{
  "cveId": "CVE-2026-99263",
  "url": "https://patchblox.com/security/cve/CVE-2026-99263",
  "summary": "CVE-2026-99263 is fixed in linux on 1 platform by DEBIAN-CVE-2026-99263 (version 6.12.115-1), released November 3, 2026. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "io_uring/poll: avoid retry wakeup loss when dropping ownership",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  io_uring/poll: avoid retry wakeup loss when dropping ownership  If a wakeup sets IO_POLL_RETRY_FLAG between the owning task consuming the existing instance of IO_POLL_RETRY_FLAG and the loop check of io_poll_check_events(), then we stall on processing the request until an unrelated wakeup comes along.  Using atomic_cmpxchg instead of atomic_sub_return to guarantee both the count v and poll_refs are 0 and no wake-ups are missed.",
  "published": "2026-11-03T12:17:33Z",
  "severity": "Low",
  "cvss": 2.5,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-99263",
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "6.12.115-1",
      "fix": "DEBIAN-CVE-2026-99263",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-99263",
      "released": "2026-11-03T18:58:21Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T00:53:09Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}