CVE-2014-0196

The n_tty_write function in drivers/tty/n_tty.c in the Linux kernel through 3.14.3 does not properly manage tty driver access in the "LECHO &…

Browse: All 2014 CVEs · All vendors

CVSS score: 5.5 Medium
CVSS vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CISA KEV: Yes — actively exploited (added 2023-05-12, remediation due 2023-06-02)
Weakness (CWE): CWE-362
Published: 2014-05-07
Last modified: 2026-06-17
NVD status: Analyzed

Description

The n_tty_write function in drivers/tty/n_tty.c in the Linux kernel through 3.14.3 does not properly manage tty driver access in the "LECHO & !OPOST" case, which allows local users to cause a denial of service (memory corruption and system crash) or gain privileges by triggering a race condition involving read and write operations with long strings.

Affected products

linux linux kernel
debian debian linux
redhat enterprise linux
redhat enterprise linux eus
redhat enterprise linux server eus
suse suse linux enterprise desktop
suse suse linux enterprise high availability extension
suse suse linux enterprise server
oracle linux
canonical ubuntu linux
f5 big-ip access policy manager
f5 big-ip advanced firewall manager

Affected ranges per NVD CPE data; confirm exact versions in the vendor advisory.

Required action (CISA)

The impacted product is end-of-life and should be disconnected if still in use. Federal remediation deadline: 2023-06-02.

How to prioritize this

This vulnerability is on the CISA KEV list, meaning it is being actively exploited — treat it as urgent regardless of the raw CVSS number. Use the live CVE lookup for the latest NVD data, and the CVSS 3.1 calculator to model your own environmental score. For the actively exploited vulnerabilities that matter this week, read The Exploit HQ daily security brief.

References

FAQ

Is CVE-2014-0196 actively exploited?

Yes. CISA added CVE-2014-0196 to its Known Exploited Vulnerabilities (KEV) catalog on 2023-05-12, with a federal remediation deadline of 2023-06-02. A KEV listing means real-world exploitation is confirmed, so patching this should be prioritized above many higher-CVSS bugs that aren't being exploited.

What is the CVSS score of CVE-2014-0196?

CVE-2014-0196 has a CVSS base score of 5.5 (Medium). Its vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

Related vulnerabilities

Data source: NVD & CISA KEV. Shown as-is; nothing added. Last generated from NVD data — re-check the live tool for updates.