usb: phy: fsl-usb: Fix use-after-free in delayed work during device removal

{
  "id": "4334023ac91c67487c011c488c56a89b04d8db7ce49ee200777ba4321d1db565",
  "url": "https://osv.dev/vulnerability/CVE-2025-68781",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "usb: phy: fsl-usb: Fix use-after-free in delayed work during device removal",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: usb: phy: fsl-usb: Fix use-after-free in delayed work during device removal The delayed work item otg_event is initialized in fsl_otg_conf() and scheduled under two conditions: 1. When a host controller binds to the OTG controller. 2. When the USB ID pin state changes (cable insertion/removal). A race condition occurs when the device is removed via fsl_otg_remove(): the fsl_otg instance may be freed while the delayed work is still pending or executing. This leads to use-after-free when the work function fsl_otg_event() accesses the already freed memory. The problematic scenario: (detach thread) | (delayed work) fsl_otg_remove() | kfree(fsl_otg_dev) //FREE| fsl_otg_event() | og = container_of(...) //USE | og-> //USE Fix this by calling disable_delayed_work_sync() in fsl_otg_remove() before deallocating the fsl_otg structure. This ensures the delayed work is properly canceled and completes execution prior to memory deallocation. This bug was identified through static analysis.",
    "evidence": "osv:CVE-2025-68781",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "6.12.64",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.18.3",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2025-68781",
      "aliases": [
        "CVE-2025-68781"
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0807c500a1a6d7fa20cbd7bbe7fea14a66112463"
                },
                {
                  "fixed": "69f9a0701abc3d1f8225074c56c27e6c16a37222"
                },
                {
                  "fixed": "2e7c47e2eb3cfeadf78a1ccbac8492c60d508f23"
                },
                {
                  "fixed": "41ca62e3e21e48c2903b3b45e232cf4f2ff7434f"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-68781.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "3.0.0"
                },
                {
                  "fixed": "6.12.64"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.13.0"
                },
                {
                  "fixed": "6.18.3"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-68781.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:41.279612760Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/2e7c47e2eb3cfeadf78a1ccbac8492c60d508f23",
        "https://git.kernel.org/stable/c/41ca62e3e21e48c2903b3b45e232cf4f2ff7434f",
        "https://git.kernel.org/stable/c/69f9a0701abc3d1f8225074c56c27e6c16a37222",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/68xxx/CVE-2025-68781.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2025-68781",
        "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/2025/68xxx/CVE-2025-68781.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2025-68781",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 509138,
  "published_at": "2026-01-13T15:28:56.261+00:00"
}