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usb: gadget: aspeed-vhub: cancel wake work on device removal

Type: advisorySource: Official CVE List1 source record

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.

Announced Source revision 1
Original source ↗

CVE-2026-98766

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: cve:CVE-2026-98766

Linux

Source reference: /containers/cna/affected/0/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Linux

Source reference: /containers/cna/affected/1/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "7ecca2a4080cb6b1fa174adc588fce9e9014c43c",
        "lessThan": "0d39ac4f65f9357469518c70e42940e0d8b0e497",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "7ecca2a4080cb6b1fa174adc588fce9e9014c43c",
        "lessThan": "f343bfa3fc9f6255602d66f4a7dbe7ddef13ba41",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "7ecca2a4080cb6b1fa174adc588fce9e9014c43c",
        "lessThan": "474e9e1852fb5ba0bfb26f123dd0cb361d0f4f4d",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "7ecca2a4080cb6b1fa174adc588fce9e9014c43c",
        "lessThan": "c81504dfd2d93e345c98e7a012c2f2e74ce5b6a1",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "7ecca2a4080cb6b1fa174adc588fce9e9014c43c",
        "lessThan": "20388c8d1d74c203fec8194c45cd31afdfab934e",
        "versionType": "git"
      }
    ],
    "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"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "4.18"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "4.18",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "6.6.160",
        "versionType": "semver",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.12.113",
        "versionType": "semver",
        "lessThanOrEqual": "6.12.*"
      },
      {
        "status": "unaffected",
        "version": "6.18.56",
        "versionType": "semver",
        "lessThanOrEqual": "6.18.*"
      },
      {
        "status": "unaffected",
        "version": "7.2.10",
        "versionType": "semver",
        "lessThanOrEqual": "7.2.*"
      },
      {
        "status": "unaffected",
        "version": "7.3",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "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"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-98766

Source reference: /cveMetadata/cveId

Publisher severity

No explicit severity was provided.

Event
#48960 · Revision 1
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Publisher date
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