{
  "cveId": "CVE-2026-98753",
  "url": "https://patchblox.com/security/cve/CVE-2026-98753",
  "summary": "CVE-2026-98753 is fixed in 39 products on 1 platform, first by DEBIAN-CVE-2026-98753, released October 19, 2026. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "tty: tty_port: restore TTY_IO_ERROR on activation failure",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  tty: tty_port: restore TTY_IO_ERROR on activation failure  Make sure to restore the TTY_IO_ERROR flag if activation fails to prevent I/O attempts on a port that is gone or powered down.  This specifically avoids issues like kernel panic due to unclocked accesses or NULL-pointer dereferences when accessing powered down or deregistered ports when a TTY ioctl races with hangup and open.  Note that the flag is set again in tty_port_close() but not restoring it on activation failure leaves a window where drivers fail to handle the ioctl-hangup race.",
  "published": "2026-10-18T16:17:29Z",
  "severity": "Moderate",
  "cvss": 4.7,
  "epss": 0.00176,
  "epssPercentile": 0.07197,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-98753",
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  ],
  "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"
  }
}