{
  "cveId": "CVE-2026-90095",
  "url": "https://patchblox.com/security/cve/CVE-2026-90095",
  "summary": "CVE-2026-90095 is fixed in linux on 1 platform by DEBIAN-CVE-2026-90095 (version 7.2.6-1), released September 23, 2026. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "fuse: Fix the condition to enable over-io-uring",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  fuse: Fix the condition to enable over-io-uring  The existing condition in fuse_uring_cmd() is there only to avoid disabling io-uring for connections that already run with it, missing was a condition to refuse any IORING_OP_URING_CMD if the connection/channel didn\u0027t get enabled because of missing FUSE_INIT reply flag FUSE_OVER_IO_URING. Without the reply flag the barrier in fuse_uring_ready() doesn\u0027t work and IO could already be going on and cause deadlock states (at a minimum one between fch-\u003Ebg_lock and queue-\u003Elock).  The change itself is trivial, but brings behavior change, FUSE_OVER_IO_URING has to be set in the FUSE_INIT_REPLY by fuse servers to accept any IORING_OP_URING_CMD. Libfuse does that and the only non-libfuse implementation I found (fractal-fuse) also does it. Qemu patches for fuse-io-uring are not merged yet, as far as I know.  Moved up is the smp_load_acquire(\u0026fch-\u003Einitialized) check, as a fuse-server implementation might try to setup io-uring before FUSE_INIT is processed and might have gotten -EOPNOTSUPP instead of -EAGAIN.  Also fixed is a stale comment that explains the handling of the FUSE_OVER_IO_URING flag in early RFC versions.  If there should be a report from any library or application we probably need to revert this commit.",
  "published": "2026-09-17T17:17:01Z",
  "severity": "",
  "epss": 0.00206,
  "epssPercentile": 0.10789,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-90095",
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "7.2.6-1",
      "fix": "DEBIAN-CVE-2026-90095",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-90095",
      "released": "2026-09-23T19:19:02Z"
    }
  ],
  "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"
  }
}