FKIE_CVE-2026-98766

Vulnerability from fkie_nvd - Published: 2026-10-18 16:17 - Updated: 2026-10-30 13:21
Severity
Summary
In the Linux kernel, the following vulnerability has been resolved: usb: gadget: aspeed-vhub: cancel wake work on device removal wake_work is armed from the gadget .wakeup callback to resume suspended downstream ports, and it is never cancelled in ast_vhub_remove(), so a work item queued before or during removal can run after devm has freed vhub and its ports, a use-after-free. Cancelling the work alone is not sufficient: usb_gadget_wakeup() takes no lock and the unbind path never clears wakeup_en, so a remote-wakeup request in flight on another CPU can re-arm the work after the cancel and before vhub is freed. ast_vhub_del_dev() already clears d->registered under vhub->lock before unregistering the gadget. Refuse the wakeup in ast_vhub_udc_wakeup() once d->registered is clear: the check and the schedule_work() are then atomic against the unbind, so a wakeup that passed before the flag was cleared is drained by the cancel_work_sync() after the del_dev loop, and one that arrives later returns without arming. Also move INIT_WORK() to the top of ast_vhub_probe(), since the probe error path reuses ast_vhub_remove() and would otherwise cancel a never-initialized work item. This issue was found by an in-house static analysis tool.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/0d39ac4f65f9357469518c70e42940e0d8b0e497
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/20388c8d1d74c203fec8194c45cd31afdfab934e
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/3aed0c86afa7877d08722233a8b15e8c1ff8bcb8
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/474e9e1852fb5ba0bfb26f123dd0cb361d0f4f4d
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/552f580a18787cfbd83d28d7d76d584c29f2c4c2
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/89b3fef8809ec1a9acf5f753eb89b9508d7e4466
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c81504dfd2d93e345c98e7a012c2f2e74ce5b6a1
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f343bfa3fc9f6255602d66f4a7dbe7ddef13ba41
Impacted products
Vendor Product Version
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{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/usb/gadget/udc/aspeed-vhub/core.c",
            "drivers/usb/gadget/udc/aspeed-vhub/dev.c",
            "drivers/usb/gadget/udc/aspeed-vhub/hub.c",
            "drivers/usb/gadget/udc/aspeed-vhub/vhub.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "89b3fef8809ec1a9acf5f753eb89b9508d7e4466",
              "status": "affected",
              "version": "7ecca2a4080cb6b1fa174adc588fce9e9014c43c",
              "versionType": "git"
            },
            {
              "lessThan": "3aed0c86afa7877d08722233a8b15e8c1ff8bcb8",
              "status": "affected",
              "version": "7ecca2a4080cb6b1fa174adc588fce9e9014c43c",
              "versionType": "git"
            },
            {
              "lessThan": "552f580a18787cfbd83d28d7d76d584c29f2c4c2",
              "status": "affected",
              "version": "7ecca2a4080cb6b1fa174adc588fce9e9014c43c",
              "versionType": "git"
            },
            {
              "lessThan": "0d39ac4f65f9357469518c70e42940e0d8b0e497",
              "status": "affected",
              "version": "7ecca2a4080cb6b1fa174adc588fce9e9014c43c",
              "versionType": "git"
            },
            {
              "lessThan": "f343bfa3fc9f6255602d66f4a7dbe7ddef13ba41",
              "status": "affected",
              "version": "7ecca2a4080cb6b1fa174adc588fce9e9014c43c",
              "versionType": "git"
            },
            {
              "lessThan": "474e9e1852fb5ba0bfb26f123dd0cb361d0f4f4d",
              "status": "affected",
              "version": "7ecca2a4080cb6b1fa174adc588fce9e9014c43c",
              "versionType": "git"
            },
            {
              "lessThan": "c81504dfd2d93e345c98e7a012c2f2e74ce5b6a1",
              "status": "affected",
              "version": "7ecca2a4080cb6b1fa174adc588fce9e9014c43c",
              "versionType": "git"
            },
            {
              "lessThan": "20388c8d1d74c203fec8194c45cd31afdfab934e",
              "status": "affected",
              "version": "7ecca2a4080cb6b1fa174adc588fce9e9014c43c",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/usb/gadget/udc/aspeed-vhub/core.c",
            "drivers/usb/gadget/udc/aspeed-vhub/dev.c",
            "drivers/usb/gadget/udc/aspeed-vhub/hub.c",
            "drivers/usb/gadget/udc/aspeed-vhub/vhub.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.18"
            },
            {
              "lessThan": "4.18",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.273",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.224",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.191",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.160",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.113",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.56",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.10",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nusb: gadget: aspeed-vhub: cancel wake work on device removal\n\nwake_work is armed from the gadget .wakeup callback to resume suspended\ndownstream ports, and it is never cancelled in ast_vhub_remove(), so a\nwork item queued before or during removal can run after devm has freed\nvhub and its ports, a use-after-free.\n\nCancelling the work alone is not sufficient: usb_gadget_wakeup() takes\nno lock and the unbind path never clears wakeup_en, so a remote-wakeup\nrequest in flight on another CPU can re-arm the work after the cancel\nand before vhub is freed.\n\nast_vhub_del_dev() already clears d-\u003eregistered under vhub-\u003elock before\nunregistering the gadget. Refuse the wakeup in ast_vhub_udc_wakeup()\nonce d-\u003eregistered is clear: the check and the schedule_work() are then\natomic against the unbind, so a wakeup that passed before the flag was\ncleared is drained by the cancel_work_sync() after the del_dev loop,\nand one that arrives later returns without arming. Also move INIT_WORK()\nto the top of ast_vhub_probe(), since the probe error path reuses\nast_vhub_remove() and would otherwise cancel a never-initialized work\nitem.\n\nThis issue was found by an in-house static analysis tool."
    }
  ],
  "id": "CVE-2026-98766",
  "lastModified": "2026-10-30T13:21:26.200",
  "metrics": {},
  "published": "2026-10-18T16:17:30.440",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/0d39ac4f65f9357469518c70e42940e0d8b0e497"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/20388c8d1d74c203fec8194c45cd31afdfab934e"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/3aed0c86afa7877d08722233a8b15e8c1ff8bcb8"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/474e9e1852fb5ba0bfb26f123dd0cb361d0f4f4d"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/552f580a18787cfbd83d28d7d76d584c29f2c4c2"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/89b3fef8809ec1a9acf5f753eb89b9508d7e4466"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/c81504dfd2d93e345c98e7a012c2f2e74ce5b6a1"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/f343bfa3fc9f6255602d66f4a7dbe7ddef13ba41"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



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