CVE-2026-98695
Published Oct 18, 2026
Description
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.
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References
Other References
Frequently Asked Questions
What is CVE-2026-98695? +
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.
How do I check if I'm vulnerable to CVE-2026-98695? +
You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.