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CVE-2024-58238

Estado: ModificadaMedia (5.5)—

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

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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.

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

Tecnologías afectadas (1)

Linux — Linux Kernel

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2024-58238",
  "cveTags": [],
  "metrics": {
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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          "version": "3.1",
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          "attackVector": "ADJACENT_NETWORK",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H",
          "integrityImpact": "LOW",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "NONE"
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  "published": "2025-08-09T15:15:27.893",
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      "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<load btnxpuart.ko>\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't 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->ps_state is read as PS_STATE_AWAKE,\nwhich prevents the psdata->work 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->work, 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."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: Bluetooth: btnxpuart: resolver error de tiempo de espera de TX en la prueba de esfuerzo de ahorro de energía Esto corrige el problema de tiempo de espera de TX observado al ejecutar una prueba de esfuerzo en btnxpuart durante un par de horas, de modo que el intervalo entre dos comandos HCI coincida con el valor de tiempo de espera de ahorro de energía de 2 segundos. Procedimiento de prueba usando script bash:  hciconfig hci0 up //Habilitar función de ahorro de energía hcitool -i hci0 cmd 3f 23 02 00 00 while (true) do hciconfig hci0 leadv sleep 2 hciconfig hci0 noleadv sleep 2 done Registro de errores, después de agregar algunas impresiones de depuración más: Bluetooth: btnxpuart_queue_skb(): 01 0A 20 01 00 Bluetooth: hci0: Establecer UART break: activado, estado=0 Bluetooth: hci0: btnxpuart_tx_wakeup() tx_work programado Bluetooth: hci0: btnxpuart_tx_work() dequeue: 01 0A 20 01 00 No se puede establecer el modo de anuncio en hci0: Se agotó el tiempo de conexión (110) Bluetooth: hci0: comando 0x200a Tiempo de espera de TX: Cuando el mecanismo de ahorro de energía activa la interrupción de UART y btnxpuart_tx_work() se programa simultáneamente, psdata-&gt;ps_state se lee como PS_STATE_AWAKE, lo que impide que se programe psdata-&gt;work, que es responsable de desactivar la interrupción de UART. Este problema se soluciona añadiendo un mutex ps_lock alrededor de la activación/desactivación de la interrupción de UART, así como alrededor de la lectura/escritura de ps_state. btnxpuart_tx_wakeup() ahora leerá el valor actualizado de ps_state. Si ps_state es PS_STATE_SLEEP, primero programará psdata-&gt;work y luego se reprogramará a sí mismo una vez que la interrupción de UART se haya desactivado y ps_state sea PS_STATE_AWAKE. Probé el script anterior durante 50,000 iteraciones y el error de tiempo de espera de TX ya no se observó."
    }
  ],
  "lastModified": "2026-08-04T11:22:40.483",
  "configurations": [
    {
      "nodes": [
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