greybus: raw: fix use-after-free if write is called after disconnect_CVE-2026-53024

{
    "lastseen": "",
    "description": "In the Linux kernel, the following vulnerability has been resolved:\n\ngreybus: raw: fix use-after-free if write is called after disconnect\n\nIf a user writes to the chardev after disconnect has been called, the\nkernel panics with the following trace (with\nCONFIG_INIT_ON_FREE_DEFAULT_ON=y):\n\n        BUG: kernel NULL pointer dereference, address: 0000000000000218\n         ...\n        Call Trace:\n         <TASK>\n         gb_operation_create_common+0x61/0x180\n         gb_operation_create_flags+0x28/0xa0\n         gb_operation_sync_timeout+0x6f/0x100\n         raw_write+0x7b/0xc7 [gb_raw]\n         vfs_write+0xcf/0x420\n         ? task_mm_cid_work+0x136/0x220\n         ksys_write+0x63/0xe0\n         do_syscall_64+0xa4/0x290\n         entry_SYSCALL_64_after_hwframe+0x77/0x7f\n\nDisconnect calls gb_connection_destroy, which ends up freeing the\nconnection object. When gb_operation_sync is called in the write file\noperations, its gets a freed connection as parameter and the kernel\npanics.\n\nThe gb_connection_destroy cannot be moved out of the disconnect\nfunction, as the Greybus subsystem expect all connections belonging to a\nbundle to be destroyed when disconnect returns.\n\nTo prevent this bug, use a rw lock to synchronize access between write\nand disconnect. This guarantees that the write function doesn't try\nto use a disconnected connection.",
    "published": "2026-06-24T16:29:33.184Z",
    "modified": "2026-06-28T06:38:07.497Z",
    "type": "cve",
    "title": "greybus: raw: fix use-after-free if write is called after disconnect",
    "source": "Linux",
    "references": "https://git.kernel.org/stable/c/48d6c32bc049abd114e8f0836c0e7d7cbfba7827\nhttps://git.kernel.org/stable/c/84265cbd96b97058ef67e3f8be3933667a000835",
    "id": "CVE-2026-53024",
    "bulletinFamily": "",
    "cwe": null,
    "cvelist": null,
    "sourceData": "Linux Linux e806c7fb8e9bae87fc23958c3789f2c2f96f54a4\nLinux Linux e806c7fb8e9bae87fc23958c3789f2c2f96f54a4\nLinux Linux 4.9",
    "sourceHref": "",
    "cvss": {
        "score": 7.8,
        "severity": "HIGH",
        "vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
        "version": "3.1"
    },
    "cvss2": [],
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        "baseScore": 0,
        "baseSeverity": "",
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        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
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            "baseScore": 0,
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    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "Linux",
    "version": "e806c7fb8e9bae87fc23958c3789f2c2f96f54a4",
    "vendor": "Linux",
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    "ai_score": 0
}