{
  "affected": [
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:12",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:13",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:14",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "details": "In the Linux kernel, the following vulnerability has been resolved:  i2c: core: fix debugfs UAF on adapter removal  i2c_del_adapter() frees the adapter's debugfs directory before it unregisters the adapter device, but the new_device sysfs attribute stays writable until device_del(). A write racing with removal still reaches i2c_device_probe(), which passes the freed adap-\u003edebugfs to debugfs_create_dir() as the new client's parent:    BUG: KASAN: slab-use-after-free in lookup_noperm_common+0x407/0x430   Read of size 4 at addr ffff88803ef87810 by task syz.0.61/6090    lookup_noperm_common+0x407/0x430    simple_start_creating+0x9c/0x110    debugfs_start_creating+0xdb/0x1a0    debugfs_create_dir+0x24/0x350    i2c_device_probe+0x814/0xbf0  It's technically possible to create a client after i2c_deregister_clients has run. That client will never be unregistered and make wait_for_completion hang.  Close the window by removing the new_device attribute at the start of i2c_del_adapter(). device_remove_file() will drain any clients left.",
  "id": "DEBIAN-CVE-2026-89983",
  "modified": "2026-09-17T04:47:33.945740777Z",
  "published": "2026-09-16T11:17:09.270Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://security-tracker.debian.org/tracker/CVE-2026-89983"
    }
  ],
  "upstream": [
    "CVE-2026-89983"
  ]
}