FKIE_CVE-2026-98695

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: 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.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/24d6edb6bd7f7a9e6cee2f8fe435781daab8aa0f
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/3a728adbed9fd822f99a9d9c5ebad5c3b565ba4a
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/4597ddd6168ae2a4123404e5f0871f1070dc7773
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/7912a95d1345c77d8d63b530b00c118700b78abd
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/98f0a25134bfce44ebd1db0341fa0e8603ff276d
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/ae0da9a5c1ca95c20cc5feffd511ce6eae75924e
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/ae0e61d95677efa778379853e495d748e6efbf95
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c7ef25e96dc3f808eb891bbbd43b6a682846eb0c
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/usb/serial/generic.c",
            "drivers/usb/serial/usb-serial.c",
            "drivers/usb/serial/xr_serial.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "c7ef25e96dc3f808eb891bbbd43b6a682846eb0c",
              "status": "affected",
              "version": "f34d7a5b7010b82fe97da95496b9971435530062",
              "versionType": "git"
            },
            {
              "lessThan": "98f0a25134bfce44ebd1db0341fa0e8603ff276d",
              "status": "affected",
              "version": "f34d7a5b7010b82fe97da95496b9971435530062",
              "versionType": "git"
            },
            {
              "lessThan": "3a728adbed9fd822f99a9d9c5ebad5c3b565ba4a",
              "status": "affected",
              "version": "f34d7a5b7010b82fe97da95496b9971435530062",
              "versionType": "git"
            },
            {
              "lessThan": "24d6edb6bd7f7a9e6cee2f8fe435781daab8aa0f",
              "status": "affected",
              "version": "f34d7a5b7010b82fe97da95496b9971435530062",
              "versionType": "git"
            },
            {
              "lessThan": "ae0da9a5c1ca95c20cc5feffd511ce6eae75924e",
              "status": "affected",
              "version": "f34d7a5b7010b82fe97da95496b9971435530062",
              "versionType": "git"
            },
            {
              "lessThan": "4597ddd6168ae2a4123404e5f0871f1070dc7773",
              "status": "affected",
              "version": "f34d7a5b7010b82fe97da95496b9971435530062",
              "versionType": "git"
            },
            {
              "lessThan": "7912a95d1345c77d8d63b530b00c118700b78abd",
              "status": "affected",
              "version": "f34d7a5b7010b82fe97da95496b9971435530062",
              "versionType": "git"
            },
            {
              "lessThan": "ae0e61d95677efa778379853e495d748e6efbf95",
              "status": "affected",
              "version": "f34d7a5b7010b82fe97da95496b9971435530062",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/usb/serial/generic.c",
            "drivers/usb/serial/usb-serial.c",
            "drivers/usb/serial/xr_serial.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "2.6.26"
            },
            {
              "lessThan": "2.6.26",
              "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\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."
    }
  ],
  "id": "CVE-2026-98695",
  "lastModified": "2026-10-30T13:21:18.557",
  "metrics": {},
  "published": "2026-10-18T16:17:22.960",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/24d6edb6bd7f7a9e6cee2f8fe435781daab8aa0f"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/3a728adbed9fd822f99a9d9c5ebad5c3b565ba4a"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "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/98f0a25134bfce44ebd1db0341fa0e8603ff276d"
    },
    {
      "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",
      "url": "https://git.kernel.org/stable/c/c7ef25e96dc3f808eb891bbbd43b6a682846eb0c"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



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