--- title: "CVE-2014-0196: The n_tty_write function… | CubePath" 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\"…" language: en source: https://cubepath.com/security/cve/CVE-2014-0196 --- # CVE-2014-0196: The n_tty_write function… | CubePath ## 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. Official description from the CVE record, published by redhat. Copyright © 1999-2026 The MITRE Corporation. See [/security/cve/legal](https://cubepath.com/security/cve/legal) for the CVE license. [View the record on cve.org](https://www.cve.org/CVERecord?id=CVE-2014-0196) ## Key data ### CVSS 3.1 Medium 5.5 Score published by CISA-ADP in the CVE record. CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H | Metric | Value | What it means | | ---------------------- | --------- | ----------------------------------------------------------------------------------------- | | Attack vector | Local | The attacker needs local access to the system, or to trick a user into running something. | | Attack complexity | Low | No special conditions are needed. The attack can be repeated at will. | | Privileges required | Low | A basic user account is needed. | | User interaction | None | No action from any user is needed. | | Scope | Unchanged | The impact stays within the vulnerable component. | | Confidentiality impact | None | No effect on the secrecy of data. | | Integrity impact | None | No effect on the trustworthiness of data. | | Availability impact | High | Serious or total effect on availability. | CVSS is owned and managed by FIRST.Org, Inc. (FIRST) and is used by permission. Each CVSS score on this site is shown together with its vector string, as published in the CVE record by the source named next to it. Learn more at [first.org/cvss](https://www.first.org/cvss/) . ### EPSS Exploit Prediction Scoring System by FIRST: an estimate of the probability that exploitation activity will be observed in the next 30 days. Score 0.20329 (20.3% probability) Percentile 97.5% Scores of Nov 10, 2026 Model v2026.06.15 ### CISA Known Exploited Vulnerabilities This CVE is listed in the CISA KEV catalog. Name in the catalog Linux Kernel Race Condition Vulnerability Added to the catalog May 12, 2023 Federal due date Jun 2, 2023 ### CISA assessment as of Feb 7, 2025 Stakeholder-Specific Vulnerability Categorization (SSVC) decision points added by CISA. Exploitation Recorded by CISA as active Automatable no Technical impact partial ### Weakness (CWE) CWE catalog version 5.0. CWE names: Copyright © 2006-2026, The MITRE Corporation. See [/security/cve/legal](https://cubepath.com/security/cve/legal) for the CWE license. - [CWE-362](https://cwe.mitre.org/data/definitions/362.html) Concurrent Execution using Shared Resource with Improper Synchronization ## References Links listed in the CVE record. They lead to other sites, which CubePath does not control. - [USN-2203-1](http://www.ubuntu.com/usn/USN-2203-1) (ubuntu.com) vendor-advisory - [support.f5.com/kb/en-us/solutions/public/15000/300/sol15319…](http://support.f5.com/kb/en-us/solutions/public/15000/300/sol15319.html) - [106646](http://www.osvdb.org/106646) (osvdb.org) vdb-entry - [SUSE-SU-2014:0683](http://lists.opensuse.org/opensuse-security-announce/2014-05/msg00012.html) (lists.opensuse.org) vendor-advisory - [\[oss-security\] 20140429 CVE-2014-0196: Linux kernel pty layer race condition memory corruption](http://www.openwall.com/lists/oss-security/2014/05/05/6) (openwall.com) mailing-list - [59262](http://secunia.com/advisories/59262) (secunia.com) third-party-advisory - [USN-2204-1](http://www.ubuntu.com/usn/USN-2204-1) (ubuntu.com) vendor-advisory - [59218](http://secunia.com/advisories/59218) (secunia.com) third-party-advisory - [USN-2202-1](http://www.ubuntu.com/usn/USN-2202-1) (ubuntu.com) vendor-advisory - [33516](http://www.exploit-db.com/exploits/33516) (exploit-db.com) exploit - [DSA-2928](http://www.debian.org/security/2014/dsa-2928) (debian.org) vendor-advisory - [USN-2199-1](http://www.ubuntu.com/usn/USN-2199-1) (ubuntu.com) vendor-advisory - [linux.oracle.com/errata/ELSA-2014-0771.html](http://linux.oracle.com/errata/ELSA-2014-0771.html) - [bugzilla.redhat.com/show\_bug.cgi?id=1094232](https://bugzilla.redhat.com/show%5Fbug.cgi?id=1094232) - [USN-2197-1](http://www.ubuntu.com/usn/USN-2197-1) (ubuntu.com) vendor-advisory - [source.android.com/security/bulletin/2016-07-01.html](http://source.android.com/security/bulletin/2016-07-01.html) - [RHSA-2014:0512](http://rhn.redhat.com/errata/RHSA-2014-0512.html) (rhn.redhat.com) vendor-advisory - [59599](http://secunia.com/advisories/59599) (secunia.com) third-party-advisory - [DSA-2926](http://www.debian.org/security/2014/dsa-2926) (debian.org) vendor-advisory - [github.com/torvalds/linux/commit/4291086b1f081b869c6d79e5b7…](https://github.com/torvalds/linux/commit/4291086b1f081b869c6d79e5b7441633dc3ace00) - [SUSE-SU-2014:0667](http://lists.opensuse.org/opensuse-security-announce/2014-05/msg00007.html) (lists.opensuse.org) vendor-advisory - [pastebin.com/raw.php?i=yTSFUBgZ](http://pastebin.com/raw.php?i=yTSFUBgZ) - [git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3…](http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=4291086b1f081b869c6d79e5b7441633dc3ace00) - [bugzilla.novell.com/show\_bug.cgi?id=875690](http://bugzilla.novell.com/show%5Fbug.cgi?id=875690) - [USN-2198-1](http://www.ubuntu.com/usn/USN-2198-1) (ubuntu.com) vendor-advisory - [USN-2200-1](http://www.ubuntu.com/usn/USN-2200-1) (ubuntu.com) vendor-advisory - [USN-2201-1](http://www.ubuntu.com/usn/USN-2201-1) (ubuntu.com) vendor-advisory - [USN-2196-1](http://www.ubuntu.com/usn/USN-2196-1) (ubuntu.com) vendor-advisory ## Timeline 1. ID reserved Dec 3, 2013 2. Record published May 7, 2014 3. Added to CISA KEV May 12, 2023 4. Record last updated Oct 22, 2025 ## Look up another CVE ## About CubePath CubePath is a cloud provider with data centers in Europe and the United States. It offers VPS, bare metal servers and DDoS protection. [Cloud VPS](https://cubepath.com/vps) [DDoS protection](https://cubepath.com/ddos-protection) Data from the CVE Program (MITRE), CISA KEV and FIRST EPSS. CVSS is owned by FIRST and used by permission. Not affiliated with or endorsed by MITRE, CISA or FIRST. Data as of Nov 10, 2026, 19:25 UTC. [Sources and licenses](https://cubepath.com/security/cve/legal)