CVE-2014-0196
MediumExploitedPublic exploitThe 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…
Published May 7, 2014 · Updated Aug 11, 2026 · Also known as DEBIAN-CVE-2014-0196, DSA-2926-1, DSA-2928-1, UBUNTU-CVE-2014-0196, USN-2204-1
Key Facts
Patch immediately- CVE-2014-0196 is a medium-severity vulnerability (CVSS 5.5 v3.1) affecting Big-Ip Access Policy Manager (F5), Big-Ip Advanced Firewall Manager (F5), Big-Ip Analytics (F5) and 22 more products.
- It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since May 12, 2023. Public exploit code is available.
- EPSS estimates a 22% probability of exploitation in the next 30 days.
- Fixed versions are available, including btrfs-kmp-default 0_2.6.32.54_0.3-0.3.73, btrfs-kmp-pae 0_2.6.32.59_0.13-0.3.163, btrfs-kmp-xen 0_2.6.32.54_0.3-0.3.73.
- Brandefense priority: patch immediately, because it is listed as exploited in the wild.
CVSS v3.1
5.5
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
EPSS (30-day exploit likelihood)
22%
Higher than 97.6% of all scored CVEs
Exploited in the wild
Yes
4 catalog listings
Public exploit code
Available
Proof-of-concept or weaponized module
Get the full CVE-2014-0196 brief as a PDF
Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.
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.
Known-Exploited Catalog Listings
| Catalog | Added | Remediation due | Ransomware use |
|---|---|---|---|
| CISA KEV | May 12, 2023 | Jun 2, 2023 | Not reported |
| Industry KEV feed | May 12, 2023 | Jun 2, 2023 | Not reported |
| CIRCL KEV | May 12, 2023 | Jun 2, 2023 | Not reported |
| ENISA EUVD | May 12, 2023 | n/a | Not reported |
Required action: The impacted product is end-of-life and should be disconnected if still in use.
Affected Products
410 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| Big-Ip Access Policy ManagerF5 | See advisory | 11.5.1 |
| Big-Ip Advanced Firewall ManagerF5 | See advisory | 11.5.1 |
| Big-Ip AnalyticsF5 | See advisory | 11.5.1 |
| Big-Ip Application Acceleration ManagerF5 | See advisory | 11.5.1 |
| Big-Ip Application Security ManagerF5 | See advisory | 11.5.1 |
Patched Releases
btrfs-kmp-default
0_2.6.32.54_0.3-0.3.73
btrfs-kmp-pae
0_2.6.32.59_0.13-0.3.163
btrfs-kmp-xen
0_2.6.32.54_0.3-0.3.73
cluster-network-kmp-bigsmp
1.4_3.0.101_0.47.55-2.28.1.21
cluster-network-kmp-default
1.4_3.0.101_0.40-2.27.98
cluster-network-kmp-pae
1.4_3.0.101_0.40-2.27.98
cluster-network-kmp-ppc64
1.4_3.0.101_0.40-2.27.98
cluster-network-kmp-rt
1.4_3.0.101_rt130_0.28-2.27.99
cluster-network-kmp-rt_trace
1.4_3.0.101_rt130_0.28-2.27.99
cluster-network-kmp-trace
1.4_3.0.101_0.40-2.27.98
cluster-network-kmp-xen
1.4_3.0.101_0.40-2.27.98
drbd-kmp-rt
8.4.4_3.0.101_rt130_0.28-0.22.65
drbd-kmp-rt_trace
8.4.4_3.0.101_rt130_0.28-0.22.65
dtrace-modules-3.8.13-35.el6uek
0.4.3-4.el6
dtrace-modules-headers
0.4.3-4.el6
dtrace-modules-provider-headers
0.4.3-4.el6
ext4dev-kmp-default
0_2.6.32.54_0.3-7.9.40
ext4dev-kmp-pae
0_2.6.32.59_0.13-7.9.130
ext4dev-kmp-trace
0_2.6.32.54_0.3-7.9.40
ext4dev-kmp-xen
0_2.6.32.54_0.3-7.9.40
Big-Ip Access Policy Manager
11.5.1
Big-Ip Advanced Firewall Manager
11.5.1
Big-Ip Analytics
11.5.1
Big-Ip Application Acceleration Manager
11.5.1
Big-Ip Application Security Manager
11.5.1
Timeline
Publicly disclosed
May 7, 2014
Added to CISA KEV
May 12, 2023
Added to Industry KEV feed
May 12, 2023
Added to CIRCL KEV
May 12, 2023
Added to ENISA EUVD
May 12, 2023
Last updated
Aug 11, 2026
Weakness Type
- CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
References
- advisoryhttp://bugzilla.novell.com/show_bug.cgi?id=875690
- advisoryhttp://linux.oracle.com/errata/ELSA-2014-0771.html
- advisorySUSE-SU-2014:0667
- advisorySUSE-SU-2014:0683
- advisoryRHSA-2014:0512
FAQ
Common Questions.
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 wri…
Affected: Big-Ip Access Policy Manager (F5); Big-Ip Advanced Firewall Manager (F5); Big-Ip Analytics (F5), among others. The full list is in the CVE brief.
It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since May 12, 2023.
Yes. It was added on May 12, 2023 with a federal remediation due date of Jun 2, 2023.
Public exploit code is available.
Fixed versions are available, including btrfs-kmp-default 0_2.6.32.54_0.3-0.3.73, btrfs-kmp-pae 0_2.6.32.59_0.13-0.3.163, btrfs-kmp-xen 0_2.6.32.54_0.3-0.3.73.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.
Is CVE-2014-0196 Running On Your Attack Surface?
Brandefense maps vulnerabilities like this one to your internet-facing assets and tells you exactly where to patch.
Request A Demo