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CVE-2024-47724

Estado: ModificadaMedia (5.5)—

In the Linux kernel, the following vulnerability has been resolved:

wifi: ath11k: use work queue to process beacon tx event

Commit 3a415daa3e8b ("wifi: ath11k: add P2P IE in beacon template") from Feb 28, 2024 (linux-next), leads to the following Smatch static checker warning:

drivers/net/wireless/ath/ath11k/wmi.c:1742 ath11k_wmi_p2p_go_bcn_ie() warn: sleeping in atomic context

The reason is that ath11k_bcn_tx_status_event() will directly call might sleep function ath11k_wmi_cmd_send() during RCU read-side critical sections. The call trace is like:

ath11k_bcn_tx_status_event() -> rcu_read_lock() -> ath11k_mac_bcn_tx_event() -> ath11k_mac_setup_bcn_tmpl() …… -> ath11k_wmi_bcn_tmpl() -> ath11k_wmi_cmd_send() -> rcu_read_unlock()

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Commit 886433a98425 ("ath11k: add support for BSS color change") added the ath11k_mac_bcn_tx_event(), commit 01e782c89108 ("ath11k: fix warning of RCU usage for ath11k_mac_get_arvif_by_vdev_id()") added the RCU lock to avoid warning but also introduced this BUG.

Use work queue to avoid directly calling ath11k_mac_bcn_tx_event() during RCU critical sections. No need to worry about the deletion of vif because cancel_work_sync() will drop the work if it doesn't start or block vif deletion until the running work is done.

Tested-on: WCN6855 hw2.0 PCI WLAN.HSP.1.1-03125-QCAHSPSWPL_V1_V2_SILICONZ_LITE-3.6510.30

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-2024-47724",
  "cveTags": [],
  "metrics": {
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          "role": "CISA Coordinator",
          "options": [
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              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
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          "version": "2.0.3",
          "timestamp": "2024-10-21T13:01:30.955907Z"
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          "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
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          "integrityImpact": "NONE",
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          "programFiles": [
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          "programFiles": [
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  "published": "2024-10-21T13:15:02.590",
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  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: ath11k: use work queue to process beacon tx event\n\nCommit 3a415daa3e8b (\"wifi: ath11k: add P2P IE in beacon template\")\nfrom Feb 28, 2024 (linux-next), leads to the following Smatch static\nchecker warning:\n\ndrivers/net/wireless/ath/ath11k/wmi.c:1742 ath11k_wmi_p2p_go_bcn_ie()\nwarn: sleeping in atomic context\n\nThe reason is that ath11k_bcn_tx_status_event() will directly call might\nsleep function ath11k_wmi_cmd_send() during RCU read-side critical\nsections. The call trace is like:\n\nath11k_bcn_tx_status_event()\n-> rcu_read_lock()\n-> ath11k_mac_bcn_tx_event()\n\t-> ath11k_mac_setup_bcn_tmpl()\n\t……\n\t\t-> ath11k_wmi_bcn_tmpl()\n\t\t\t-> ath11k_wmi_cmd_send()\n-> rcu_read_unlock()\n\nCommit 886433a98425 (\"ath11k: add support for BSS color change\") added the\nath11k_mac_bcn_tx_event(), commit 01e782c89108 (\"ath11k: fix warning\nof RCU usage for ath11k_mac_get_arvif_by_vdev_id()\") added the RCU lock\nto avoid warning but also introduced this BUG.\n\nUse work queue to avoid directly calling ath11k_mac_bcn_tx_event()\nduring RCU critical sections. No need to worry about the deletion of vif\nbecause cancel_work_sync() will drop the work if it doesn't start or\nblock vif deletion until the running work is done.\n\nTested-on: WCN6855 hw2.0 PCI WLAN.HSP.1.1-03125-QCAHSPSWPL_V1_V2_SILICONZ_LITE-3.6510.30"
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: wifi: ath11k: usar cola de trabajo para procesar evento beacon tx el commit 3a415daa3e8b (\"wifi: ath11k: agregar P2P IE en plantilla beacon\") del 28 de febrero de 2024 (linux-next) genera la siguiente advertencia del verificador estático de Smatch: drivers/net/wireless/ath/ath11k/wmi.c:1742 ath11k_wmi_p2p_go_bcn_ie() warn: durmiendo en contexto atómico La razón es que ath11k_bcn_tx_status_event() llamará directamente a la función de suspensión ath11k_wmi_cmd_send() durante las secciones críticas del lado de lectura de RCU. El seguimiento de la llamada es así: ath11k_bcn_tx_status_event() -> rcu_read_lock() -> ath11k_mac_bcn_tx_event() -> ath11k_mac_setup_bcn_tmpl() …… -> ath11k_wmi_bcn_tmpl() -> ath11k_wmi_cmd_send() -> rcu_read_unlock() el commit 886433a98425 (\"ath11k: agregar soporte para cambio de color BSS\") agregó ath11k_mac_bcn_tx_event(), el commit 01e782c89108 (\"ath11k: corregir advertencia de uso de RCU para ath11k_mac_get_arvif_by_vdev_id()\") agregó el bloqueo de RCU para evitar advertencias pero también introdujo este ERROR. Utilice la cola de trabajo para evitar llamar directamente a ath11k_mac_bcn_tx_event() durante las secciones críticas de RCU. No es necesario preocuparse por la eliminación de vif porque cancel_work_sync() descartará el trabajo si no comienza o bloqueará la eliminación de vif hasta que finalice el trabajo en ejecución. Probado en: WCN6855 hw2.0 PCI WLAN.HSP.1.1-03125-QCAHSPSWPL_V1_V2_SILICONZ_LITE-3.6510.30"
    }
  ],
  "lastModified": "2026-08-04T11:20:44.753",
  "configurations": [
    {
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        {
          "negate": false,
          "cpeMatch": [
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              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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          "operator": "OR"
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  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}