CVE-2025-68781 (GCVE-0-2025-68781)

Vulnerability from cvelistv5 – Published: 2026-01-13 15:28 – Updated: 2026-01-13 15:28
VLAI?
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.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 0807c500a1a6d7fa20cbd7bbe7fea14a66112463 , < 4476c73bbbb09b13a962176fca934b32d3954a2e (git)
Affected: 0807c500a1a6d7fa20cbd7bbe7fea14a66112463 , < 319f7a85b3c4e34ac2fe083eb146fe129a556317 (git)
Affected: 0807c500a1a6d7fa20cbd7bbe7fea14a66112463 , < 69f9a0701abc3d1f8225074c56c27e6c16a37222 (git)
Affected: 0807c500a1a6d7fa20cbd7bbe7fea14a66112463 , < 2e7c47e2eb3cfeadf78a1ccbac8492c60d508f23 (git)
Affected: 0807c500a1a6d7fa20cbd7bbe7fea14a66112463 , < 41ca62e3e21e48c2903b3b45e232cf4f2ff7434f (git)
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    Linux Linux Affected: 3.0
Unaffected: 0 , < 3.0 (semver)
Unaffected: 6.1.160 , ≤ 6.1.* (semver)
Unaffected: 6.6.120 , ≤ 6.6.* (semver)
Unaffected: 6.12.64 , ≤ 6.12.* (semver)
Unaffected: 6.18.3 , ≤ 6.18.* (semver)
Unaffected: 6.19-rc3 , ≤ * (original_commit_for_fix)
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{
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      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/usb/phy/phy-fsl-usb.c"
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          ],
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          "vendor": "Linux",
          "versions": [
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              "status": "unaffected",
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              "versionType": "semver"
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            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.3",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.19-rc3",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
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                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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              "operator": "OR"
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nusb: phy: fsl-usb: Fix use-after-free in delayed work during device removal\n\nThe delayed work item otg_event is initialized in fsl_otg_conf() and\nscheduled under two conditions:\n1. When a host controller binds to the OTG controller.\n2. When the USB ID pin state changes (cable insertion/removal).\n\nA race condition occurs when the device is removed via fsl_otg_remove():\nthe fsl_otg instance may be freed while the delayed work is still pending\nor executing. This leads to use-after-free when the work function\nfsl_otg_event() accesses the already freed memory.\n\nThe problematic scenario:\n\n(detach thread)            | (delayed work)\nfsl_otg_remove()           |\n  kfree(fsl_otg_dev) //FREE| fsl_otg_event()\n                           |   og = container_of(...) //USE\n                           |   og-\u003e //USE\n\nFix this by calling disable_delayed_work_sync() in fsl_otg_remove()\nbefore deallocating the fsl_otg structure. This ensures the delayed work\nis properly canceled and completes execution prior to memory deallocation.\n\nThis bug was identified through static analysis."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-01-13T15:28:56.261Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/4476c73bbbb09b13a962176fca934b32d3954a2e"
        },
        {
          "url": "https://git.kernel.org/stable/c/319f7a85b3c4e34ac2fe083eb146fe129a556317"
        },
        {
          "url": "https://git.kernel.org/stable/c/69f9a0701abc3d1f8225074c56c27e6c16a37222"
        },
        {
          "url": "https://git.kernel.org/stable/c/2e7c47e2eb3cfeadf78a1ccbac8492c60d508f23"
        },
        {
          "url": "https://git.kernel.org/stable/c/41ca62e3e21e48c2903b3b45e232cf4f2ff7434f"
        }
      ],
      "title": "usb: phy: fsl-usb: Fix use-after-free in delayed work during device removal",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-68781",
    "datePublished": "2026-01-13T15:28:56.261Z",
    "dateReserved": "2025-12-24T10:30:51.036Z",
    "dateUpdated": "2026-01-13T15:28:56.261Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2025-68781\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-01-13T16:15:57.773\",\"lastModified\":\"2026-01-13T16:15:57.773\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nusb: phy: fsl-usb: Fix use-after-free in delayed work during device removal\\n\\nThe delayed work item otg_event is initialized in fsl_otg_conf() and\\nscheduled under two conditions:\\n1. When a host controller binds to the OTG controller.\\n2. When the USB ID pin state changes (cable insertion/removal).\\n\\nA race condition occurs when the device is removed via fsl_otg_remove():\\nthe fsl_otg instance may be freed while the delayed work is still pending\\nor executing. This leads to use-after-free when the work function\\nfsl_otg_event() accesses the already freed memory.\\n\\nThe problematic scenario:\\n\\n(detach thread)            | (delayed work)\\nfsl_otg_remove()           |\\n  kfree(fsl_otg_dev) //FREE| fsl_otg_event()\\n                           |   og = container_of(...) //USE\\n                           |   og-\u003e //USE\\n\\nFix this by calling disable_delayed_work_sync() in fsl_otg_remove()\\nbefore deallocating the fsl_otg structure. This ensures the delayed work\\nis properly canceled and completes execution prior to memory deallocation.\\n\\nThis bug was identified through static analysis.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/2e7c47e2eb3cfeadf78a1ccbac8492c60d508f23\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/319f7a85b3c4e34ac2fe083eb146fe129a556317\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/41ca62e3e21e48c2903b3b45e232cf4f2ff7434f\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/4476c73bbbb09b13a962176fca934b32d3954a2e\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/69f9a0701abc3d1f8225074c56c27e6c16a37222\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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