CVE-2018-18386

kernel: Type confusion in drivers/tty/n_tty.c allows for a denial of service

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Severity

Moderate

Red Hat Product Security

3.3

CVSS 3.0

Review impact separately from score.

Published · December 20, 2017

Updated · June 28, 2026

Description

A security flaw was found in the Linux kernel in drivers/tty/n_tty.c which allows local attackers (ones who are able to access pseudo terminals) to lock them up and block further usage of any pseudo terminal devices due to an EXTPROC versus ICANON confusion in TIOCINQ handler.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CVSS 3.0 · 3.3
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

CWE-843 · Access of Resource Using Incompatible Type ('Type Confusion')