{
  "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"
            },
            {
              "fixed": "6.12.111-1"
            }
          ],
          "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:  net: macb: fix NULL pointer dereference on unbind with fixed-link  When the device tree describes a fixed-link and has no \"mdio\" child node, macb_mii_init() returns early without allocating the MDIO bus, leaving bp-\u003emii_bus as NULL.  Two cleanup paths then dereference this NULL bus:  1. On driver unbind, macb_remove() unconditionally calls    mdiobus_unregister(bp-\u003emii_bus), which oopses:    Unable to handle kernel NULL pointer dereference at virtual address 00000000000004a8   pc : mdiobus_unregister+0x14/0xa4   lr : macb_remove+0x38/0xa4   Call trace:    mdiobus_unregister+0x14/0xa4 (P)    macb_remove+0x38/0xa4    platform_remove+0x20/0x30    device_release_driver_internal+0x1c8/0x224    unbind_store+0xb4/0xbc  2. On the probe error path in macb_probe(), reached when    macb_mii_init() has succeeded but a subsequent step fails, the    err_out_unregister_mdio label runs the same unconditional cleanup.  mdiobus_unregister() and mdiobus_free() do not guard against a NULL bus, so guard the calls in both macb_remove() and the probe error path.",
  "id": "DEBIAN-CVE-2026-98008",
  "modified": "2026-09-29T10:47:27.551738680Z",
  "published": "2026-09-25T11:17:29.080Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://security-tracker.debian.org/tracker/CVE-2026-98008"
    }
  ],
  "upstream": [
    "CVE-2026-98008"
  ]
}