CVE-2016-9120: Use After Free
First published: Mon Dec 05 2016(Updated: )
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.
Credit: security@android.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Android | ||
| Linux kernel | >=3.14<3.16.40 | |
| Linux kernel | >=3.17<3.18.51 | |
| Linux kernel | >=3.19<4.1.41 | |
| Linux kernel | >=4.2<4.4.65 | |
| Linux kernel | >=4.5<4.6 |
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Reference Links
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=9590232bb4f4cc824f3425a6e1349afbe6d6d2b7
- https://source.android.com/docs/security/bulletin/2016-12-01 (Advisory)
- http://source.android.com/security/bulletin/2016-12-01.html
- http://www.securityfocus.com/bid/94669
- https://github.com/torvalds/linux/commit/9590232bb4f4cc824f3425a6e1349afbe6d6d2b7
Frequently Asked Questions
What is the severity of CVE-2016-9120?
CVE-2016-9120 has been classified as a high severity vulnerability due to its potential for privilege escalation and causing a denial of service.
How do I fix CVE-2016-9120?
To fix CVE-2016-9120, upgrade to a Linux kernel version 4.6 or later where the vulnerability has been patched.
What does CVE-2016-9120 affect?
CVE-2016-9120 affects the Linux kernel versions prior to 4.6 and also impacts certain versions of Android.
What is the risk of not addressing CVE-2016-9120?
Failure to address CVE-2016-9120 may allow attackers to exploit the race condition, leading to privilege escalation or system crashes.
How can I determine if my system is vulnerable to CVE-2016-9120?
Check if your Linux kernel version is below 4.6 or if your Android version is affected by the specific versions listed for CVE-2016-9120.
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