CVE-2026-98695

Status: ReceivedUnscored—

Severity—Unscored

Exploitation probability0.20 %higher than 9% of CVEs

Active exploitationNonot in the CISA catalog

Public exploitNot knownno public code found

In the Linux kernel, the following vulnerability has been resolved:

USB: serial: fix ioctl hangup race

The tty ioctls can race with hangup and end up calling into a tty driver for a device that is already gone or powered down.

Serialise the callbacks using the tty port mutex and add the missing checks to make sure the port has not been hung up before accessing port driver data or hardware.

This specifically avoids dereferencing a NULL-pointer if a device is disconnected during lengthy break signalling.

Note that TIOCGICOUNT and TIOCMIWAIT do not access port driver data or hardware and are therefore not affected by the race.

CVSS

NVD hasn't assigned a CVSS score to this CVE (common since the April 2026 policy change).

Exploitation probability (EPSS)

Probability of exploitation in the next 30 days: 0.20 %
Percentile among all scored CVEs: 9
Score date: 10/20/2026

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

Affected technologies (1)

⚠ AI-inferred from the description — NVD hasn't analyzed this CVE yet, these aren't verified CPEs.

Linux — Linux Kernel^AI

References

Show 4 references

Raw JSON (NVD)

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{
  "id": "CVE-2026-98695",
  "cveTags": [],
  "metrics": {},
  "affected": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "affectedData": [
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "f34d7a5b7010b82fe97da95496b9971435530062",
              "lessThan": "ae0da9a5c1ca95c20cc5feffd511ce6eae75924e",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "f34d7a5b7010b82fe97da95496b9971435530062",
              "lessThan": "4597ddd6168ae2a4123404e5f0871f1070dc7773",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "f34d7a5b7010b82fe97da95496b9971435530062",
              "lessThan": "7912a95d1345c77d8d63b530b00c118700b78abd",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "f34d7a5b7010b82fe97da95496b9971435530062",
              "lessThan": "ae0e61d95677efa778379853e495d748e6efbf95",
              "versionType": "git"
            }
          ],
          "programFiles": [
            "drivers/usb/serial/generic.c",
            "drivers/usb/serial/usb-serial.c",
            "drivers/usb/serial/xr_serial.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "2.6.26"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "2.6.26",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "6.12.113",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "status": "unaffected",
              "version": "6.18.56",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "status": "unaffected",
              "version": "7.2.10",
              "versionType": "semver",
              "lessThanOrEqual": "7.2.*"
            },
            {
              "status": "unaffected",
              "version": "7.3",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "drivers/usb/serial/generic.c",
            "drivers/usb/serial/usb-serial.c",
            "drivers/usb/serial/xr_serial.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2026-10-18T16:17:22.960",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/4597ddd6168ae2a4123404e5f0871f1070dc7773",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/7912a95d1345c77d8d63b530b00c118700b78abd",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/ae0da9a5c1ca95c20cc5feffd511ce6eae75924e",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/ae0e61d95677efa778379853e495d748e6efbf95",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Received",
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nUSB: serial: fix ioctl hangup race\n\nThe tty ioctls can race with hangup and end up calling into a tty driver\nfor a device that is already gone or powered down.\n\nSerialise the callbacks using the tty port mutex and add the missing\nchecks to make sure the port has not been hung up before accessing port\ndriver data or hardware.\n\nThis specifically avoids dereferencing a NULL-pointer if a device is\ndisconnected during lengthy break signalling.\n\nNote that TIOCGICOUNT and TIOCMIWAIT do not access port driver data or\nhardware and are therefore not affected by the race."
    }
  ],
  "lastModified": "2026-10-19T10:19:33.853",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}