Linux Kernel 3.14.1/3.14.2/3.14.3/3.14.4/3.14.5 Futex Subsystem kernel/futex.c futex_requeue access control

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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A vulnerability was found in Linux Kernel 3.14.1/3.14.2/3.14.3/3.14.4/3.14.5 (Operating System). It has been rated as critical. This issue affects the function futex_requeue of the file kernel/futex.c of the component Futex Subsystem. The manipulation with an unknown input leads to a privilege escalation vulnerability. Using CWE to declare the problem leads to CWE-264. Impacted is confidentiality, integrity, and availability.

The weakness was presented 06/05/2014 by Pinkie Pie as DSA 2949-1 as confirmed mailinglist post (Mailing List). It is possible to read the advisory at The identification of this vulnerability is CVE-2014-3153 since 05/03/2014. The exploitation is known to be easy. Attacking locally is a requirement. No form of authentication is needed for a successful exploitation. Technical details as well as a public exploit are known. The attack technique deployed by this issue is T1068 according to MITRE ATT&CK. The advisory points out:

(...) allows a local user to gain ring 0 control via the futex syscall. An unprivileged user could use this flaw to crash the kernel (resulting in denial of service) or for privilege escalation.

A public exploit has been developed by Kaiqu Chen in ANSI C and been published 7 months after the advisory. It is declared as highly functional. The exploit is available at We expect the 0-day to have been worth approximately $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 74357 (Ubuntu 12.04 LTS : linux-lts-quantal vulnerability (USN-2237-1)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Ubuntu Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 167228 (SUSE Enterprise Linux Security Update for Linux Kernel (SUSE-SU-2014:0807-1)).

Upgrading to version 3.2.57 eliminates this vulnerability. Applying a patch is able to eliminate this problem. The bugfix is ready for download at The best possible mitigation is suggested to be upgrading to the latest version. The vulnerability will be addressed with the following lines of code:

if (requeue_pi && match_futex(&key1, &key2)) {
   ret = -EINVAL;
   goto out_put_keys;

The vulnerability is also documented in the databases at X-Force (93593), SecurityTracker (ID 1030451), Vulnerability Center (SBV-44792), Tenable (74357) and Exploit-DB (35370). is providing further details. See 11302, 11755, 12214 and 12411 for similar entries.





CPE 2.3info

CPE 2.2info


VulDB Meta Base Score: 8.4
VulDB Meta Temp Score: 7.3

VulDB Base Score: 8.4
VulDB Temp Score: 7.3
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Class: Privilege escalation
CWE: CWE-264
ATT&CK: T1068

Local: Yes
Remote: No

Availability: 🔍
Access: Public
Status: Highly functional
Author: Kaiqu Chen
Programming Language: 🔍
Download: 🔍

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Nessus ID: 74357
Nessus Name: Ubuntu 12.04 LTS : linux-lts-quantal vulnerability (USN-2237-1)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
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OpenVAS ID: 800909
OpenVAS Name: Fedora Update for kernel FEDORA-2015-5024
OpenVAS File: 🔍
OpenVAS Family: 🔍

Saint ID: linux_kernel_futex_requeue
Saint Name: Linux kernel futex_requeue privilege elevation

Qualys ID: 🔍
Qualys Name: 🔍

MetaSploit ID: futex_requeue.rb
MetaSploit Name: Android Towelroot Futex Requeue Kernel Exploit
MetaSploit File: 🔍

Exploit-DB: 🔍

Threat Intelligenceinfo

Interest: 🔍
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Recommended: Upgrade
Status: 🔍

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Upgrade: Kernel 3.2.57


05/03/2014 🔍
06/05/2014 +33 days 🔍
06/05/2014 +0 days 🔍
06/06/2014 +1 days 🔍
06/06/2014 +0 days 🔍
06/06/2014 +0 days 🔍
06/07/2014 +1 days 🔍
06/07/2014 +0 days 🔍
06/08/2014 +1 days 🔍
06/19/2014 +11 days 🔍
11/25/2014 +159 days 🔍
11/25/2014 +0 days 🔍
06/20/2021 +2399 days 🔍



Advisory: DSA 2949-1
Researcher: Pinkie Pie
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2014-3153 (🔍)

X-Force: 93593 - Linux Kernel futex privilege escalation, High Risk
SecurityTracker: 1030451 - Linux Kernel PI Futex Requeuing Bug Lets Local Users Gain Elevated Privileges
Vulnerability Center: 44792 - Linux Kernel <=3.14.5 Local Security Bypass via Crafted FUTEX_REQUEUE Commend, High
SecurityFocus: 67906 - Linux Kernel CVE-2014-3153 Local Privilege Escalation Vulnerability
Secunia: 59029 - Linux Kernel Futex Requeue Privilege Escalation Vulnerability, Less Critical

scip Labs:
Misc.: 🔍
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Created: 06/06/2014 10:52 AM
Updated: 06/20/2021 05:33 PM
Changes: (1) source_nessus_risk
Complete: 🔍


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