{
  "id": "CVE-2023-23586",
  "sourceIdentifier": "cve-coordination@google.com",
  "published": "2023-02-17T13:15:10.737",
  "lastModified": "2023-11-07T04:07:47.083",
  "vulnStatus": "Modified",
  "descriptions": [
    {
      "lang": "en",
      "value": "Due to a vulnerability in the io_uring subsystem, it is possible to leak kernel memory information to the user process.\u00a0timens_install calls current_is_single_threaded to determine if the current process is single-threaded, but this call does not consider io_uring's io_worker threads, thus it is possible to insert a time namespace's vvar page to process's memory space via a page fault. When this time namespace is destroyed, the vvar page is also freed, but not removed from the process' memory, and a next page allocated by the kernel will be still available from the user-space process and can leak memory contents via this (read-only) use-after-free vulnerability. We recommend upgrading past version 5.10.161 or commit\u00a0 788d0824269bef539fe31a785b1517882eafed93 https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/io_uring \n"
    }
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          "attackVector": "LOCAL",
          "attackComplexity": "LOW",
          "privilegesRequired": "LOW",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "NONE",
          "availabilityImpact": "NONE",
          "baseScore": 5.5,
          "baseSeverity": "MEDIUM"
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        "exploitabilityScore": 1.8,
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          "integrityImpact": "NONE",
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      "source": "nvd@nist.gov",
      "type": "Primary",
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          "value": "CWE-416"
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          "cpeMatch": [
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              "vulnerable": true,
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      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/io_uring?h=linux-5.10.y&id=788d0824269bef539fe31a785b1517882eafed93",
      "source": "cve-coordination@google.com",
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      "url": "https://kernel.dance/#788d0824269bef539fe31a785b1517882eafed93",
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}