{
  "cveId": "CVE-2022-50307",
  "url": "https://patchblox.com/security/cve/CVE-2022-50307",
  "summary": "CVE-2022-50307 is fixed in linux on 1 platform, first by DEBIAN-CVE-2022-50307, released September 15, 2025. It is not reported as exploited. Patch Radar priority: High.",
  "title": "linux: In the Linux kernel, the following vulnerability has been resolved:  s390/cio: fix out-of-bounds access on cio_ignore...",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  s390/cio: fix out-of-bounds access on cio_ignore free  The channel-subsystem-driver scans for newly available devices whenever device-IDs are removed from the cio_ignore list using a command such as:    echo free \u003E/proc/cio_ignore  Since an I/O device scan might interfer with running I/Os, commit 172da89ed0ea (\u0022s390/cio: avoid excessive path-verification requests\u0022) introduced an optimization to exclude online devices from the scan.  The newly added check for online devices incorrectly assumes that an I/O-subchannel\u0027s drvdata points to a struct io_subchannel_private. For devices that are bound to a non-default I/O subchannel driver, such as the vfio_ccw driver, this results in an out-of-bounds read access during each scan.  Fix this by changing the scan logic to rely on a driver-independent online indication. For this we can use struct subchannel-\u003Econfig.ena, which is the driver\u0027s requested subchannel-enabled state. Since I/Os can only be started on enabled subchannels, this matches the intent of the original optimization of not scanning devices where I/O might be running.",
  "published": "2025-09-15T15:15:42Z",
  "severity": "high",
  "cvss": 7.1,
  "cvssVector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H",
  "epss": 0.00161,
  "epssPercentile": 0.05317,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "6.0.7-1",
      "fix": "DEBIAN-CVE-2022-50307",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2022-50307",
      "released": "2025-09-15T15:15:42Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "6.0.7-1",
      "fix": "DEBIAN-CVE-2022-50307",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2022-50307",
      "released": "2025-09-15T15:15:42Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "6.0.7-1",
      "fix": "DEBIAN-CVE-2022-50307",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2022-50307",
      "released": "2025-09-15T15:15:42Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T06:59:42Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}