CVE-2023-52980 (GCVE-0-2023-52980)
Vulnerability from cvelistv5
Published
2025-03-27 16:43
Modified
2025-05-04 07:46
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: block: ublk: extending queue_size to fix overflow When validating drafted SPDK ublk target, in a case that assigning large queue depth to multiqueue ublk device, ublk target would run into a weird incorrect state. During rounds of review and debug, An overflow bug was found in ublk driver. In ublk_cmd.h, UBLK_MAX_QUEUE_DEPTH is 4096 which means each ublk queue depth can be set as large as 4096. But when setting qd for a ublk device, sizeof(struct ublk_queue) + depth * sizeof(struct ublk_io) will be larger than 65535 if qd is larger than 2728. Then queue_size is overflowed, and ublk_get_queue() references a wrong pointer position. The wrong content of ublk_queue elements will lead to out-of-bounds memory access. Extend queue_size in ublk_device as "unsigned int".
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/29baef789c838bd5c02f50c88adbbc6b955aaf61
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/ee1e3fe4b4579f856997190a00ea4db0307b4332
Impacted products
Vendor Product Version
Linux Linux Version: 71f28f3136aff5890cd56de78abc673f8393cad9
Version: 71f28f3136aff5890cd56de78abc673f8393cad9
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   Linux Linux Version: 6.0
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          "programFiles": [
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nblock: ublk: extending queue_size to fix overflow\n\nWhen validating drafted SPDK ublk target, in a case that\nassigning large queue depth to multiqueue ublk device,\nublk target would run into a weird incorrect state. During\nrounds of review and debug, An overflow bug was found\nin ublk driver.\n\nIn ublk_cmd.h, UBLK_MAX_QUEUE_DEPTH is 4096 which means\neach ublk queue depth can be set as large as 4096. But\nwhen setting qd for a ublk device,\nsizeof(struct ublk_queue) + depth * sizeof(struct ublk_io)\nwill be larger than 65535 if qd is larger than 2728.\nThen queue_size is overflowed, and ublk_get_queue()\nreferences a wrong pointer position. The wrong content of\nublk_queue elements will lead to out-of-bounds memory\naccess.\n\nExtend queue_size in ublk_device as \"unsigned int\"."
        }
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      "providerMetadata": {
        "dateUpdated": "2025-05-04T07:46:45.012Z",
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        "shortName": "Linux"
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      "title": "block: ublk: extending queue_size to fix overflow",
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    "cveId": "CVE-2023-52980",
    "datePublished": "2025-03-27T16:43:19.493Z",
    "dateReserved": "2025-03-27T16:40:15.740Z",
    "dateUpdated": "2025-05-04T07:46:45.012Z",
    "state": "PUBLISHED"
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  }
}


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