "6729990df9e70623bf53f855b521ae71ca9cb278"
            },
            {
              "fixed": "a0a7e2e177f2f18b9e7318a4c64ac44efd9ef22c"
            },
            {
              "fixed": "19dbfe4d586aecfed121cb3fa62281761d9d341f"
            },
            {
              "fixed": "79d09cfe90304ff4f195e47d569800f5e0f8b854"
            },
            {
              "fixed": "2d1215a72159d00001e08dee162e27718934bee9"
            },
            {
              "fixed": "eb197f7d60f00d0f5b1b3505dfc86a7e36045a3e"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "4.18.0"
            },
            {
              "fixed": "5.10.270"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.11.0"
            },
            {
              "fixed": "5.15.221"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.16.0"
            },
            {
              "fixed": "6.1.188"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.6.157"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.110"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.51"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.2.5"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89823.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm: fix race between partial drm_dev_register() failure and ioctl\n\nIf drm_dev_register() fails after registering a minor (e.g. render minor\nregistered, primary minor fails), userspace could have opened the first\nminor and entered a drm_dev_enter() critical section. Since the\nunplugged flag was never set, the ioctl proceeds while the error path\ntears down device resources.\n\nFix this by introducing drm_dev_synchronize_unplug(), which sets the\nunplugged flag and waits for the SRCU barrier, ensuring all in-flight\ndrm_dev_enter() critical sections complete before cleanup proceeds; call\nit on the error path of drm_dev_register().",
  "id": "CVE-2026-89823",
  "modified": "2026-09-18T03:30:25.085385996Z",
  "published": "2026-09-16T10:30:55.534Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/19dbfe4d586aecfed121cb3fa62281761d9d341f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/24d28d15c0f7f7d4a1c229f8730314f0f8758810"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/26d9162213952927cd59c0d94b7e0e992b347bec"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2d1215a72159d00001e08dee162e27718934bee9"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6729990df9e70623bf53f855b521ae71ca9cb278"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/79d09cfe90304ff4f195e47d569800f5e0f8b854"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a0a7e2e177f2f18b9e7318a4c64ac44efd9ef22c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/eb197f7d60f00d0f5b1b3505dfc86a7e36045a3e"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89823.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-89823"
    },
    {
      "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": "drm: fix race between partial drm_dev_register() failure and ioctl"
}