{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.1",
    "cveMetadata": {
        "cveId": "CVE-2024-39508",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2024-06-25T14:23:23.753Z",
        "datePublished": "2024-07-12T12:20:39.607Z",
        "dateUpdated": "2024-09-11T17:32:47.742Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2024-07-15T06:51:00.814Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nio_uring/io-wq: Use set_bit() and test_bit() at worker->flags\n\nUtilize set_bit() and test_bit() on worker->flags within io_uring/io-wq\nto address potential data races.\n\nThe structure io_worker->flags may be accessed through various data\npaths, leading to concurrency issues. When KCSAN is enabled, it reveals\ndata races occurring in io_worker_handle_work and\nio_wq_activate_free_worker functions.\n\n\t BUG: KCSAN: data-race in io_worker_handle_work / io_wq_activate_free_worker\n\t write to 0xffff8885c4246404 of 4 bytes by task 49071 on cpu 28:\n\t io_worker_handle_work (io_uring/io-wq.c:434 io_uring/io-wq.c:569)\n\t io_wq_worker (io_uring/io-wq.c:?)\n<snip>\n\n\t read to 0xffff8885c4246404 of 4 bytes by task 49024 on cpu 5:\n\t io_wq_activate_free_worker (io_uring/io-wq.c:? io_uring/io-wq.c:285)\n\t io_wq_enqueue (io_uring/io-wq.c:947)\n\t io_queue_iowq (io_uring/io_uring.c:524)\n\t io_req_task_submit (io_uring/io_uring.c:1511)\n\t io_handle_tw_list (io_uring/io_uring.c:1198)\n<snip>\n\nLine numbers against commit 18daea77cca6 (\"Merge tag 'for-linus' of\ngit://git.kernel.org/pub/scm/virt/kvm/kvm\").\n\nThese races involve writes and reads to the same memory location by\ndifferent tasks running on different CPUs. To mitigate this, refactor\nthe code to use atomic operations such as set_bit(), test_bit(), and\nclear_bit() instead of basic \"and\" and \"or\" operations. This ensures\nthread-safe manipulation of worker flags.\n\nAlso, move `create_index` to avoid holes in the structure."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "io_uring/io-wq.c"
                    ],
                    "versions": [
                        {
                            "version": "1da177e4c3f4",
                            "lessThan": "ab702c3483db",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "1da177e4c3f4",
                            "lessThan": "1cbb0affb154",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "1da177e4c3f4",
                            "lessThan": "8a565304927f",
                            "status": "affected",
                            "versionType": "git"
                        }
                    ]
                },
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "io_uring/io-wq.c"
                    ],
                    "versions": [
                        {
                            "version": "6.6.35",
                            "lessThanOrEqual": "6.6.*",
                            "status": "unaffected",
                            "versionType": "custom"
                        },
                        {
                            "version": "6.9.6",
                            "lessThanOrEqual": "6.9.*",
                            "status": "unaffected",
                            "versionType": "custom"
                        },
                        {
                            "version": "6.10",
                            "lessThanOrEqual": "*",
                            "status": "unaffected",
                            "versionType": "original_commit_for_fix"
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/ab702c3483db9046bab9f40306f1a28b22dbbdc0"
                },
                {
                    "url": "https://git.kernel.org/stable/c/1cbb0affb15470a9621267fe0a8568007553a4bf"
                },
                {
                    "url": "https://git.kernel.org/stable/c/8a565304927fbd28c9f028c492b5c1714002cbab"
                }
            ],
            "title": "io_uring/io-wq: Use set_bit() and test_bit() at worker->flags",
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                "engine": "bippy-c9c4e1df01b2"
            }
        },
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                    "dateUpdated": "2024-08-02T04:26:15.901Z"
                },
                "title": "CVE Program Container",
                "references": [
                    {
                        "url": "https://git.kernel.org/stable/c/ab702c3483db9046bab9f40306f1a28b22dbbdc0",
                        "tags": [
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                "metrics": [
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                            "type": "ssvc",
                            "content": {
                                "id": "CVE-2024-39508",
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                                    {
                                        "Exploitation": "none"
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