FKIE_CVE-2026-98753

Vulnerability from fkie_nvd - Published: 2026-10-18 16:17 - Updated: 2026-10-30 13:21
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
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/16032c980d8f71642fcdc99309c571df3fcf3328
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/34d4f67472ef7a744970b772a8565ddc727788e2
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/5469dc4153a60289c5bae00215947c6ce09fcc0e
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/56964f6a31238fb41d5830bb42520c5b10ff7d8f
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/6388409b711eb91b14fa075a4d861ccc4df1cfe7
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/7021acc84c2e0add77a1a33152e3a1e428fdbfdb
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/761e8c5eb13d1b5e196b0b39bdfed6fc67af9dd2
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e24625bff786fa3f22cc38b5038362b910621e83
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/tty/tty_port.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "761e8c5eb13d1b5e196b0b39bdfed6fc67af9dd2",
              "status": "affected",
              "version": "a9a37ec33a1b3e66b260ac1c29bff0aec8b89ae4",
              "versionType": "git"
            },
            {
              "lessThan": "5469dc4153a60289c5bae00215947c6ce09fcc0e",
              "status": "affected",
              "version": "a9a37ec33a1b3e66b260ac1c29bff0aec8b89ae4",
              "versionType": "git"
            },
            {
              "lessThan": "e24625bff786fa3f22cc38b5038362b910621e83",
              "status": "affected",
              "version": "a9a37ec33a1b3e66b260ac1c29bff0aec8b89ae4",
              "versionType": "git"
            },
            {
              "lessThan": "16032c980d8f71642fcdc99309c571df3fcf3328",
              "status": "affected",
              "version": "a9a37ec33a1b3e66b260ac1c29bff0aec8b89ae4",
              "versionType": "git"
            },
            {
              "lessThan": "34d4f67472ef7a744970b772a8565ddc727788e2",
              "status": "affected",
              "version": "a9a37ec33a1b3e66b260ac1c29bff0aec8b89ae4",
              "versionType": "git"
            },
            {
              "lessThan": "7021acc84c2e0add77a1a33152e3a1e428fdbfdb",
              "status": "affected",
              "version": "a9a37ec33a1b3e66b260ac1c29bff0aec8b89ae4",
              "versionType": "git"
            },
            {
              "lessThan": "6388409b711eb91b14fa075a4d861ccc4df1cfe7",
              "status": "affected",
              "version": "a9a37ec33a1b3e66b260ac1c29bff0aec8b89ae4",
              "versionType": "git"
            },
            {
              "lessThan": "56964f6a31238fb41d5830bb42520c5b10ff7d8f",
              "status": "affected",
              "version": "a9a37ec33a1b3e66b260ac1c29bff0aec8b89ae4",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/tty/tty_port.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "2.6.33"
            },
            {
              "lessThan": "2.6.33",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.273",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.224",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.191",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.160",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.113",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.56",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.10",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "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."
    }
  ],
  "id": "CVE-2026-98753",
  "lastModified": "2026-10-30T13:21:24.277",
  "metrics": {},
  "published": "2026-10-18T16:17:29.103",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/16032c980d8f71642fcdc99309c571df3fcf3328"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/34d4f67472ef7a744970b772a8565ddc727788e2"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/5469dc4153a60289c5bae00215947c6ce09fcc0e"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/56964f6a31238fb41d5830bb42520c5b10ff7d8f"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/6388409b711eb91b14fa075a4d861ccc4df1cfe7"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/7021acc84c2e0add77a1a33152e3a1e428fdbfdb"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/761e8c5eb13d1b5e196b0b39bdfed6fc67af9dd2"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/e24625bff786fa3f22cc38b5038362b910621e83"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



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