CVE-2025-68287 (GCVE-0-2025-68287)

Vulnerability from cvelistv5 – Published: 2025-12-16 15:06 – Updated: 2025-12-16 15:06
VLAI?
Title
usb: dwc3: Fix race condition between concurrent dwc3_remove_requests() call paths
Summary
In the Linux kernel, the following vulnerability has been resolved: usb: dwc3: Fix race condition between concurrent dwc3_remove_requests() call paths This patch addresses a race condition caused by unsynchronized execution of multiple call paths invoking `dwc3_remove_requests()`, leading to premature freeing of USB requests and subsequent crashes. Three distinct execution paths interact with `dwc3_remove_requests()`: Path 1: Triggered via `dwc3_gadget_reset_interrupt()` during USB reset handling. The call stack includes: - `dwc3_ep0_reset_state()` - `dwc3_ep0_stall_and_restart()` - `dwc3_ep0_out_start()` - `dwc3_remove_requests()` - `dwc3_gadget_del_and_unmap_request()` Path 2: Also initiated from `dwc3_gadget_reset_interrupt()`, but through `dwc3_stop_active_transfers()`. The call stack includes: - `dwc3_stop_active_transfers()` - `dwc3_remove_requests()` - `dwc3_gadget_del_and_unmap_request()` Path 3: Occurs independently during `adb root` execution, which triggers USB function unbind and bind operations. The sequence includes: - `gserial_disconnect()` - `usb_ep_disable()` - `dwc3_gadget_ep_disable()` - `dwc3_remove_requests()` with `-ESHUTDOWN` status Path 3 operates asynchronously and lacks synchronization with Paths 1 and 2. When Path 3 completes, it disables endpoints and frees 'out' requests. If Paths 1 or 2 are still processing these requests, accessing freed memory leads to a crash due to use-after-free conditions. To fix this added check for request completion and skip processing if already completed and added the request status for ep0 while queue.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 72246da40f3719af3bfd104a2365b32537c27d83 , < 467add9db13219101f14b6cc5477998b4aaa5fe2 (git)
Affected: 72246da40f3719af3bfd104a2365b32537c27d83 , < 67192e8cb7f941b5bba91e4bb290683576ce1607 (git)
Affected: 72246da40f3719af3bfd104a2365b32537c27d83 , < 47de14d741cc4057046c9e2f33df1f7828254e6c (git)
Affected: 72246da40f3719af3bfd104a2365b32537c27d83 , < afc0e34f161ce61ad351303c46eb57bd44b8b090 (git)
Affected: 72246da40f3719af3bfd104a2365b32537c27d83 , < 7cfb62888eba292fa35cd9ddbd28ce595f60e139 (git)
Affected: 72246da40f3719af3bfd104a2365b32537c27d83 , < fa5eaf701e576880070b60922200557ae4aa54e1 (git)
Affected: 72246da40f3719af3bfd104a2365b32537c27d83 , < e4037689a366743c4233966f0e74bc455820d316 (git)
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    Linux Linux Affected: 3.2
Unaffected: 0 , < 3.2 (semver)
Unaffected: 5.10.247 , ≤ 5.10.* (semver)
Unaffected: 5.15.197 , ≤ 5.15.* (semver)
Unaffected: 6.1.159 , ≤ 6.1.* (semver)
Unaffected: 6.6.119 , ≤ 6.6.* (semver)
Unaffected: 6.12.61 , ≤ 6.12.* (semver)
Unaffected: 6.17.11 , ≤ 6.17.* (semver)
Unaffected: 6.18 , ≤ * (original_commit_for_fix)
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{
  "containers": {
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          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/usb/dwc3/ep0.c",
            "drivers/usb/dwc3/gadget.c"
          ],
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      "cpeApplicability": [
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nusb: dwc3: Fix race condition between concurrent dwc3_remove_requests() call paths\n\nThis patch addresses a race condition caused by unsynchronized\nexecution of multiple call paths invoking `dwc3_remove_requests()`,\nleading to premature freeing of USB requests and subsequent crashes.\n\nThree distinct execution paths interact with `dwc3_remove_requests()`:\nPath 1:\nTriggered via `dwc3_gadget_reset_interrupt()` during USB reset\nhandling. The call stack includes:\n- `dwc3_ep0_reset_state()`\n- `dwc3_ep0_stall_and_restart()`\n- `dwc3_ep0_out_start()`\n- `dwc3_remove_requests()`\n- `dwc3_gadget_del_and_unmap_request()`\n\nPath 2:\nAlso initiated from `dwc3_gadget_reset_interrupt()`, but through\n`dwc3_stop_active_transfers()`. The call stack includes:\n- `dwc3_stop_active_transfers()`\n- `dwc3_remove_requests()`\n- `dwc3_gadget_del_and_unmap_request()`\n\nPath 3:\nOccurs independently during `adb root` execution, which triggers\nUSB function unbind and bind operations. The sequence includes:\n- `gserial_disconnect()`\n- `usb_ep_disable()`\n- `dwc3_gadget_ep_disable()`\n- `dwc3_remove_requests()` with `-ESHUTDOWN` status\n\nPath 3 operates asynchronously and lacks synchronization with Paths\n1 and 2. When Path 3 completes, it disables endpoints and frees \u0027out\u0027\nrequests. If Paths 1 or 2 are still processing these requests,\naccessing freed memory leads to a crash due to use-after-free conditions.\n\nTo fix this added check for request completion and skip processing\nif already completed and added the request status for ep0 while queue."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-12-16T15:06:08.711Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
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          "url": "https://git.kernel.org/stable/c/467add9db13219101f14b6cc5477998b4aaa5fe2"
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        {
          "url": "https://git.kernel.org/stable/c/e4037689a366743c4233966f0e74bc455820d316"
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      ],
      "title": "usb: dwc3: Fix race condition between concurrent dwc3_remove_requests() call paths",
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        "engine": "bippy-1.2.0"
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    }
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-68287",
    "datePublished": "2025-12-16T15:06:08.711Z",
    "dateReserved": "2025-12-16T14:48:05.292Z",
    "dateUpdated": "2025-12-16T15:06:08.711Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2025-68287\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-12-16T16:16:07.510\",\"lastModified\":\"2025-12-18T15:08:06.237\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nusb: dwc3: Fix race condition between concurrent dwc3_remove_requests() call paths\\n\\nThis patch addresses a race condition caused by unsynchronized\\nexecution of multiple call paths invoking `dwc3_remove_requests()`,\\nleading to premature freeing of USB requests and subsequent crashes.\\n\\nThree distinct execution paths interact with `dwc3_remove_requests()`:\\nPath 1:\\nTriggered via `dwc3_gadget_reset_interrupt()` during USB reset\\nhandling. The call stack includes:\\n- `dwc3_ep0_reset_state()`\\n- `dwc3_ep0_stall_and_restart()`\\n- `dwc3_ep0_out_start()`\\n- `dwc3_remove_requests()`\\n- `dwc3_gadget_del_and_unmap_request()`\\n\\nPath 2:\\nAlso initiated from `dwc3_gadget_reset_interrupt()`, but through\\n`dwc3_stop_active_transfers()`. The call stack includes:\\n- `dwc3_stop_active_transfers()`\\n- `dwc3_remove_requests()`\\n- `dwc3_gadget_del_and_unmap_request()`\\n\\nPath 3:\\nOccurs independently during `adb root` execution, which triggers\\nUSB function unbind and bind operations. The sequence includes:\\n- `gserial_disconnect()`\\n- `usb_ep_disable()`\\n- `dwc3_gadget_ep_disable()`\\n- `dwc3_remove_requests()` with `-ESHUTDOWN` status\\n\\nPath 3 operates asynchronously and lacks synchronization with Paths\\n1 and 2. When Path 3 completes, it disables endpoints and frees \u0027out\u0027\\nrequests. If Paths 1 or 2 are still processing these requests,\\naccessing freed memory leads to a crash due to use-after-free conditions.\\n\\nTo fix this added check for request completion and skip processing\\nif already completed and added the request status for ep0 while queue.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/467add9db13219101f14b6cc5477998b4aaa5fe2\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/47de14d741cc4057046c9e2f33df1f7828254e6c\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/67192e8cb7f941b5bba91e4bb290683576ce1607\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/7cfb62888eba292fa35cd9ddbd28ce595f60e139\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/afc0e34f161ce61ad351303c46eb57bd44b8b090\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/e4037689a366743c4233966f0e74bc455820d316\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/fa5eaf701e576880070b60922200557ae4aa54e1\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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