{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2024-27052",
  "modified": "2026-10-09T11:39:44Z",
  "upstream": [
    "CVE-2024-27052"
  ],
  "published": "2024-05-01T12:57:40Z",
  "summary": "wifi: rtl8xxxu: add cancel_work_sync() for c2hcmd_work",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: rtl8xxxu: add cancel_work_sync() for c2hcmd_work\n\nThe workqueue might still be running, when the driver is stopped. To\navoid a use-after-free, call cancel_work_sync() in rtl8xxxu_stop().",
  "severity": [
    {
      "type": "CVSS_V3",
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
    }
  ],
  "affected": [
    {
      "package": {
        "ecosystem": "Raspberry Pi OS:12",
        "name": "linux"
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        "1:6.1.58-1+rpt2",
        "1:6.1.63-1+rpt1",
        "1:6.1.73-1+rpt1",
        "1:6.6.20-1+rpt1"
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  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2024-27052"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/dddedfa3b29a63c2ca4336663806a6128b8545b4"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/ac512507ac89c01ed6cd4ca53032f52cdb23ea59"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/3518cea837de4d106efa84ddac18a07b6de1384e"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/156012667b85ca7305cb363790d3ae8519a6f41e"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/7059cdb69f8e1a2707dd1e2f363348b507ed7707"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/58fe3bbddfec10c6b216096d8c0e517cd8463e3a"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/1213acb478a7181cd73eeaf00db430f1e45b1361"
    }
  ],
  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-08-05T11:52:36Z",
    "severity": {
      "source": "kernel CNA",
      "cvss_v3_score": 7.8,
      "cvss_v3_severity": "High",
      "scenario": "AV:L - The exploitable window is opened by a local action that stops the device (`ip link set down`, suspend, rfkill, driver unbind) \u2014 a remote or adjacent Wi-Fi attacker can queue `c2hcmd_work` but cannot cause `rtl8xxxu_stop()`/`ieee80211_free_hw()` to run. This matches the AV:L scoring of the directly analogous `rtl8187_stop()` teardown UAF (CVE-2025-38604).\nAC:L - The attacker controls both sides of the race: Wi-Fi/BT-coex activity keeps C2H events and RA reports flowing so `schedule_work(&priv->c2hcmd_work)` fires continuously, and the attacker chooses the exact moment to trigger the stop/unbind, so the window can be hit repeatedly until won.\nPR:L - An ordinary local user in a normal desktop/embedded session can reach the teardown path via logind-mediated suspend or rfkill, and no capability is needed to generate the Wi-Fi traffic that keeps the work queued; consistent with PR:L used across the driver-teardown UAF class.\nUI:N - The attacker performs both the traffic generation and the interface stop themselves; no separate victim has to open a file, mount anything, or take any action.\nS:U - The use-after-free corrupts kernel heap memory within the same kernel security authority; there is no crossing of a VM, IOMMU, or sandbox boundary.\nC:H - The freed `rtl8xxxu_priv` slab object can be reclaimed and groomed by the attacker, and the work callback reads through it (`priv->fops`, `priv->udev->dev`, `priv->c2hcmd_queue`), yielding a use-after-free read primitive that can disclose arbitrary kernel memory.\nI:H - The stale work item writes into the freed object (skb dequeue/list manipulation on `c2hcmd_queue`, updates to `priv->ra_report` and `priv->bt_coex`), and the workqueue core manipulates the freed embedded `work_struct`, giving a controlled-write primitive on reclaimed heap memory that is leverageable for control-flow hijack.\nA:H - Even unexploited, the use-after-free reliably produces a kernel oops or panic when the work runs against freed memory, and it can be retriggered on every device stop."
    }
  }
}