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…
- 5.5MediumCVSS base score
- 20.3%Exploitation in 30 daysEPSS · top 2.5% of all CVEs
- YesKnown exploitedin CISA's KEV since 12 May 2023
- 1Public exploitsMetasploit, Nuclei and Exploit-DB
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.
Exploited in the wild
CISA lists this vulnerability in its Known Exploited Vulnerabilities catalog as Linux Kernel Race Condition Vulnerability.
- Added
- 12 May 2023
- Fix due (US federal)
- 2 Jun 2023
- Used by ransomware
- Not known
The impacted product is end-of-life and should be disconnected if still in use.
ENISA's EU Vulnerability Database lists it as exploited, from CISA's KEV, since 12 May 2023.
Public exploit
An exploit or proof of concept is public: anyone can try it against an unpatched system. The public collections list an Exploit-DB entry for it. A reference of the record is tagged as an exploit. CISA's SSVC rates its exploitation: it is being exploited.
Show the exploits2
Exploit-DB1 entry
- Linux Kernel 3.14-rc1 < 3.15-rc4 (x64) - Raw Mode PTY Echo Race Condition Privilege Escalation (Exploit-DB entry) (opens in a new tab)
EDB-ID 33516local, linux_x86-64published 26 May 2014Not verified
References tagged exploit1 reference
- 33516 (opens in a new tab)exploitx_refsource_EXPLOIT-DBx_transferred
Modules, templates and exploits as listed by the Metasploit Framework (BSD-3-Clause), ProjectDiscovery's Nuclei templates (MIT) and the Exploit Database (GPLv2), read once a day. Where the data comes from
Timeline
ID reserved
By redhat
- 5 months later
· 5 months later
Published
- 9 years later
· 9 years later
Added to CISA KEV
Known exploited in the wild
- 2 years later
· 2 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| CISA-ADPADP (enrichment) | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
| NVDNVD · Analyzed | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 20.3% · top 2.5% of all CVEs (10 Nov 2026)
- CISA SSVC
- Exploitation: active · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.5.
Affected products
n/a
- affected n/a
References
29
- USN-2203-1 (opens in a new tab)vendor-advisoryx_refsource_UBUNTUx_transferred
- http://support.f5.com/kb/en-us/solutions/public/15000/300/sol15319.html (opens in a new tab)x_refsource_CONFIRMx_transferred
- 106646 (opens in a new tab)vdb-entryx_refsource_OSVDBx_transferred
- SUSE-SU-2014:0683 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
- [oss-security] 20140429 CVE-2014-0196: Linux kernel pty layer race condition memory corruption (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
- 59262 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
- USN-2204-1 (opens in a new tab)vendor-advisoryx_refsource_UBUNTUx_transferred
- 59218 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
- USN-2202-1 (opens in a new tab)vendor-advisoryx_refsource_UBUNTUx_transferred
- 33516 (opens in a new tab)exploitx_refsource_EXPLOIT-DBx_transferred
- DSA-2928 (opens in a new tab)vendor-advisoryx_refsource_DEBIANx_transferred
- USN-2199-1 (opens in a new tab)vendor-advisoryx_refsource_UBUNTUx_transferred
- http://linux.oracle.com/errata/ELSA-2014-0771.html (opens in a new tab)x_refsource_CONFIRMx_transferred
- https://bugzilla.redhat.com/show_bug.cgi?id=1094232 (opens in a new tab)x_refsource_CONFIRMx_transferred
- USN-2197-1 (opens in a new tab)vendor-advisoryx_refsource_UBUNTUx_transferred
- http://source.android.com/security/bulletin/2016-07-01.html (opens in a new tab)x_refsource_CONFIRMx_transferred
- RHSA-2014:0512 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- 59599 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
- DSA-2926 (opens in a new tab)vendor-advisoryx_refsource_DEBIANx_transferred
- https://github.com/torvalds/linux/commit/4291086b1f081b869c6d79e5b7441633dc3ace00 (opens in a new tab)x_refsource_CONFIRMx_transferred
- SUSE-SU-2014:0667 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
- http://pastebin.com/raw.php?i=yTSFUBgZ (opens in a new tab)x_refsource_MISCx_transferred
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=4291086b1f081b869c6d79e5b7441633dc3ace00 (opens in a new tab)x_refsource_CONFIRMx_transferred
- http://bugzilla.novell.com/show_bug.cgi?id=875690 (opens in a new tab)x_refsource_CONFIRMx_transferred
- USN-2198-1 (opens in a new tab)vendor-advisoryx_refsource_UBUNTUx_transferred
- USN-2200-1 (opens in a new tab)vendor-advisoryx_refsource_UBUNTUx_transferred
- USN-2201-1 (opens in a new tab)vendor-advisoryx_refsource_UBUNTUx_transferred
- USN-2196-1 (opens in a new tab)vendor-advisoryx_refsource_UBUNTUx_transferred
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2014-0196 (opens in a new tab)government-resource
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- CISA KEV catalog (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2014-0247 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2014-0196)Record last updated .