{
  "cveId": "CVE-2023-23586",
  "url": "https://patchblox.com/security/cve/CVE-2023-23586",
  "summary": "CVE-2023-23586 is fixed in linux on 1 platform, first by DEBIAN-CVE-2023-23586, released February 17, 2023. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "linux: Due to a vulnerability in the io_uring subsystem, it is possible to leak kernel memory information to the user proces...",
  "description": "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\u0027s io_worker threads, thus it is possible to insert a time namespace\u0027s vvar page to process\u0027s memory space via a page fault. When this time namespace is destroyed, the vvar page is also freed, but not removed from the process\u0027 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",
  "published": "2023-02-17T13:15:10Z",
  "severity": "medium",
  "cvss": 5.5,
  "cvssVector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N",
  "epss": 0.00268,
  "epssPercentile": 0.18983,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "5.14.6-1",
      "fix": "DEBIAN-CVE-2023-23586",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2023-23586",
      "released": "2023-02-17T13:15:10Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "5.14.6-1",
      "fix": "DEBIAN-CVE-2023-23586",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2023-23586",
      "released": "2023-02-17T13:15:10Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "5.14.6-1",
      "fix": "DEBIAN-CVE-2023-23586",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2023-23586",
      "released": "2023-02-17T13:15:10Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T13:06:02Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}