CVE-2016-2069: Race Condition
First published: Tue Jan 26 2016(Updated: )
A flaw was discovered in a way the Linux deals with paging structures. When Linux invalidates a paging structure that is not in use locally, it could, in principle, race against another CPU that is switching to a process that uses the paging structure in question. External reference: <a href="http://seclists.org/oss-sec/2016/q1/194">http://seclists.org/oss-sec/2016/q1/194</a> Upstream fix: <a href="http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=71b3c126e61177eb693423f2e18a1914205b165e">http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=71b3c126e61177eb693423f2e18a1914205b165e</a> CVE assignment: <a href="http://seclists.org/oss-sec/2016/q1/210">http://seclists.org/oss-sec/2016/q1/210</a>
Credit: cve@mitre.org cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Canonical Ubuntu Linux | =12.04 | |
| Canonical Ubuntu Linux | =14.04 | |
| Linux Linux kernel | <=4.4 | |
| 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 |
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Reference Links
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=71b3c126e61177eb693423f2e18a1914205b165e
- http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00094.html
- http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00015.html
- http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00045.html
- http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00038.html
- http://rhn.redhat.com/errata/RHSA-2016-2574.html
- http://rhn.redhat.com/errata/RHSA-2016-2584.html
- http://rhn.redhat.com/errata/RHSA-2017-0817.html
- http://www.debian.org/security/2016/dsa-3503
- http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.4.1
- http://www.openwall.com/lists/oss-security/2016/01/25/1
- http://www.oracle.com/technetwork/topics/security/linuxbulletinjul2016-3090544.html
- http://www.oracle.com/technetwork/topics/security/ovmbulletinoct2016-3090547.html
- http://www.securityfocus.com/bid/81809
- http://www.ubuntu.com/usn/USN-2931-1
- http://www.ubuntu.com/usn/USN-2932-1
- http://www.ubuntu.com/usn/USN-2967-1
- http://www.ubuntu.com/usn/USN-2967-2
- http://www.ubuntu.com/usn/USN-2989-1
- http://www.ubuntu.com/usn/USN-2998-1
- https://bugzilla.redhat.com/show_bug.cgi?id=1301893
- https://github.com/torvalds/linux/commit/71b3c126e61177eb693423f2e18a1914205b165e
- https://launchpad.net/bugs/cve/CVE-2016-2069
- http://seclists.org/oss-sec/2016/q1/194
- http://seclists.org/oss-sec/2016/q1/210
- https://access.redhat.com/support/policy/updates/errata/
- https://rhn.redhat.com/errata/RHSA-2016-2574.html
- https://rhn.redhat.com/errata/RHSA-2016-2584.html
- https://rhn.redhat.com/errata/RHSA-2017-0817.html
- https://www.openwall.com/lists/oss-security/2016/01/25/1
- https://git.kernel.org/linus/71b3c126e61177eb693423f2e18a1914205b165e
- https://git.kernel.org/linus/4eaffdd5a5fe6ff9f95e1ab4de1ac904d5e0fa8b
- https://security-tracker.debian.org/tracker/CVE-2016-2069
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-2069
- https://nvd.nist.gov/vuln/detail/CVE-2016-2069
- https://ubuntu.com/security/CVE-2016-2069
Frequently Asked Questions
What is CVE-2016-2069?
CVE-2016-2069 is a vulnerability in the Linux kernel that allows local users to gain privileges through a race condition in the arch/x86/mm/tlb.c file.
How severe is CVE-2016-2069?
CVE-2016-2069 has a severity rating of medium.
Which versions of Linux kernel are affected by CVE-2016-2069?
The affected versions include Linux kernel versions before 4.4.1, 3.2.0-102.142, 3.13.0-87.133, 4.5~, and 4.2.0-30.35.
How can I fix CVE-2016-2069?
To fix CVE-2016-2069, update your Linux kernel to version 4.4.1 or newer.
Where can I find more information about CVE-2016-2069?
You can find more information about CVE-2016-2069 in the references provided: http://www.openwall.com/lists/oss-security/2016/01/25/1, http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=71b3c126e61177eb693423f2e18a1914205b165e, http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.4.1.
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