{
  "cveId": "CVE-2023-21400",
  "url": "https://patchblox.com/security/cve/CVE-2023-21400",
  "summary": "CVE-2023-21400 is fixed in linux on 1 platform, first by DEBIAN-CVE-2023-21400, released July 13, 2023. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "linux: In multiple functions  of io_uring.c, there is a possible kernel memory corruption due to improper locking",
  "description": "In multiple functions  of io_uring.c, there is a possible kernel memory corruption due to improper locking. This could lead to local escalation of privilege in the kernel with System execution privileges needed. User interaction is not needed for exploitation.",
  "published": "2023-07-13T00:15:24Z",
  "severity": "medium",
  "cvss": 6.7,
  "cvssVector": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H",
  "epss": 0.00259,
  "epssPercentile": 0.17686,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "5.18.2-1",
      "fix": "DEBIAN-CVE-2023-21400",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2023-21400",
      "released": "2023-07-13T00:15:24Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "5.18.2-1",
      "fix": "DEBIAN-CVE-2023-21400",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2023-21400",
      "released": "2023-07-13T00:15:24Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "5.18.2-1",
      "fix": "DEBIAN-CVE-2023-21400",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2023-21400",
      "released": "2023-07-13T00:15:24Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-09T01:18:40Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}