{
  "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:  s390/dasd: Guard sysfs discipline callbacks against unallocated private data  Several sysfs show/store handlers call a discipline callback that dereferences device-\u003eprivate, either directly or through the DASD_DEFINE_ATTR() macro. During dasd_generic_set_online() the discipline is assigned before check_device() allocates device-\u003eprivate, so an unprivileged read of one of these world-readable attributes in that window dereferences a NULL pointer and panics.  Guard the dereference inside each callback that actually touches device-\u003eprivate.",
  "id": "DEBIAN-CVE-2026-89457",
  "modified": "2026-09-15T08:47:41.557819663Z",
  "published": "2026-09-11T20:19:26.527Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://security-tracker.debian.org/tracker/CVE-2026-89457"
    }
  ],
  "upstream": [
    "CVE-2026-89457"
  ]
}