CVE-2014-0196

Exp

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.

Published: 2014-05-07 Last update: 2026-04-21 Assigner: [email protected] Source: [email protected]
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2014-0196 is rated Critical Active Threat (83.3/100): CVSS Medium severity, with high exploitation likelihood (EPSS 49.91%, 98th percentile). CISA KEV confirms active exploitation (added 2023-05-12) affecting Linux / Kernel. a weakness (CWE-362) Unauthenticated remote administrative access may be possible. EPSS rose +2.07% over the last day, indicating growing attacker interest. The CISA remediation deadline has passed—treat as an emergency patch priority.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

CISA KEV Record for CVE-2014-0196

Name: Linux Kernel Race Condition Vulnerability · CISA KEV detail

Exploit added: 2023-05-12

Action due: 2023-06-02

Required action: The impacted product is end-of-life and should be disconnected if still in use.

Public exploit references (Exploit-DB) for CVE-2014-0196

EDB-ID Source Kind Published Link
33516 exploit_db edb 2014-05-26 Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2014-0196

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-05-21 47.84% 49.91% +2.07%
2 2026-05-20 49.31% 47.84% -1.47%
3 2026-05-19 — 49.31% —

Full EPSS history (31 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2014-0196

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.5 3.1 MEDIUM
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Click to expand
Attack vector (AV:L)
They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 1.8 3.6 134c704f-9b21-4f2e-91b3-4a467353bcc0
6.9 2.0 MEDIUM
AV:L/AC:M/Au:N/C:C/I:C/A:C Click to expand
Access vector (AV:L)
Requires local access to the target system.
Access complexity (AC:M)
Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:C)
Complete confidentiality impact.
Integrity impact (I:C)
Complete integrity impact.
Availability impact (A:C)
Complete availability impact.
 3.4 10.0 [email protected]

Weakness enumeration for CVE-2014-0196

OS Trackers for CVE-2014-0196

vendor priority summary link
debian not yet assigned CVE-2014-0196 not yet assigned priority: Debian including 1 source packages (linux), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2014-0196
redhat high — https://access.redhat.com/security/cve/CVE-2014-0196
ubuntu critical CVE-2014-0196 critical priority: Ubuntu including 30 source packages (linux, linux-armadaxp, …), 314 status rows across 12 suites (lucid, precise, quantal, saucy, trusty, upstream, utopic, vivid, wily, xenial, yakkety, zesty): DNE 217, released 43, not-affected 35, ignored 19. https://ubuntu.com/security/CVE-2014-0196

Affected software / configurations for CVE-2014-0196

Vendor Product Version Raw CPE
linux linux_kernel > 2.6.31, < 3.2.59 cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linux linux_kernel >= 3.3, < 3.4.91 cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linux linux_kernel >= 3.5, < 3.10.40 cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linux linux_kernel >= 3.11, < 3.12.20 cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linux linux_kernel >= 3.13, < 3.14.4 cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linux linux_kernel 2.6.31 cpe:2.3:o:linux:linux_kernel:2.6.31:-:*:*:*:*:*:*
linux linux_kernel 2.6.31 cpe:2.3:o:linux:linux_kernel:2.6.31:rc3:*:*:*:*:*:*
linux linux_kernel 2.6.31 cpe:2.3:o:linux:linux_kernel:2.6.31:rc4:*:*:*:*:*:*
linux linux_kernel 2.6.31 cpe:2.3:o:linux:linux_kernel:2.6.31:rc5:*:*:*:*:*:*
linux linux_kernel 2.6.31 cpe:2.3:o:linux:linux_kernel:2.6.31:rc6:*:*:*:*:*:*
linux linux_kernel 2.6.31 cpe:2.3:o:linux:linux_kernel:2.6.31:rc7:*:*:*:*:*:*
linux linux_kernel 2.6.31 cpe:2.3:o:linux:linux_kernel:2.6.31:rc8:*:*:*:*:*:*
linux linux_kernel 2.6.31 cpe:2.3:o:linux:linux_kernel:2.6.31:rc9:*:*:*:*:*:*
debian debian_linux 6.0 cpe:2.3:o:debian:debian_linux:6.0:*:*:*:*:*:*:*
debian debian_linux 7.0 cpe:2.3:o:debian:debian_linux:7.0:*:*:*:*:*:*:*
redhat enterprise_linux 6.0 cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:*
redhat enterprise_linux_eus 6.3 cpe:2.3:o:redhat:enterprise_linux_eus:6.3:*:*:*:*:*:*:*
redhat enterprise_linux_eus 6.4 cpe:2.3:o:redhat:enterprise_linux_eus:6.4:*:*:*:*:*:*:*
redhat enterprise_linux_server_eus 6.3 cpe:2.3:o:redhat:enterprise_linux_server_eus:6.3:*:*:*:*:*:*:*
suse suse_linux_enterprise_desktop 11 cpe:2.3:o:suse:suse_linux_enterprise_desktop:11:sp3:*:*:*:-:*:*
suse suse_linux_enterprise_high_availability_extension 11 cpe:2.3:o:suse:suse_linux_enterprise_high_availability_extension:11:sp3:*:*:*:*:*:*
suse suse_linux_enterprise_server 11 cpe:2.3:o:suse:suse_linux_enterprise_server:11:sp3:*:*:*:-:*:*
suse suse_linux_enterprise_server 11 cpe:2.3:o:suse:suse_linux_enterprise_server:11:sp3:*:*:*:vmware:*:*
oracle linux 6 cpe:2.3:o:oracle:linux:6:-:*:*:*:*:*:*
canonical ubuntu_linux 10.04 cpe:2.3:o:canonical:ubuntu_linux:10.04:*:*:*:-:*:*:*
canonical ubuntu_linux 12.04 cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:esm:*:*:*
canonical ubuntu_linux 12.10 cpe:2.3:o:canonical:ubuntu_linux:12.10:*:*:*:*:*:*:*
canonical ubuntu_linux 13.10 cpe:2.3:o:canonical:ubuntu_linux:13.10:*:*:*:*:*:*:*
canonical ubuntu_linux 14.04 cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:esm:*:*:*
f5 big-ip_access_policy_manager >= 11.1.0, <= 11.5.1 cpe:2.3:a:f5:big-ip_access_policy_manager:*:*:*:*:*:*:*:*
f5 big-ip_advanced_firewall_manager >= 11.3.0, <= 11.5.1 cpe:2.3:a:f5:big-ip_advanced_firewall_manager:*:*:*:*:*:*:*:*
f5 big-ip_analytics >= 11.1.0, <= 11.5.1 cpe:2.3:a:f5:big-ip_analytics:*:*:*:*:*:*:*:*
f5 big-ip_application_acceleration_manager >= 11.4.0, <= 11.5.1 cpe:2.3:a:f5:big-ip_application_acceleration_manager:*:*:*:*:*:*:*:*
f5 big-ip_application_security_manager >= 11.1.0, <= 11.5.1 cpe:2.3:a:f5:big-ip_application_security_manager:*:*:*:*:*:*:*:*
f5 big-ip_edge_gateway >= 11.1.0, <= 11.3.0 cpe:2.3:a:f5:big-ip_edge_gateway:*:*:*:*:*:*:*:*
f5 big-ip_global_traffic_manager >= 11.1.0, <= 11.5.1 cpe:2.3:a:f5:big-ip_global_traffic_manager:*:*:*:*:*:*:*:*
f5 big-ip_link_controller >= 11.1.0, <= 11.5.1 cpe:2.3:a:f5:big-ip_link_controller:*:*:*:*:*:*:*:*
f5 big-ip_local_traffic_manager >= 11.1.0, <= 11.5.1 cpe:2.3:a:f5:big-ip_local_traffic_manager:*:*:*:*:*:*:*:*
f5 big-ip_policy_enforcement_manager >= 11.3.0, <= 11.5.1 cpe:2.3:a:f5:big-ip_policy_enforcement_manager:*:*:*:*:*:*:*:*
f5 big-ip_protocol_security_module >= 11.1.0, <= 11.4.1 cpe:2.3:a:f5:big-ip_protocol_security_module:*:*:*:*:*:*:*:*
f5 big-ip_wan_optimization_manager >= 11.1.0, <= 11.3.0 cpe:2.3:a:f5:big-ip_wan_optimization_manager:*:*:*:*:*:*:*:*
f5 big-ip_webaccelerator >= 11.1.0, <= 11.3.0 cpe:2.3:a:f5:big-ip_webaccelerator:*:*:*:*:*:*:*:*
f5 big-iq_application_delivery_controller 4.5.0 cpe:2.3:a:f5:big-iq_application_delivery_controller:4.5.0:*:*:*:*:*:*:*
f5 big-iq_centralized_management 4.6.0 cpe:2.3:a:f5:big-iq_centralized_management:4.6.0:*:*:*:*:*:*:*
f5 big-iq_cloud >= 4.0.0, <= 4.5.0 cpe:2.3:a:f5:big-iq_cloud:*:*:*:*:*:*:*:*
f5 big-iq_cloud_and_orchestration 1.0.0 cpe:2.3:a:f5:big-iq_cloud_and_orchestration:1.0.0:*:*:*:*:*:*:*
f5 big-iq_device >= 4.2.0, <= 4.5.0 cpe:2.3:a:f5:big-iq_device:*:*:*:*:*:*:*:*
f5 big-iq_security >= 4.0.0, <= 4.5.0 cpe:2.3:a:f5:big-iq_security:*:*:*:*:*:*:*:*
f5 enterprise_manager 3.1.0 cpe:2.3:a:f5:enterprise_manager:3.1.0:*:*:*:*:*:*:*
f5 enterprise_manager 3.1.1 cpe:2.3:a:f5:enterprise_manager:3.1.1:*:*:*:*:*:*:*

References for CVE-2014-0196

URL Tags
http://bugzilla.novell.com/show_bug.cgi?id=875690 Issue Tracking Permissions Required Third Party Advisory
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=4291086b1f081b869c6d79e5b7441633dc3ace00 Broken Link
http://linux.oracle.com/errata/ELSA-2014-0771.html Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2014-05/msg00007.html Mailing List Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2014-05/msg00012.html Mailing List Third Party Advisory
http://pastebin.com/raw.php?i=yTSFUBgZ Exploit Mailing List Third Party Advisory
http://rhn.redhat.com/errata/RHSA-2014-0512.html Third Party Advisory
http://secunia.com/advisories/59218 Not Applicable
http://secunia.com/advisories/59262 Broken Link
http://secunia.com/advisories/59599 Broken Link
http://source.android.com/security/bulletin/2016-07-01.html Not Applicable
http://support.f5.com/kb/en-us/solutions/public/15000/300/sol15319.html Third Party Advisory
http://www.debian.org/security/2014/dsa-2926 Third Party Advisory
http://www.debian.org/security/2014/dsa-2928 Third Party Advisory
http://www.exploit-db.com/exploits/33516 Exploit Third Party Advisory VDB Entry
http://www.openwall.com/lists/oss-security/2014/05/05/6 Mailing List Third Party Advisory
http://www.osvdb.org/106646 Broken Link
http://www.ubuntu.com/usn/USN-2196-1 Third Party Advisory
http://www.ubuntu.com/usn/USN-2197-1 Third Party Advisory
http://www.ubuntu.com/usn/USN-2198-1 Third Party Advisory
http://www.ubuntu.com/usn/USN-2199-1 Third Party Advisory
http://www.ubuntu.com/usn/USN-2200-1 Third Party Advisory
http://www.ubuntu.com/usn/USN-2201-1 Third Party Advisory
http://www.ubuntu.com/usn/USN-2202-1 Third Party Advisory
http://www.ubuntu.com/usn/USN-2203-1 Third Party Advisory
http://www.ubuntu.com/usn/USN-2204-1 Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1094232 Issue Tracking Patch Third Party Advisory
https://github.com/torvalds/linux/commit/4291086b1f081b869c6d79e5b7441633dc3ace00 Exploit Patch Third Party Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2014-0196 US Government Resource
cvelogic Threat Intelligence