critical
10
CWE
416 19
Advisory Published
CVE Published
Updated

CVE-2016-7117: Use After Free

First published: Mon Oct 03 2016(Updated: )

A use after free vulnerability was found in the kernels socket recvmsg subsystem. This may allows remote attackers to corrupt memory and may allow execution of arbitrary code. This corruption takes place during the error handling routines within __sys_recvmmsg() function. To attack the kernel using this method the system must be running application using the UDP recvmmsg syscall(). Upstream patch: <a href="http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=34b88a68f26a75e4fded796f1a49c40f82234b7d">http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=34b88a68f26a75e4fded796f1a49c40f82234b7d</a> Upstream discussion: <a href="https://patchwork.kernel.org/patch/8093221/">https://patchwork.kernel.org/patch/8093221/</a> Additional Write up: <a href="https://blog.lizzie.io/notes-about-cve-2016-7117.html">https://blog.lizzie.io/notes-about-cve-2016-7117.html</a>

Credit: security@android.com security@android.com

Affected SoftwareAffected VersionHow to fix
Debian Debian Linux=7.0
Linux Linux kernel>=2.6.33<3.2.80
Linux Linux kernel>=3.3<3.4.113
Linux Linux kernel>=3.5<3.10.102
Linux Linux kernel>=3.11<3.12.59
Linux Linux kernel>=3.13<3.14.67
Linux Linux kernel>=3.15<3.16.35
Linux Linux kernel>=3.17<3.18.37
Linux Linux kernel>=3.19<4.1.28
Linux Linux kernel>=4.2.0<4.4.8
Linux Linux kernel>=4.5.0<4.5.2
Canonical Ubuntu Linux=16.04
Google Android
debian/linux
5.10.223-1
5.10.226-1
6.1.115-1
6.1.119-1
6.11.10-1
6.12.5-1

Remedy

http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=34b88a68f26a75e4fded796f1a49c40f82234b7d

Remedy

https://github.com/torvalds/linux/commit/34b88a68f26a75e4fded796f1a49c40f82234b7d

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Reference Links

Frequently Asked Questions

  • What is CVE-2016-7117?

    CVE-2016-7117 is a use-after-free vulnerability in the Linux kernel that allows remote attackers to execute arbitrary code.

  • Which versions of Linux kernel are affected by CVE-2016-7117?

    The Linux kernel versions before 4.5.2 are affected by CVE-2016-7117.

  • How severe is CVE-2016-7117?

    CVE-2016-7117 is classified as a critical vulnerability with a severity score of 9.

  • How can I fix CVE-2016-7117?

    To fix CVE-2016-7117, update your Linux kernel to version 4.5.2 or later.

  • Where can I find more information about CVE-2016-7117?

    You can find more information about CVE-2016-7117 in the references provided: http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=34b88a68f26a75e4fded796f1a49c40f82234b7d, http://source.android.com/security/bulletin/2016-10-01.html, http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.5.2.

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