{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "a4dd8535a527061a01f2fd335596fa77ca240a96"
            },
            {
              "fixed": "cf8e14db93eaecc4c0c58299be3b3183b0e53ed5"
            },
            {
              "fixed": "c09c2e236eef6f59e105f38a30f5439e6ccbcad7"
            },
            {
              "fixed": "c12584cd6078085d707266be864e7e1cc91d74e3"
            },
            {
              "fixed": "a0130d682222ae21afc395aead7cd2d87e1a8358"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "6.12.0"
            },
            {
              "fixed": "6.12.94"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.36"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.0.13"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53234.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: ibm: emac: Fix use-after-free during device removal\n\nThe driver was using devm_register_netdev() which causes unregister_netdev()\nto be deferred until the devres cleanup phase, which runs after emac_remove()\nreturns. This creates a use-after-free window where:\n\n1. emac_remove() is called, which tears down hardware (cancels work, detaches\n   modules, unregisters from MAL)\n2. emac_remove() returns\n3. devres cleanup runs and finally calls unregister_netdev()\n\nDuring step 3, the network stack might still process packets, triggering\nemac_irq(), emac_poll(), or other handlers that access now-freed hardware\nresources (dev-\u003eemacp, dev-\u003emal, etc.).\n\nFix this by replacing devm_register_netdev() with manual register_netdev()\nand calling unregister_netdev() at the beginning of emac_remove(), before\nany hardware teardown. This ensures the network device is fully stopped and\nunregistered before hardware resources are released.\n\nThe change is safe because:\n- dev-\u003endev is assigned very early in probe (before any error paths that\n  could bypass emac_remove)\n- platform_set_drvdata() is only called after successful registration, so\n  emac_remove() only runs for fully registered devices\n- unregister_netdev() is idempotent and safe to call on any registered device",
  "id": "CVE-2026-53234",
  "modified": "2026-07-10T03:53:55.571677362Z",
  "published": "2026-06-25T08:39:31.852Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a0130d682222ae21afc395aead7cd2d87e1a8358"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c09c2e236eef6f59e105f38a30f5439e6ccbcad7"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c12584cd6078085d707266be864e7e1cc91d74e3"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/cf8e14db93eaecc4c0c58299be3b3183b0e53ed5"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53234.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-53234"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.7.5",
  "summary": "net: ibm: emac: Fix use-after-free during device removal"
}