{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "a9a37ec33a1b3e66b260ac1c29bff0aec8b89ae4"
            },
            {
              "fixed": "34d4f67472ef7a744970b772a8565ddc727788e2"
            },
            {
              "fixed": "7021acc84c2e0add77a1a33152e3a1e428fdbfdb"
            },
            {
              "fixed": "6388409b711eb91b14fa075a4d861ccc4df1cfe7"
            },
            {
              "fixed": "56964f6a31238fb41d5830bb42520c5b10ff7d8f"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "2.6.33"
            },
            {
              "fixed": "6.12.113"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.56"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.2.10"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98753.json"
  },
  "details": "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.",
  "id": "CVE-2026-98753",
  "modified": "2026-10-19T02:30:32.121043195Z",
  "published": "2026-10-18T15:47:37.700Z",
  "references": [
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/34d4f67472ef7a744970b772a8565ddc727788e2"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/56964f6a31238fb41d5830bb42520c5b10ff7d8f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6388409b711eb91b14fa075a4d861ccc4df1cfe7"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7021acc84c2e0add77a1a33152e3a1e428fdbfdb"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98753.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-98753"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "tty: tty_port: restore TTY_IO_ERROR on activation failure"
}