Linux Kernel 3.18.9 race condition

CVSS Meta Temp Score
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CTI Interest Score
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A vulnerability was found in Linux Kernel 3.18.9 (Operating System). It has been rated as problematic. This issue affects some unknown functionality. The manipulation with an unknown input leads to a race condition vulnerability. Using CWE to declare the problem leads to CWE-362. The product contains a code sequence that can run concurrently with other code, and the code sequence requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence that is operating concurrently. Impacted is confidentiality.

The weakness was shared 01/28/2015 by Sasha Levin as confirmed mailinglist post (oss-sec). The advisory is shared at The identification of this vulnerability is CVE-2015-1420 since 01/29/2015. An attack has to be approached locally. No form of authentication is needed for a successful exploitation. Neither technical details nor an exploit are publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 84308 (Fedora 21 : kernel-4.0.5-200.fc21 (2015-9704)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Fedora Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 157380 (Oracle Enterprise Linux Security Update for Unbreakable Enterprise kernel (ELSA-2017-3516)).

Applying a patch is able to eliminate this problem. The bugfix is ready for download at

The vulnerability is also documented in the databases at X-Force (100643) and Tenable (84308). is providing further details.







CPE 2.3info

CPE 2.2info


VulDB Meta Base Score: 4.0
VulDB Meta Temp Score: 3.5

VulDB Base Score: 4.0
VulDB Temp Score: 3.5
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Class: Race condition
CWE: CWE-362
ATT&CK: Unknown

Local: Yes
Remote: No

Availability: 🔍
Status: Unproven

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Nessus ID: 84308
Nessus Name: Fedora 21 : kernel-4.0.5-200.fc21 (2015-9704)
Nessus File: 🔍
Nessus Risk: 🔍
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Nessus Port: 🔍

OpenVAS ID: 703170
OpenVAS Name: Debian Security Advisory DSA 3170-1 (linux - security update)
OpenVAS File: 🔍
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Threat Intelligenceinfo

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Recommended: Patch
Status: 🔍

0-Day Time: 🔍



01/28/2015 🔍
01/28/2015 +0 days 🔍
01/29/2015 +1 days 🔍
01/29/2015 +0 days 🔍
02/05/2015 +7 days 🔍
03/16/2015 +39 days 🔍
04/20/2015 +35 days 🔍
06/22/2015 +63 days 🔍
03/08/2022 +2451 days 🔍



Advisory: USN-2660-1
Researcher: Sasha Levin
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2015-1420 (🔍)

X-Force: 100643 - Linux Kernel fs/fhandle.c security bypass, Low Risk
Vulnerability Center: 49783 - Linux Kernel <=3.19.1 Local Security Bypass in fhandle.c, Low
SecurityFocus: 72357 - Linux Kernel 'fs/fhandle.c' Local Race Condition Vulnerability

Misc.: 🔍


Created: 02/05/2015 01:40 PM
Updated: 03/08/2022 01:06 PM
Changes: 02/05/2015 01:40 PM (69), 06/26/2017 10:53 AM (9), 03/08/2022 12:59 PM (4), 03/08/2022 01:06 PM (1)
Complete: 🔍


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