CVE-2026-98753 (GCVE-0-2026-98753)
Vulnerability from cvelistv5
Published
2026-10-18 15:47
Modified
2026-10-30 12:39
Severity ?
Summary
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.
References
Impacted products
Vendor Product Version
Linux Linux Version: a9a37ec33a1b3e66b260ac1c29bff0aec8b89ae4
Version: a9a37ec33a1b3e66b260ac1c29bff0aec8b89ae4
Version: a9a37ec33a1b3e66b260ac1c29bff0aec8b89ae4
Version: a9a37ec33a1b3e66b260ac1c29bff0aec8b89ae4
Version: a9a37ec33a1b3e66b260ac1c29bff0aec8b89ae4
Version: a9a37ec33a1b3e66b260ac1c29bff0aec8b89ae4
Version: a9a37ec33a1b3e66b260ac1c29bff0aec8b89ae4
Version: a9a37ec33a1b3e66b260ac1c29bff0aec8b89ae4
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{
  "containers": {
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          "defaultStatus": "unaffected",
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          "programFiles": [
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      "cpeApplicability": [
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntty: tty_port: restore TTY_IO_ERROR on activation failure\n\nMake sure to restore the TTY_IO_ERROR flag if activation fails to\nprevent I/O attempts on a port that is gone or powered down.\n\nThis specifically avoids issues like kernel panic due to unclocked\naccesses or NULL-pointer dereferences when accessing powered down or\nderegistered ports when a TTY ioctl races with hangup and open.\n\nNote that the flag is set again in tty_port_close() but not restoring it\non activation failure leaves a window where drivers fail to handle the\nioctl-hangup race."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-30T12:39:23.712Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
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          "url": "https://git.kernel.org/stable/c/761e8c5eb13d1b5e196b0b39bdfed6fc67af9dd2"
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        {
          "url": "https://git.kernel.org/stable/c/5469dc4153a60289c5bae00215947c6ce09fcc0e"
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          "url": "https://git.kernel.org/stable/c/e24625bff786fa3f22cc38b5038362b910621e83"
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          "url": "https://git.kernel.org/stable/c/34d4f67472ef7a744970b772a8565ddc727788e2"
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          "url": "https://git.kernel.org/stable/c/7021acc84c2e0add77a1a33152e3a1e428fdbfdb"
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          "url": "https://git.kernel.org/stable/c/6388409b711eb91b14fa075a4d861ccc4df1cfe7"
        },
        {
          "url": "https://git.kernel.org/stable/c/56964f6a31238fb41d5830bb42520c5b10ff7d8f"
        }
      ],
      "title": "tty: tty_port: restore TTY_IO_ERROR on activation failure",
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  "cveMetadata": {
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-98753",
    "datePublished": "2026-10-18T15:47:37.700Z",
    "dateReserved": "2026-09-25T10:25:14.368Z",
    "dateUpdated": "2026-10-30T12:39:23.712Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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