usb: gadget: core: flush gadget workqueue after device removal

{
  "id": "6e5924f4e7965083174d9ceb366f89eb732c33425af4f5c69fe3040234d9f6fd",
  "url": "https://osv.dev/vulnerability/CVE-2025-21838",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "usb: gadget: core: flush gadget workqueue after device removal",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: usb: gadget: core: flush gadget workqueue after device removal device_del() can lead to new work being scheduled in gadget->work workqueue. This is observed, for example, with the dwc3 driver with the following call stack: device_del() gadget_unbind_driver() usb_gadget_disconnect_locked() dwc3_gadget_pullup() dwc3_gadget_soft_disconnect() usb_gadget_set_state() schedule_work(&gadget->work) Move flush_work() after device_del() to ensure the workqueue is cleaned up.",
    "evidence": "osv:CVE-2025-21838",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "6.1.130",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.6.80",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.12.16",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.13.4",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2025-21838",
      "aliases": [
        "CVE-2025-21838"
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "5702f75375aa9ecf8ad3431aef3fe6ce8c8dbd15"
                },
                {
                  "fixed": "e3bc1a9a67ce33a2e761e6e7b7c2afc6cb9b7266"
                },
                {
                  "fixed": "859cb45aefa6de823b2fa7f229fe6d9562c9f3b7"
                },
                {
                  "fixed": "f894448f3904d7ad66fecef8f01fe0172629e091"
                },
                {
                  "fixed": "97695b5a1b5467a4f91194db12160f56da445dfe"
                },
                {
                  "fixed": "399a45e5237ca14037120b1b895bd38a3b4492ea"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-21838.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "3.12.0"
                },
                {
                  "fixed": "6.1.130"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.2.0"
                },
                {
                  "fixed": "6.6.80"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.7.0"
                },
                {
                  "fixed": "6.12.16"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.13.0"
                },
                {
                  "fixed": "6.13.4"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-21838.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:39.515250028Z",
      "provider": "osv",
      "references": [
        "https://cert-portal.siemens.com/productcert/html/ssa-784472.html",
        "https://git.kernel.org/stable/c/399a45e5237ca14037120b1b895bd38a3b4492ea",
        "https://git.kernel.org/stable/c/859cb45aefa6de823b2fa7f229fe6d9562c9f3b7",
        "https://git.kernel.org/stable/c/97695b5a1b5467a4f91194db12160f56da445dfe",
        "https://git.kernel.org/stable/c/e3bc1a9a67ce33a2e761e6e7b7c2afc6cb9b7266",
        "https://git.kernel.org/stable/c/f894448f3904d7ad66fecef8f01fe0172629e091",
        "https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/21xxx/CVE-2025-21838.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2025-21838",
        "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/2025/21xxx/CVE-2025-21838.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2025-21838",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 506921,
  "published_at": "2025-03-07T09:09:57.515+00:00"
}