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CVE

CVE-2014-0196

Linux Kernel Race Condition Vulnerability

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.

MEDIUM · CVSS 5.5 ⚠ CISA KEV EPSS 0.49911
Act now
  • Listed on CISA KEV (known exploited in the wild)
  • SSVC exploitation status: active
  • EPSS ≥ 0.10 - elevated exploitation probability
  • EPSS percentile: top 2% of all CVEs by exploitation likelihood
  • Public exploit or PoC is available
Sigma rules0 YARA rules0
⬢

Required Remediation

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

⬡

Weakness Classification

CWE-362Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
CWE-362Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
▤

Affected Products & Versions

35
linux kernel> 2.6.31 and < 3.2.59
linux kernel>= 3.3 and < 3.4.91
linux kernel>= 3.5 and < 3.10.40
linux kernel>= 3.11 and < 3.12.20
linux kernel>= 3.13 and < 3.14.4
linux kernelall versions
debian linuxall versions
redhat enterprise linuxall versions
⚠

Public Exploits & PoCs

4
localLinux Kernel 3.14-rc1 < 3.15-rc4 (x64) - Raw Mode PTY Echo Race Condition Privilege Escalation2014-05-26
pocpastebin.com · raw.php?i=yTSFUBgZpastebin.com
pocwww.exploit-db.com · 33516www.exploit-db.com
pocgithub.com · 4291086b1f081b869c6d79e5b7441633dc3ace00github.com
▣

Scoring & Timeline

5.5
MEDIUM · CVSS v3.1 · secalert@redhat.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD07 May 2014 · 10:55 AM
CVSS VectorCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
SSVC triage · cisa-vulnrichment
Exploitation
active
Automatable
no
Technical impact
partial
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
⚑

Vendor Advisories

25
suse-csafopenSUSE-SU-2024:10128-1
cisaKEV-CVE-2014-0196
suse-csafSUSE-SU-2015:0736-1
suse-csafSUSE-SU-2015:1376-1
suse-csafsuse-ru-2015_0621-1
🔗

References & Sources

26
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
http://bugzilla.novell.com/show_bug.cgi?id=875690Issue TrackingPermissions RequiredThird Party Advisory
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.gitBroken Link
http://linux.oracle.com/errata/ELSA-2014-0771.htmlThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2014-05/msg00007.htmlMailing ListThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2014-05/msg00012.htmlMailing ListThird Party Advisory
http://rhn.redhat.com/errata/RHSA-2014-0512.htmlThird Party Advisory
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