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Missing access checks in put_user/get_user kernel API (CVE-2013-6282)

Release Date:

November 14, 2013

Affected Projects:

Android for MSMFirefox OS for MSMQRD Android

Advisory ID:


CVE ID(s):



The following security vulnerability has been identified in the Linux kernel API. CVE-2013-6282: The get_user and put_user API functions of the Linux kernel fail to validate the target address when being used on ARM v6k/v7 platforms. This functionality was originally implemented and controlled by the domain switching feature (CONFIG_CPU_USE_DOMAINS), which has been deprecated due to architectural changes. As a result, any kernel code using these API functions may introduce a security issue where none existed before. This allows an application to read and write kernel memory to, e.g., escalated privileges.

Access Vector: Local
Security Risk: High
Access Vector: Local

Affected Versions:

All Android releases from CAF using the Linux kernel from the following heads: msm-3.4, jb*, ics*


We advise customers to apply the following patches:


This vulnerability is exploited in the wild and has been observed to be used in the public vroot exploit.


Initial revision