usbnet: Run unregister_netdev() before unbind() again

{
  "id": "7cd264d6453853a9b95d218b0c99f5d40f724124427e3a494eab49a72dc38f32",
  "url": "https://osv.dev/vulnerability/CVE-2022-49501",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "usbnet: Run unregister_netdev() before unbind() again",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: usbnet: Run unregister_netdev() before unbind() again Commit 2c9d6c2b871d (\"usbnet: run unbind() before unregister_netdev()\") sought to fix a use-after-free on disconnect of USB Ethernet adapters. It turns out that a different fix is necessary to address the issue: https://lore.kernel.org/netdev/18b3541e5372bc9b9fc733d422f4e698c089077c.1650177997.git.lukas@wunner.de/ So the commit was not necessary. The commit made binding and unbinding of USB Ethernet asymmetrical: Before, usbnet_probe() first invoked the ->bind() callback and then register_netdev(). usbnet_disconnect() mirrored that by first invoking unregister_netdev() and then ->unbind(). Since the commit, the order in usbnet_disconnect() is reversed and no longer mirrors usbnet_probe(). One consequence is that a PHY disconnected (and stopped) in ->unbind() is afterwards stopped once more by unregister_netdev() as it closes the netdev before unregistering. That necessitates a contortion in ->stop() because the PHY may only be stopped if it hasn't already been disconnected. Reverting the commit allows making the call to phy_stop() unconditional in ->stop().",
    "evidence": "osv:CVE-2022-49501",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "5.15.46",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "5.17.14",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "5.18.3",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "high",
    "structured": {
      "id": "CVE-2022-49501",
      "aliases": [
        "CVE-2022-49501"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "2c9d6c2b871d5841ce26ede3e81fd37e2e33c42c"
                },
                {
                  "fixed": "6d5deb242874d924beccf7eb3cef04c1c3b0da79"
                },
                {
                  "fixed": "fbda837107f9bd4ec658d2aa88c6856dba606f06"
                },
                {
                  "fixed": "969a1b3ea3cb7d58a16fe12fd1b04bfc0ea40509"
                },
                {
                  "fixed": "d1408f6b4dd78fb1b9e26bcf64477984e5f85409"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-49501.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.14.0"
                },
                {
                  "fixed": "5.15.46"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.16.0"
                },
                {
                  "fixed": "5.17.14"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.18.0"
                },
                {
                  "fixed": "5.18.3"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-49501.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:31.375223433Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/6d5deb242874d924beccf7eb3cef04c1c3b0da79",
        "https://git.kernel.org/stable/c/969a1b3ea3cb7d58a16fe12fd1b04bfc0ea40509",
        "https://git.kernel.org/stable/c/d1408f6b4dd78fb1b9e26bcf64477984e5f85409",
        "https://git.kernel.org/stable/c/fbda837107f9bd4ec658d2aa88c6856dba606f06",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/49xxx/CVE-2022-49501.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2022-49501",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
      ],
      "provider_metadata": {
        "cna_assigner": "Linux",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/49xxx/CVE-2022-49501.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2022-49501",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 497878,
  "published_at": "2025-02-26T02:13:34.885+00:00"
}