CVE-2024-56599

Estado: ModificadaMedia (5.5)—

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

wifi: ath10k: avoid NULL pointer error during sdio remove

This is because during 'rmmod ath10k', ath10k_sdio_remove() will call ath10k_core_destroy() before destroy_workqueue(). wiphy_dev_release() will finally be called in ath10k_core_destroy(). This function will free struct cfg80211_registered_device *rdev and all its members, including wiphy, dev and the pointer of sdio workqueue. Then the pointer of sdio workqueue will be set to NULL due to CONFIG_INIT_ON_FREE_DEFAULT_ON.

After device release, destroy_workqueue() will use NULL pointer then the kernel panic happen.

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Need to call destroy_workqueue() before ath10k_core_destroy(), free the work queue buffer first and then free pointer of work queue by ath10k_core_destroy(). This order matches the error path order in ath10k_sdio_probe().

No work will be queued on sdio workqueue between it is destroyed and ath10k_core_destroy() is called. Based on the call_stack above, the reason is: Only ath10k_sdio_sleep_timer_handler(), ath10k_sdio_hif_tx_sg() and ath10k_sdio_irq_disable() will queue work on sdio workqueue. Sleep timer will be deleted before ath10k_core_destroy() in ath10k_hif_power_down(). ath10k_sdio_irq_disable() only be called in ath10k_hif_stop(). ath10k_core_unregister() will call ath10k_hif_power_down() to stop hif bus, so ath10k_sdio_hif_tx_sg() won't be called anymore.

Tested-on: QCA6174 hw3.2 SDIO WLAN.RMH.4.4.1-00189

Detalles técnicos trazas, registros y código del informe original

When running 'rmmod ath10k', ath10k_sdio_remove() will free sdio
workqueue by destroy_workqueue(). But if CONFIG_INIT_ON_FREE_DEFAULT_ON
is set to yes, kernel panic will happen:
Call trace:
 destroy_workqueue+0x1c/0x258
 ath10k_sdio_remove+0x84/0x94
 sdio_bus_remove+0x50/0x16c
 device_release_driver_internal+0x188/0x25c
 device_driver_detach+0x20/0x2c

Call trace:
ath10k_sdio_remove
  ->ath10k_core_unregister
    ……
    ->ath10k_core_stop
      ->ath10k_hif_stop
        ->ath10k_sdio_irq_disable
    ->ath10k_hif_power_down
      ->del_timer_sync(&ar_sdio->sleep_timer)
  ->ath10k_core_destroy
    ->ath10k_mac_destroy
      ->ieee80211_free_hw
        ->wiphy_free
    ……
          ->wiphy_dev_release
  ->destroy_workqueue

CVSS

Versión: 3.1
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Puntuación base: 5.5

Probabilidad de explotación (EPSS)

Probabilidad de explotación en los próximos 30 días: 0.24%
Percentil entre todas las CVEs puntuadas: 13
Fecha de la puntuación: 5/10/2026

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

CWE-476

Referencias

JSON original (NVD)

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{
  "id": "CVE-2024-56599",
  "cveTags": [],
  "metrics": {
    "cvssMetricV31": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 5.5,
          "attackVector": "LOCAL",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 1.8
      }
    ]
  },
  "affected": [
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      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "affectedData": [
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          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
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              "version": "5e3dd157d7e70f0e3cea3f2573ed69fb156a19d5",
              "lessThan": "27d5d217ae7ffb99dd623375a17a7d3418d9c755",
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              "lessThan": "6e5dbd1c04abf2c19b2282915e6fa48b6ccc6921",
              "versionType": "git"
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            {
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              "versionType": "git"
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              "versionType": "git"
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          ],
          "programFiles": [
            "drivers/net/wireless/ath/ath10k/sdio.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
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            {
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              "version": "0",
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            {
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              "version": "5.15.181",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
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              "version": "6.1.127",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "status": "unaffected",
              "version": "6.6.70",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "status": "unaffected",
              "version": "6.12.5",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "status": "unaffected",
              "version": "6.13",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "drivers/net/wireless/ath/ath10k/sdio.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2024-12-27T15:15:19.307",
  "references": [
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      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
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      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/543c0924d446b21f35701ca084d7feca09511220",
      "tags": [
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    {
      "url": "https://git.kernel.org/stable/c/6e5dbd1c04abf2c19b2282915e6fa48b6ccc6921",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
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      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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    {
      "url": "https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-476"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: ath10k: avoid NULL pointer error during sdio remove\n\nWhen running 'rmmod ath10k', ath10k_sdio_remove() will free sdio\nworkqueue by destroy_workqueue(). But if CONFIG_INIT_ON_FREE_DEFAULT_ON\nis set to yes, kernel panic will happen:\nCall trace:\n destroy_workqueue+0x1c/0x258\n ath10k_sdio_remove+0x84/0x94\n sdio_bus_remove+0x50/0x16c\n device_release_driver_internal+0x188/0x25c\n device_driver_detach+0x20/0x2c\n\nThis is because during 'rmmod ath10k', ath10k_sdio_remove() will call\nath10k_core_destroy() before destroy_workqueue(). wiphy_dev_release()\nwill finally be called in ath10k_core_destroy(). This function will free\nstruct cfg80211_registered_device *rdev and all its members, including\nwiphy, dev and the pointer of sdio workqueue. Then the pointer of sdio\nworkqueue will be set to NULL due to CONFIG_INIT_ON_FREE_DEFAULT_ON.\n\nAfter device release, destroy_workqueue() will use NULL pointer then the\nkernel panic happen.\n\nCall trace:\nath10k_sdio_remove\n  ->ath10k_core_unregister\n    ……\n    ->ath10k_core_stop\n      ->ath10k_hif_stop\n        ->ath10k_sdio_irq_disable\n    ->ath10k_hif_power_down\n      ->del_timer_sync(&ar_sdio->sleep_timer)\n  ->ath10k_core_destroy\n    ->ath10k_mac_destroy\n      ->ieee80211_free_hw\n        ->wiphy_free\n    ……\n          ->wiphy_dev_release\n  ->destroy_workqueue\n\nNeed to call destroy_workqueue() before ath10k_core_destroy(), free\nthe work queue buffer first and then free pointer of work queue by\nath10k_core_destroy(). This order matches the error path order in\nath10k_sdio_probe().\n\nNo work will be queued on sdio workqueue between it is destroyed and\nath10k_core_destroy() is called. Based on the call_stack above, the\nreason is:\nOnly ath10k_sdio_sleep_timer_handler(), ath10k_sdio_hif_tx_sg() and\nath10k_sdio_irq_disable() will queue work on sdio workqueue.\nSleep timer will be deleted before ath10k_core_destroy() in\nath10k_hif_power_down().\nath10k_sdio_irq_disable() only be called in ath10k_hif_stop().\nath10k_core_unregister() will call ath10k_hif_power_down() to stop hif\nbus, so ath10k_sdio_hif_tx_sg() won't be called anymore.\n\nTested-on: QCA6174 hw3.2 SDIO WLAN.RMH.4.4.1-00189"
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: wifi: ath10k: evitar error de puntero NULL durante la eliminación de sdio Al ejecutar 'rmmod ath10k', ath10k_sdio_remove() liberará la cola de trabajo de sdio mediante destroy_workqueue(). Pero si CONFIG_INIT_ON_FREE_DEFAULT_ON está configurado en sí, se producirá un pánico del kernel: Rastreo de llamada: destroy_workqueue+0x1c/0x258 ath10k_sdio_remove+0x84/0x94 sdio_bus_remove+0x50/0x16c device_release_driver_internal+0x188/0x25c device_driver_detach+0x20/0x2c Esto se debe a que durante 'rmmod ath10k', ath10k_sdio_remove() llamará a ath10k_core_destroy() antes de destroy_workqueue(). wiphy_dev_release() finalmente se llamará en ath10k_core_destroy(). Esta función liberará la estructura cfg80211_registered_device *rdev y todos sus miembros, incluidos wiphy, dev y el puntero de sdio workqueue. Luego, el puntero de sdio workqueue se establecerá en NULL debido a CONFIG_INIT_ON_FREE_DEFAULT_ON. Después de liberar el dispositivo, destroy_workqueue() usará el puntero NULL y luego se producirá el pánico del kernel. Rastreo de llamadas: ath10k_sdio_remove -&gt;ath10k_core_unregister …… -&gt;ath10k_core_stop -&gt;ath10k_hif_stop -&gt;ath10k_sdio_irq_disable -&gt;ath10k_hif_power_down -&gt;del_timer_sync(&amp;ar_sdio-&gt;sleep_timer) -&gt;ath10k_core_destroy -&gt;ath10k_mac_destroy -&gt;ieee80211_free_hw -&gt;wiphy_free …… -&gt;wiphy_dev_release -&gt;destroy_workqueue Es necesario llamar a destroy_workqueue() antes de ath10k_core_destroy(), primero liberar el búfer de la cola de trabajo y luego liberar el puntero de la cola de trabajo mediante ath10k_core_destroy(). Este orden coincide con el orden de la ruta de error en ath10k_sdio_probe(). No se pondrá en cola ningún trabajo en la cola de trabajo de sdio entre su destrucción y la llamada a ath10k_core_destroy(). Según la pila de llamadas anterior, el motivo es el siguiente: solo ath10k_sdio_sleep_timer_handler(), ath10k_sdio_hif_tx_sg() y ath10k_sdio_irq_disable() pondrán en cola el trabajo en la cola de trabajo de sdio. El temporizador de suspensión se eliminará antes de ath10k_core_destroy() en ath10k_hif_power_down(). ath10k_sdio_irq_disable() solo se llamará en ath10k_hif_stop(). ath10k_core_unregister() llamará a ath10k_hif_power_down() para detener el bus hif, por lo que ya no se llamará ath10k_sdio_hif_tx_sg(). Probado en: QCA6174 hw3.2 SDIO WLAN.RMH.4.4.1-00189"
    }
  ],
  "lastModified": "2026-06-17T08:12:30.777",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "75E05E0A-C898-433A-8E50-6D9EC8646A64",
              "versionEndExcluding": "6.12.5"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}