{
  "cveId": "CVE-2026-80548",
  "url": "https://patchblox.com/security/cve/CVE-2026-80548",
  "summary": "CVE-2026-80548 is fixed in 2 products on 1 platform, first by DEBIAN-CVE-2026-80548, released August 27, 2026. It is not reported as exploited. Patch Radar priority: High.",
  "title": "linux: In the Linux kernel, the following vulnerability has been resolved:  s390/vfio_ccw: Selectively expand io_mutex  The...",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  s390/vfio_ccw: Selectively expand io_mutex  The io_mutex was defined to serialize the io_regions, but then has also sort of been associated with the I/O themselves because of the close relationship they share.  With the handful of races that are possible, the choices are either to:  A) expand the scope of io_mutex to close these remaining windows, or  B) reduce the scope of io_mutex to just io_region, and introduce a new     lock mechanism for the remaining I/O resources  This patch implements A, since B brings with it a lot more interactions that would need to be tracked and kept in a correct hierarchy. It also takes advantage of the workqueue element for cp_free() that now gets called out of fsm_notoper(), which could be invoked out of an interrupt context and thus cannot acquire a mutex itself.",
  "published": "2026-08-26T15:17:09Z",
  "severity": "high",
  "cvss": 8.8,
  "cvssVector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H",
  "epss": 0.00129,
  "epssPercentile": 0.02588,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "6.1.187-1",
      "fix": "DEBIAN-CVE-2026-80548",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-80548",
      "released": "2026-08-27T00:27:02Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "6.12.105-1",
      "fix": "DEBIAN-CVE-2026-80548",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-80548",
      "released": "2026-08-27T00:27:02Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "7.1.10-1",
      "fix": "DEBIAN-CVE-2026-80548",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-80548",
      "released": "2026-08-27T00:27:02Z"
    },
    {
      "platform": "linux",
      "product": "linux-6.12",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "6.12.107-1~deb12u1",
      "fix": "DEBIAN-CVE-2026-80548",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-80548",
      "released": "2026-08-27T00:27:02Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T19:12:23Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}