VDB-93981 · CVE-2016-9120 · BID 94669

Linux Kernel up to 4.5 ion.c ion_ioctl use after free

CVSS Meta Temp Score
CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.
Current Exploit Price (≈)
Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.
CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.

A vulnerability, which was classified as problematic, was found in Linux Kernel up to 4.5 (Operating System). This affects the function ion_ioctl of the file drivers/staging/android/ion/ion.c. The manipulation with an unknown input leads to a use after free vulnerability. CWE is classifying the issue as CWE-416. Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

Race condition in the ion_ioctl function in drivers/staging/android/ion/ion.c in the Linux kernel before 4.6 allows local users to gain privileges or cause a denial of service (use-after-free) by calling ION_IOC_FREE on two CPUs at the same time.

The bug was discovered 12/08/2016. The weakness was released 12/08/2016 as confirmed git commit (GIT Repository). The advisory is shared at git.kernel.org. This vulnerability is uniquely identified as CVE-2016-9120 since 10/30/2016. An attack has to be approached locally. Required for exploitation is a authentication. Technical details are known, but no exploit is available.

Upgrading to version 4.6 eliminates this vulnerability. Applying a patch is able to eliminate this problem. The bugfix is ready for download at git.kernel.org. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the vulnerability database at SecurityFocus (BID 94669†). Entry connected to this vulnerability is available at VDB-93980.







CPE 2.3info

CPE 2.2info


VulDB CVSS-B Score: 🔍
VulDB CVSS-BT Score: 🔍
VulDB Vector: 🔍
VulDB Reliability: 🔍


VulDB Meta Base Score: 6.5
VulDB Meta Temp Score: 6.4

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.8
NVD Vector: 🔍



VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍


Class: Use after free
CWE: CWE-416 / CWE-119

Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍


Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍


Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Kernel 4.6
Patch: git.kernel.org


10/30/2016 🔍
12/06/2016 +37 days 🔍
12/08/2016 +2 days 🔍
12/08/2016 +0 days 🔍
12/08/2016 +0 days 🔍
12/09/2016 +1 days 🔍
10/05/2022 +2126 days 🔍


Vendor: kernel.org

Advisory: 9590232bb4f4cc824f3425a6e1349afbe6d6d2b7
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2016-9120 (🔍)
SecurityFocus: 94669 - Linux Kernel CVE-2016-9120 Local Use After Free Memory Corruption Vulnerability

See also: 🔍


Created: 12/09/2016 07:49 AM
Updated: 10/05/2022 08:37 AM
Changes: 12/09/2016 07:49 AM (65), 08/24/2019 12:51 PM (5), 10/05/2022 08:37 AM (4)
Complete: 🔍
Cache ID: 44:ACD:40


No comments yet. Languages: en.

Please log in to comment.

Do you want to use VulDB in your project?

Use the official API to access entries easily!