CVE-2026-98751 (GCVE-0-2026-98751)

Vulnerability from cvelistv5 – Published: 2026-10-18 15:47 – Updated: 2026-10-21 12:56
VLAI
Title
tty: abort break signalling on hangup
Summary
In the Linux kernel, the following vulnerability has been resolved: tty: abort break signalling on hangup The break ioctls can race with hangup and end up calling into a tty driver for a device that is already gone or powered down. Drivers must handle this race, but TCSBRK and TCSBRKP should still be aborted to avoid calling back into the driver after a user-controlled timeout (possibly even after the tty has been reopened). Note that drivers should disable any break state on shutdown so just return on hangup (calling break_ctl() again is racy and will most likely fail for drivers handling the race).
Severity
No CVSS data available.
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 7061 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: f34d7a5b7010b82fe97da95496b9971435530062 , < 6c9c9367351a461d62e5c0a39bffdcfbb40f068b (git)
Affected: f34d7a5b7010b82fe97da95496b9971435530062 , < 3bc82999fb85cecc7eb6ec1755ee7d698aa1e783 (git)
Affected: f34d7a5b7010b82fe97da95496b9971435530062 , < 94af6cd832e9b4ce39a8fb59144a8f09ab56fd35 (git)
Affected: f34d7a5b7010b82fe97da95496b9971435530062 , < c8ccd3b2013daaf77b98f8a6724fcf4d2c5c52d6 (git)
Affected: f34d7a5b7010b82fe97da95496b9971435530062 , < 845a2737e0f5ffe5ca8d38de556012b0c9472cdd (git)
guessed Create a notification for this product.
Linux Linux Affected: 2.6.26
Unaffected: 0 , < 2.6.26 (semver)
Unaffected: 6.6.160 , ≤ 6.6.* (semver)
Unaffected: 6.12.113 , ≤ 6.12.* (semver)
Unaffected: 6.18.56 , ≤ 6.18.* (semver)
Unaffected: 7.2.10 , ≤ 7.2.* (semver)
Unaffected: 7.3 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
Show details on NVD website
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{
  "containers": {
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      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/tty/tty_io.c",
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          ],
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          "vendor": "Linux",
          "versions": [
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              "version": "2.6.26"
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              "version": "6.6.160",
              "versionType": "semver"
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              "versionType": "semver"
            },
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              "status": "unaffected",
              "version": "7.3",
              "versionType": "original_commit_for_fix"
            }
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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: abort break signalling on hangup\n\nThe break ioctls can race with hangup and end up calling into a tty\ndriver for a device that is already gone or powered down.\n\nDrivers must handle this race, but TCSBRK and TCSBRKP should still be\naborted to avoid calling back into the driver after a user-controlled\ntimeout (possibly even after the tty has been reopened).\n\nNote that drivers should disable any break state on shutdown so just\nreturn on hangup (calling break_ctl() again is racy and will most likely\nfail for drivers handling the race)."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-21T12:56:26.697Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
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        },
        {
          "url": "https://git.kernel.org/stable/c/845a2737e0f5ffe5ca8d38de556012b0c9472cdd"
        }
      ],
      "title": "tty: abort break signalling on hangup",
      "x_generator": {
        "engine": "bippy-1.2.0"
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    }
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-98751",
    "datePublished": "2026-10-18T15:47:36.026Z",
    "dateReserved": "2026-09-25T10:25:14.368Z",
    "dateUpdated": "2026-10-21T12:56:26.697Z",
    "state": "PUBLISHED"
  },
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      "product_status:known_affected": "1",
      "product_status:under_investigation": "1",
      "source": "Microsoft CSAF VEX",
      "status": "final",
      "title": "tty: abort break signalling on hangup",
      "url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-98751.json",
      "version": "2"
    },
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            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntty: abort break signalling on hangup\n\nThe break ioctls can race with hangup and end up calling into a tty\ndriver for a device that is already gone or powered down.\n\nDrivers must handle this race, but TCSBRK and TCSBRKP should still be\naborted to avoid calling back into the driver after a user-controlled\ntimeout (possibly even after the tty has been reopened).\n\nNote that drivers should disable any break state on shutdown so just\nreturn on hangup (calling break_ctl() again is racy and will most likely\nfail for drivers handling the race)."
          }
        ],
        "id": "CVE-2026-98751",
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  }
}



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