CVE-2018-18386

Name: CVE-2018-18386
Creator: NVD / NIST
Published: 2018-10-17T20:29:00.55+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 0.41%

Last modified Jun 17, 2026

CVE-2018-18386 is a vulnerability of currently unknown severity. 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.. EPSS estimates a 0.41% chance of exploitation in the next 30 days.

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.

Metrics

EPSS Probability

0.41%

33.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-704

Affected Software

Vendor	Product	Versions
Linux	Linux Kernel	< 4.14.11
Canonical	Ubuntu Linux	12.04
Canonical	Ubuntu Linux	14.04

References

http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=966031f340185eddd05affcf72b740549f056348Patch, Vendor Advisory
https://access.redhat.com/errata/RHSA-2019:0831
https://bugzilla.suse.com/show_bug.cgi?id=1094825Issue Tracking, Patch, Third Party Advisory
https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.11Patch, Release Notes, Third Party Advisory
https://github.com/torvalds/linux/commit/966031f340185eddd05affcf72b740549f056348Patch, Third Party Advisory
https://usn.ubuntu.com/3849-1/Third Party Advisory
https://usn.ubuntu.com/3849-2/Third Party Advisory
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=966031f340185eddd05affcf72b740549f056348Patch, Vendor Advisory
https://access.redhat.com/errata/RHSA-2019:0831
https://bugzilla.suse.com/show_bug.cgi?id=1094825Issue Tracking, Patch, Third Party Advisory
https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.11Patch, Release Notes, Third Party Advisory
https://github.com/torvalds/linux/commit/966031f340185eddd05affcf72b740549f056348Patch, Third Party Advisory
https://usn.ubuntu.com/3849-1/Third Party Advisory
https://usn.ubuntu.com/3849-2/Third Party Advisory

Timeline

Published: Oct 17, 2018
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2018-18386?

How severe is CVE-2018-18386?

Severity scoring for CVE-2018-18386 is pending analysis. The EPSS model estimates a 0.41% probability of exploitation in the next 30 days.

How do I fix CVE-2018-18386?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2018-18386?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST