CVE-2014-0196

What it is

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.

At a glance

Exploitability

Can be exploited locally on the machine with a low-privilege account. High risk of service disruption.

In the wild

CISA lists this as exploited in real attacks. Treat as urgent.

Fix

A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

1. 2013-12-03 00:00 UTC ReservedThe CVE id was reserved by its CNA
2. 2014-05-07 10:55 UTC PublishedDisclosed publicly on CVE.org and NVD
3. 2023-05-12 Exploited in the wildAdded to CISA's Known Exploited Vulnerabilities list
4. 2023-06-02 Remediation deadlineCISA's due date for federal agencies to fix it
5. 2026-06-17 00:02 UTC Last updatedMost recent change to the record

Why it ranks here

• Exploited in the wild: yes, CISA lists it. This puts it above everything that is not.
• Exploit odds: 20.3% in the next 30 days (EPSS).
• Severity: 5.5 MEDIUM (CVSS).
• Fix: a patch or advisory is linked.

Details

Published

2014-05-07 10:55 UTC

Last modified

2026-06-17 00:02 UTC

Added to CISA KEV

2023-05-12

Exploit probability

20.3% · EPSS, next 30 days

Weakness

CWE-362 · Race condition

Record status

Analyzed

Affected

• Linux Kernel < 3.2.59
• Linux Kernel < 3.4.91
• Linux Kernel < 3.10.40
• Linux Kernel < 3.12.20
• Linux Kernel < 3.14.4
• Linux Kernel 2.6.31
• Debian Linux 6.0
• Debian Linux 7.0

Attack profile CVSS 3.1 · 5.5

Attack vector

Local

Complexity

Low

Privileges needed

Low

User interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2014-0196.md and follow it. Check whether this project is affected by CVE-2014-0196. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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