CVE-2024-58238 (GCVE-0-2024-58238)

Vulnerability from cvelistv5 – Published: 2025-08-09 14:31 – Updated: 2025-09-19 15:21
VLAI?
Title
Bluetooth: btnxpuart: Resolve TX timeout error in power save stress test
Summary
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: btnxpuart: Resolve TX timeout error in power save stress test This fixes the tx timeout issue seen while running a stress test on btnxpuart for couple of hours, such that the interval between two HCI commands coincide with the power save timeout value of 2 seconds. Test procedure using bash script: <load btnxpuart.ko> hciconfig hci0 up //Enable Power Save feature hcitool -i hci0 cmd 3f 23 02 00 00 while (true) do hciconfig hci0 leadv sleep 2 hciconfig hci0 noleadv sleep 2 done Error log, after adding few more debug prints: Bluetooth: btnxpuart_queue_skb(): 01 0A 20 01 00 Bluetooth: hci0: Set UART break: on, status=0 Bluetooth: hci0: btnxpuart_tx_wakeup() tx_work scheduled Bluetooth: hci0: btnxpuart_tx_work() dequeue: 01 0A 20 01 00 Can't set advertise mode on hci0: Connection timed out (110) Bluetooth: hci0: command 0x200a tx timeout When the power save mechanism turns on UART break, and btnxpuart_tx_work() is scheduled simultaneously, psdata->ps_state is read as PS_STATE_AWAKE, which prevents the psdata->work from being scheduled, which is responsible to turn OFF UART break. This issue is fixed by adding a ps_lock mutex around UART break on/off as well as around ps_state read/write. btnxpuart_tx_wakeup() will now read updated ps_state value. If ps_state is PS_STATE_SLEEP, it will first schedule psdata->work, and then it will reschedule itself once UART break has been turned off and ps_state is PS_STATE_AWAKE. Tested above script for 50,000 iterations and TX timeout error was not observed anymore.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 689ca16e523278470c38832a3010645a78c544d8 , < 9d5df94ce0e213d5b549633f528f96114c736190 (git)
Affected: 689ca16e523278470c38832a3010645a78c544d8 , < e4db90e4eb8d5487098712ffb1048f3fa6d25e98 (git)
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    Linux Linux Affected: 6.4
Unaffected: 0 , < 6.4 (semver)
Unaffected: 6.6.49 , ≤ 6.6.* (semver)
Unaffected: 6.9 , ≤ * (original_commit_for_fix)
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{
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      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/bluetooth/btnxpuart.c"
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: btnxpuart: Resolve TX timeout error in power save stress test\n\nThis fixes the tx timeout issue seen while running a stress test on\nbtnxpuart for couple of hours, such that the interval between two HCI\ncommands coincide with the power save timeout value of 2 seconds.\n\nTest procedure using bash script:\n\u003cload btnxpuart.ko\u003e\nhciconfig hci0 up\n//Enable Power Save feature\nhcitool -i hci0 cmd 3f 23 02 00 00\nwhile (true)\ndo\n    hciconfig hci0 leadv\n    sleep 2\n    hciconfig hci0 noleadv\n    sleep 2\ndone\n\nError log, after adding few more debug prints:\nBluetooth: btnxpuart_queue_skb(): 01 0A 20 01 00\nBluetooth: hci0: Set UART break: on, status=0\nBluetooth: hci0: btnxpuart_tx_wakeup() tx_work scheduled\nBluetooth: hci0: btnxpuart_tx_work() dequeue: 01 0A 20 01 00\nCan\u0027t set advertise mode on hci0: Connection timed out (110)\nBluetooth: hci0: command 0x200a tx timeout\n\nWhen the power save mechanism turns on UART break, and btnxpuart_tx_work()\nis scheduled simultaneously, psdata-\u003eps_state is read as PS_STATE_AWAKE,\nwhich prevents the psdata-\u003ework from being scheduled, which is responsible\nto turn OFF UART break.\n\nThis issue is fixed by adding a ps_lock mutex around UART break on/off as\nwell as around ps_state read/write.\nbtnxpuart_tx_wakeup() will now read updated ps_state value. If ps_state is\nPS_STATE_SLEEP, it will first schedule psdata-\u003ework, and then it will\nreschedule itself once UART break has been turned off and ps_state is\nPS_STATE_AWAKE.\n\nTested above script for 50,000 iterations and TX timeout error was not\nobserved anymore."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-09-19T15:21:43.755Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/9d5df94ce0e213d5b549633f528f96114c736190"
        },
        {
          "url": "https://git.kernel.org/stable/c/e4db90e4eb8d5487098712ffb1048f3fa6d25e98"
        }
      ],
      "title": "Bluetooth: btnxpuart: Resolve TX timeout error in power save stress test",
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  "cveMetadata": {
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    "assignerShortName": "Linux",
    "cveId": "CVE-2024-58238",
    "datePublished": "2025-08-09T14:31:47.079Z",
    "dateReserved": "2025-04-16T07:19:43.804Z",
    "dateUpdated": "2025-09-19T15:21:43.755Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}


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