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Servers and applications

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 & !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.

Actively exploited: CISA added it to its Known Exploited Vulnerabilities catalog on 12 May 2023.

Severity
Medium 5.5
Published
7 May 2014
Last changed
17 Jun 2026
Added to UpHeron
1 Nov 2026
Exploit chance
20% in the next 30 daysHigher than 97% of CVEs. EPSS by FIRST, 12 Nov 2026
Weakness
Race condition (CWE-362)
Attack
Needs local access · Needs a user account · No user action needed
Attacker can
Take it down
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Sources
NVD

Affected software

SoftwareAffected versions
F5 BIG-IPServers and applications · cpe:a:f5:big-ip_access_policy_manager
  • From 11.1.0 up to 11.5.1
F5 BIG-IPServers and applications · cpe:a:f5:big-ip_local_traffic_manager
  • From 11.1.0 up to 11.5.1

Known exploited

CISA name
Linux Kernel Race Condition Vulnerability
Required action
The impacted product is end-of-life and should be disconnected if still in use.
Due for US agencies
2 Jun 2023
Used in ransomware
Not known

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2014-0196
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2014-0196