CVE-2024-58000 (GCVE-0-2024-58000)
Vulnerability from cvelistv5
Published
2025-02-27 02:07
Modified
2025-05-04 10:08
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: io_uring: prevent reg-wait speculations With *ENTER_EXT_ARG_REG instead of passing a user pointer with arguments for the waiting loop the user can specify an offset into a pre-mapped region of memory, in which case the [offset, offset + sizeof(io_uring_reg_wait)) will be intepreted as the argument. As we address a kernel array using a user given index, it'd be a subject to speculation type of exploits. Use array_index_nospec() to prevent that. Make sure to pass not the full region size but truncate by the maximum offset allowed considering the structure size.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/29b95ac917927ce9f95bf38797e16333ecb489b1
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/2a6de94df7bfa76d9850443547e7b3333f63a16a
Impacted products
Vendor Product Version
Linux Linux Version: aa00f67adc2c0d6439f81b5a81ff181377c47a7e
Version: aa00f67adc2c0d6439f81b5a81ff181377c47a7e
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   Linux Linux Version: 6.13
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{
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      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "io_uring/io_uring.c"
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nio_uring: prevent reg-wait speculations\n\nWith *ENTER_EXT_ARG_REG instead of passing a user pointer with arguments\nfor the waiting loop the user can specify an offset into a pre-mapped\nregion of memory, in which case the\n[offset, offset + sizeof(io_uring_reg_wait)) will be intepreted as the\nargument.\n\nAs we address a kernel array using a user given index, it\u0027d be a subject\nto speculation type of exploits. Use array_index_nospec() to prevent\nthat. Make sure to pass not the full region size but truncate by the\nmaximum offset allowed considering the structure size."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-05-04T10:08:06.384Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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        {
          "url": "https://git.kernel.org/stable/c/29b95ac917927ce9f95bf38797e16333ecb489b1"
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      ],
      "title": "io_uring: prevent reg-wait speculations",
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2024-58000",
    "datePublished": "2025-02-27T02:07:19.155Z",
    "dateReserved": "2025-02-27T02:04:28.915Z",
    "dateUpdated": "2025-05-04T10:08:06.384Z",
    "state": "PUBLISHED"
  },
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  }
}


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