{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2025-38253",
  "modified": "2026-10-09T11:39:44Z",
  "upstream": [
    "CVE-2025-38253"
  ],
  "published": "2025-07-09T10:43:51Z",
  "summary": "HID: wacom: fix crash in wacom_aes_battery_handler()",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nHID: wacom: fix crash in wacom_aes_battery_handler()\n\nCommit fd2a9b29dc9c (\"HID: wacom: Remove AES power_supply after extended\ninactivity\") introduced wacom_aes_battery_handler() which is scheduled\nas a delayed work (aes_battery_work).\n\nIn wacom_remove(), aes_battery_work is not canceled. Consequently, if\nthe device is removed while aes_battery_work is still pending, then hard\ncrashes or \"Oops: general protection fault...\" are experienced when\nwacom_aes_battery_handler() is finally called. E.g., this happens with\nbuilt-in USB devices after resume from hibernate when aes_battery_work\nwas still pending at the time of hibernation.\n\nSo, take care to cancel aes_battery_work in wacom_remove().",
  "severity": [
    {
      "type": "CVSS_V3",
      "score": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
    }
  ],
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  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2025-38253"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/a4f182ffa30c52ad1c8e12edfb8049ee748c0f1b"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/57a3d82200dbeccd002244b96acad570eeeb731f"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/f3054152c12e2eed1e72704aff47b0ea58229584"
    }
  ],
  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-08-05T12:19:11Z",
    "severity": {
      "source": "kernel CNA",
      "cvss_v3_score": 8.8,
      "cvss_v3_severity": "High",
      "scenario": "AV:A - The wacom driver binds any Bluetooth HID device presenting Wacom's vendor ID via `BT_DEVICE_WACOM(HID_ANY_ID)` and hid-core's forced `HID_GROUP_WACOM`, so an attacker within Bluetooth range supplying a crafted report descriptor and pen reports reaches the vulnerable path. This matches the adjacent-network scoring used for other Wacom HID report-processing flaws.\nAC:L - The attacker device controls every step \u2014 the report descriptor that sets WACOM_QUIRK_AESPEN, the pen report with sense=0 that arms the work, and the disconnect that frees `struct wacom` \u2014 and the 30-minute delay window guarantees the work is still pending at removal. No race must be won and no uncontrollable state is required.\nPR:N - Everything happens inside kernel HID transport and driver probe/report/remove handling; no user account, credential, or capability on the target is involved. The attacker only needs their device connected to the host.\nUI:N - Once the device is connected, arming the delayed work and then tearing down the link are entirely device-driven with no action by any user on the target. Consistent with prior Wacom HID CVEs scored UI:N.\nS:U - The use-after-free corrupts kernel heap memory and executes within the same kernel security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - The freed devm-allocated `struct wacom` is a sprayable slab object whose contents are subsequently used as a workqueue pointer, work function pointer, and `hdev` pointer, giving an attacker who grooms the slab an arbitrary-read/kernel-memory-disclosure primitive.\nI:H - `process_one_work()` invokes `work->func()` read from the freed object and `devres_release_group()` walks stale list data invoking release callbacks, yielding control-flow hijack and arbitrary-write potential; the leftover armed timer in the timer wheel adds list-corruption write primitives.\nA:H - The commit explicitly reports \"hard crashes or 'Oops: general protection fault'\" when the pending work fires after device removal, and the attacker can trigger this repeatedly by reconnecting and disconnecting."
    }
  }
}