CVE-2022-49968 (GCVE-0-2022-49968)
Vulnerability from cvelistv5
Published
2025-06-18 11:00
Modified
2025-06-18 11:00
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: ieee802154/adf7242: defer destroy_workqueue call There is a possible race condition (use-after-free) like below (FREE) | (USE) adf7242_remove | adf7242_channel cancel_delayed_work_sync | destroy_workqueue (1) | adf7242_cmd_rx | mod_delayed_work (2) | The root cause for this race is that the upper layer (ieee802154) is unaware of this detaching event and the function adf7242_channel can be called without any checks. To fix this, we can add a flag write at the beginning of adf7242_remove and add flag check in adf7242_channel. Or we can just defer the destructive operation like other commit 3e0588c291d6 ("hamradio: defer ax25 kfree after unregister_netdev") which let the ieee802154_unregister_hw() to handle the synchronization. This patch takes the second option. runs")
References
Impacted products
Vendor Product Version
Linux Linux Version: 58e9683d14752debc6f22daf6b23e031787df31f
Version: 58e9683d14752debc6f22daf6b23e031787df31f
Version: 58e9683d14752debc6f22daf6b23e031787df31f
Version: 58e9683d14752debc6f22daf6b23e031787df31f
Version: 58e9683d14752debc6f22daf6b23e031787df31f
Version: 58e9683d14752debc6f22daf6b23e031787df31f
Version: a2363e2d88bf50022ee643c49ee5d4f7e8c915ea
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{
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          "product": "Linux",
          "programFiles": [
            "drivers/net/ieee802154/adf7242.c"
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      "cpeApplicability": [
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nieee802154/adf7242: defer destroy_workqueue call\n\nThere is a possible race condition (use-after-free) like below\n\n  (FREE)                     |  (USE)\n  adf7242_remove             |  adf7242_channel\n   cancel_delayed_work_sync  |\n    destroy_workqueue (1)    |   adf7242_cmd_rx\n                             |    mod_delayed_work (2)\n                             |\n\nThe root cause for this race is that the upper layer (ieee802154) is\nunaware of this detaching event and the function adf7242_channel can\nbe called without any checks.\n\nTo fix this, we can add a flag write at the beginning of adf7242_remove\nand add flag check in adf7242_channel. Or we can just defer the\ndestructive operation like other commit 3e0588c291d6 (\"hamradio: defer\nax25 kfree after unregister_netdev\") which let the\nieee802154_unregister_hw() to handle the synchronization. This patch\ntakes the second option.\n\nruns\")"
        }
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      "providerMetadata": {
        "dateUpdated": "2025-06-18T11:00:32.443Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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          "url": "https://git.kernel.org/stable/c/bed12d7531df1417fc92c691999ff95e03835008"
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        {
          "url": "https://git.kernel.org/stable/c/afe7116f6d3b888778ed6d95e3cf724767b9aedf"
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    "cveId": "CVE-2022-49968",
    "datePublished": "2025-06-18T11:00:32.443Z",
    "dateReserved": "2025-06-18T10:57:27.384Z",
    "dateUpdated": "2025-06-18T11:00:32.443Z",
    "state": "PUBLISHED"
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  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2022-49968\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-06-18T11:15:24.123\",\"lastModified\":\"2025-06-18T13:46:52.973\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nieee802154/adf7242: defer destroy_workqueue call\\n\\nThere is a possible race condition (use-after-free) like below\\n\\n  (FREE)                     |  (USE)\\n  adf7242_remove             |  adf7242_channel\\n   cancel_delayed_work_sync  |\\n    destroy_workqueue (1)    |   adf7242_cmd_rx\\n                             |    mod_delayed_work (2)\\n                             |\\n\\nThe root cause for this race is that the upper layer (ieee802154) is\\nunaware of this detaching event and the function adf7242_channel can\\nbe called without any checks.\\n\\nTo fix this, we can add a flag write at the beginning of adf7242_remove\\nand add flag check in adf7242_channel. Or we can just defer the\\ndestructive operation like other commit 3e0588c291d6 (\\\"hamradio: defer\\nax25 kfree after unregister_netdev\\\") which let the\\nieee802154_unregister_hw() to handle the synchronization. This patch\\ntakes the second option.\\n\\nruns\\\")\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: ieee802154/adf7242: aplazar la llamada a destroy_workqueue Existe una posible condici\u00f3n de ejecuci\u00f3n (use-after-free) como la siguiente (FREE) | (USE) adf7242_remove | adf7242_channel cancel_delayed_work_sync | destroy_workqueue (1) | adf7242_cmd_rx | mod_delayed_work (2) | La causa ra\u00edz de esta ejecuci\u00f3n es que la capa superior (ieee802154) desconoce este evento de desconexi\u00f3n y la funci\u00f3n adf7242_channel se puede llamar sin ninguna comprobaci\u00f3n. Para solucionar esto, podemos a\u00f1adir una escritura de bandera al principio de adf7242_remove y a\u00f1adir la comprobaci\u00f3n de bandera en adf7242_channel. O podemos simplemente aplazar la operaci\u00f3n destructiva como en el commit 3e0588c291d6 (\\\"hamradio: defer ax25 kfree after unregister_netdev\\\"), que permite que ieee802154_unregister_hw() gestione la sincronizaci\u00f3n. Este parche utiliza la segunda opci\u00f3n.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/15f3b89bd521d5770d36a61fc04a77c293138ba6\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/23a29932715ca43bceb2eae1bdb770995afe7271\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/9f8558c5c642c62c450c98c99b7d18a709fff485\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/afe7116f6d3b888778ed6d95e3cf724767b9aedf\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/bed12d7531df1417fc92c691999ff95e03835008\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/dede80aaf01f4b6e8657d23726cb4a3da226ec4c\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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