CVE-2026-98695
Received
Received - Intake
USB Serial Driver Race Condition Fix
Vulnerability report for CVE-2026-98695, including description, CVSS score, EPSS score, affected products, exploitability, helpful resources, and attack-flow context.
Publication date: 2026-10-18
Last updated on: 2026-10-18
Assigner: kernel.org
Description
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.
CVSS Scores
EPSS Scores
| Probability: | |
| Percentile: |
Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| Linux | Linux | f34d7a5b7010b82fe97da95496b9971435530062 |
| Linux | Linux | f34d7a5b7010b82fe97da95496b9971435530062 |
| Linux | Linux | f34d7a5b7010b82fe97da95496b9971435530062 |
| Linux | Linux | f34d7a5b7010b82fe97da95496b9971435530062 |
| Linux | Linux | 2.6.26 |
Helpful Resources
Exploitability
CWE
KEV
| CWE ID | Description |
|---|---|
| CWE-UNKNOWN |
