CVE-2026-98695

UNKNOWN 0.0

USB: serial: fix ioctl hangup race

CVSS Score

0.0

EPSS Score

0.0%

EPSS Percentile

0th

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.

Vendor	linux
Product	linux
Ecosystems	Linux Kernel
Industries	Technology
Published	Oct 18, 2026

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Affected Versions

Linux / Linux

f34d7a5b7010b82fe97da95496b9971435530062 < ae0da9a5c1ca95c20cc5feffd511ce6eae75924e f34d7a5b7010b82fe97da95496b9971435530062 < 4597ddd6168ae2a4123404e5f0871f1070dc7773 f34d7a5b7010b82fe97da95496b9971435530062 < 7912a95d1345c77d8d63b530b00c118700b78abd f34d7a5b7010b82fe97da95496b9971435530062 < ae0e61d95677efa778379853e495d748e6efbf95

Linux / Linux

2.6.26

References

NVD ↗ CVE.org ↗ EPSS Data ↗

git.kernel.org: https://git.kernel.org/stable/c/ae0da9a5c1ca95c20cc5feffd511ce6eae75924e git.kernel.org: https://git.kernel.org/stable/c/4597ddd6168ae2a4123404e5f0871f1070dc7773 git.kernel.org: https://git.kernel.org/stable/c/7912a95d1345c77d8d63b530b00c118700b78abd git.kernel.org: https://git.kernel.org/stable/c/ae0e61d95677efa778379853e495d748e6efbf95