CVE-2018-18386

LOW

Linux Kernel < 4.14.11 - Denial of Service via TIOCINQ EXTPROC/ICANON Confusion

Title source: llm
STIX 2.1

Description

drivers/tty/n_tty.c in the Linux kernel before 4.14.11 allows local attackers (who are able to access pseudo terminals) to hang/block further usage of any pseudo terminal devices due to an EXTPROC versus ICANON confusion in TIOCINQ.

References (7)

Core 7
Core References
Third Party Advisory vendor-advisory x_refsource_ubuntu
https://usn.ubuntu.com/3849-1/
Issue Tracking, Patch, Third Party Advisory x_refsource_misc
https://bugzilla.suse.com/show_bug.cgi?id=1094825
Third Party Advisory vendor-advisory x_refsource_ubuntu
https://usn.ubuntu.com/3849-2/
Patch, Release Notes, Third Party Advisory x_refsource_misc
https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.11
Vendor Advisory vendor-advisory x_refsource_redhat
https://access.redhat.com/errata/RHSA-2019:0831

Scores

CVSS v3 3.3
EPSS 0.0041
EPSS Percentile 32.7%
Attack Vector LOCAL
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

Details

CWE
CWE-704
Status published
Products (3)
canonical/ubuntu_linux 12.04
canonical/ubuntu_linux 14.04
linux/linux_kernel < 4.14.11
Published Oct 17, 2018
Tracked Since Feb 18, 2026