{
    "data_version": "4.0",
    "data_type": "CVE",
    "data_format": "MITRE",
    "CVE_data_meta": {
        "ID": "CVE-2024-26698",
        "ASSIGNER": "cve@kernel.org",
        "STATE": "PUBLIC"
    },
    "description": {
        "description_data": [
            {
                "lang": "eng",
                "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nhv_netvsc: Fix race condition between netvsc_probe and netvsc_remove\n\nIn commit ac5047671758 (\"hv_netvsc: Disable NAPI before closing the\nVMBus channel\"), napi_disable was getting called for all channels,\nincluding all subchannels without confirming if they are enabled or not.\n\nThis caused hv_netvsc getting hung at napi_disable, when netvsc_probe()\nhas finished running but nvdev->subchan_work has not started yet.\nnetvsc_subchan_work() -> rndis_set_subchannel() has not created the\nsub-channels and because of that netvsc_sc_open() is not running.\nnetvsc_remove() calls cancel_work_sync(&nvdev->subchan_work), for which\nnetvsc_subchan_work did not run.\n\nnetif_napi_add() sets the bit NAPI_STATE_SCHED because it ensures NAPI\ncannot be scheduled. Then netvsc_sc_open() -> napi_enable will clear the\nNAPIF_STATE_SCHED bit, so it can be scheduled. napi_disable() does the\nopposite.\n\nNow during netvsc_device_remove(), when napi_disable is called for those\nsubchannels, napi_disable gets stuck on infinite msleep.\n\nThis fix addresses this problem by ensuring that napi_disable() is not\ngetting called for non-enabled NAPI struct.\nBut netif_napi_del() is still necessary for these non-enabled NAPI struct\nfor cleanup purpose.\n\nCall trace:\n[  654.559417] task:modprobe        state:D stack:    0 pid: 2321 ppid:  1091 flags:0x00004002\n[  654.568030] Call Trace:\n[  654.571221]  <TASK>\n[  654.573790]  __schedule+0x2d6/0x960\n[  654.577733]  schedule+0x69/0xf0\n[  654.581214]  schedule_timeout+0x87/0x140\n[  654.585463]  ? __bpf_trace_tick_stop+0x20/0x20\n[  654.590291]  msleep+0x2d/0x40\n[  654.593625]  napi_disable+0x2b/0x80\n[  654.597437]  netvsc_device_remove+0x8a/0x1f0 [hv_netvsc]\n[  654.603935]  rndis_filter_device_remove+0x194/0x1c0 [hv_netvsc]\n[  654.611101]  ? do_wait_intr+0xb0/0xb0\n[  654.615753]  netvsc_remove+0x7c/0x120 [hv_netvsc]\n[  654.621675]  vmbus_remove+0x27/0x40 [hv_vmbus]"
            }
        ]
    },
    "problemtype": {
        "problemtype_data": [
            {
                "description": [
                    {
                        "lang": "eng",
                        "value": "n/a"
                    }
                ]
            }
        ]
    },
    "affects": {
        "vendor": {
            "vendor_data": [
                {
                    "vendor_name": "Linux",
                    "product": {
                        "product_data": [
                            {
                                "product_name": "Linux",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_affected": "<",
                                            "version_name": "ac5047671758",
                                            "version_value": "9ec807e7b6f5"
                                        },
                                        {
                                            "version_value": "not down converted",
                                            "x_cve_json_5_version_data": {
                                                "versions": [
                                                    {
                                                        "version": "5.8",
                                                        "status": "affected"
                                                    },
                                                    {
                                                        "version": "0",
                                                        "lessThan": "5.8",
                                                        "status": "unaffected",
                                                        "versionType": "custom"
                                                    },
                                                    {
                                                        "version": "5.10.210",
                                                        "lessThanOrEqual": "5.10.*",
                                                        "status": "unaffected",
                                                        "versionType": "custom"
                                                    },
                                                    {
                                                        "version": "5.15.149",
                                                        "lessThanOrEqual": "5.15.*",
                                                        "status": "unaffected",
                                                        "versionType": "custom"
                                                    },
                                                    {
                                                        "version": "6.1.79",
                                                        "lessThanOrEqual": "6.1.*",
                                                        "status": "unaffected",
                                                        "versionType": "custom"
                                                    },
                                                    {
                                                        "version": "6.6.18",
                                                        "lessThanOrEqual": "6.6.*",
                                                        "status": "unaffected",
                                                        "versionType": "custom"
                                                    },
                                                    {
                                                        "version": "6.7.6",
                                                        "lessThanOrEqual": "6.7.*",
                                                        "status": "unaffected",
                                                        "versionType": "custom"
                                                    },
                                                    {
                                                        "version": "6.8",
                                                        "lessThanOrEqual": "*",
                                                        "status": "unaffected",
                                                        "versionType": "original_commit_for_fix"
                                                    }
                                                ],
                                                "defaultStatus": "affected"
                                            }
                                        }
                                    ]
                                }
                            }
                        ]
                    }
                }
            ]
        }
    },
    "references": {
        "reference_data": [
            {
                "url": "https://git.kernel.org/stable/c/9ec807e7b6f5fcf9499f3baa69f254bb239a847f",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/9ec807e7b6f5fcf9499f3baa69f254bb239a847f"
            },
            {
                "url": "https://git.kernel.org/stable/c/7656372ae190e54e8c8cf1039725a5ea59fdf84a",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/7656372ae190e54e8c8cf1039725a5ea59fdf84a"
            },
            {
                "url": "https://git.kernel.org/stable/c/48a8ccccffbae10c91d31fc872db5c31aba07518",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/48a8ccccffbae10c91d31fc872db5c31aba07518"
            },
            {
                "url": "https://git.kernel.org/stable/c/22a77c0f5b8233237731df3288d067af51a2fd7b",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/22a77c0f5b8233237731df3288d067af51a2fd7b"
            },
            {
                "url": "https://git.kernel.org/stable/c/0e8875de9dad12805ff66e92cd5edea6a421f1cd",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/0e8875de9dad12805ff66e92cd5edea6a421f1cd"
            },
            {
                "url": "https://git.kernel.org/stable/c/e0526ec5360a48ad3ab2e26e802b0532302a7e11",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/e0526ec5360a48ad3ab2e26e802b0532302a7e11"
            },
            {
                "url": "https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html",
                "refsource": "MISC",
                "name": "https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html"
            }
        ]
    },
    "generator": {
        "engine": "bippy-a5840b7849dd"
    }
}