{
    "data_version": "4.0",
    "data_type": "CVE",
    "data_format": "MITRE",
    "CVE_data_meta": {
        "ID": "CVE-2024-50019",
        "ASSIGNER": "cve@kernel.org",
        "STATE": "PUBLIC"
    },
    "description": {
        "description_data": [
            {
                "lang": "eng",
                "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nkthread: unpark only parked kthread\n\nCalling into kthread unparking unconditionally is mostly harmless when\nthe kthread is already unparked. The wake up is then simply ignored\nbecause the target is not in TASK_PARKED state.\n\nHowever if the kthread is per CPU, the wake up is preceded by a call\nto kthread_bind() which expects the task to be inactive and in\nTASK_PARKED state, which obviously isn't the case if it is unparked.\n\nAs a result, calling kthread_stop() on an unparked per-cpu kthread\ntriggers such a warning:\n\n\tWARNING: CPU: 0 PID: 11 at kernel/kthread.c:525 __kthread_bind_mask kernel/kthread.c:525\n\t <TASK>\n\t kthread_stop+0x17a/0x630 kernel/kthread.c:707\n\t destroy_workqueue+0x136/0xc40 kernel/workqueue.c:5810\n\t wg_destruct+0x1e2/0x2e0 drivers/net/wireguard/device.c:257\n\t netdev_run_todo+0xe1a/0x1000 net/core/dev.c:10693\n\t default_device_exit_batch+0xa14/0xa90 net/core/dev.c:11769\n\t ops_exit_list net/core/net_namespace.c:178 [inline]\n\t cleanup_net+0x89d/0xcc0 net/core/net_namespace.c:640\n\t process_one_work kernel/workqueue.c:3231 [inline]\n\t process_scheduled_works+0xa2c/0x1830 kernel/workqueue.c:3312\n\t worker_thread+0x86d/0xd70 kernel/workqueue.c:3393\n\t kthread+0x2f0/0x390 kernel/kthread.c:389\n\t ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147\n\t ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244\n\t </TASK>\n\nFix this with skipping unecessary unparking while stopping a kthread."
            }
        ]
    },
    "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": "5c25b5ff89f0",
                                            "version_value": "40a6e660d2a3"
                                        },
                                        {
                                            "version_value": "not down converted",
                                            "x_cve_json_5_version_data": {
                                                "versions": [
                                                    {
                                                        "version": "5.11",
                                                        "status": "affected"
                                                    },
                                                    {
                                                        "version": "0",
                                                        "lessThan": "5.11",
                                                        "status": "unaffected",
                                                        "versionType": "custom"
                                                    },
                                                    {
                                                        "version": "5.15.168",
                                                        "lessThanOrEqual": "5.15.*",
                                                        "status": "unaffected",
                                                        "versionType": "custom"
                                                    },
                                                    {
                                                        "version": "6.1.113",
                                                        "lessThanOrEqual": "6.1.*",
                                                        "status": "unaffected",
                                                        "versionType": "custom"
                                                    },
                                                    {
                                                        "version": "6.6.57",
                                                        "lessThanOrEqual": "6.6.*",
                                                        "status": "unaffected",
                                                        "versionType": "custom"
                                                    },
                                                    {
                                                        "version": "6.11.4",
                                                        "lessThanOrEqual": "6.11.*",
                                                        "status": "unaffected",
                                                        "versionType": "custom"
                                                    },
                                                    {
                                                        "version": "6.12-rc3",
                                                        "lessThanOrEqual": "*",
                                                        "status": "unaffected",
                                                        "versionType": "original_commit_for_fix"
                                                    }
                                                ],
                                                "defaultStatus": "affected"
                                            }
                                        }
                                    ]
                                }
                            }
                        ]
                    }
                }
            ]
        }
    },
    "references": {
        "reference_data": [
            {
                "url": "https://git.kernel.org/stable/c/40a6e660d2a3a7a5cb99f0b8ff4fb41bad039f68",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/40a6e660d2a3a7a5cb99f0b8ff4fb41bad039f68"
            },
            {
                "url": "https://git.kernel.org/stable/c/8608196a155cb6cfae04d96b10a2652d0327e33f",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/8608196a155cb6cfae04d96b10a2652d0327e33f"
            },
            {
                "url": "https://git.kernel.org/stable/c/19a5029981c87c2ad0845e713837faa88f5d8e2b",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/19a5029981c87c2ad0845e713837faa88f5d8e2b"
            },
            {
                "url": "https://git.kernel.org/stable/c/cda5423c1a1c906062ef235c940f249b97d9d135",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/cda5423c1a1c906062ef235c940f249b97d9d135"
            },
            {
                "url": "https://git.kernel.org/stable/c/214e01ad4ed7158cab66498810094fac5d09b218",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/214e01ad4ed7158cab66498810094fac5d09b218"
            }
        ]
    },
    "generator": {
        "engine": "bippy-c9c4e1df01b2"
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}