CVE-2016-4581: Null Pointer Dereference
First published: Fri May 06 2016(Updated: )
fs/pnode.c in the Linux kernel before 4.5.4 does not properly traverse a mount propagation tree in a certain case involving a slave mount, which allows local users to cause a denial of service (NULL pointer dereference and OOPS) via a crafted series of mount system calls.
Credit: secalert@redhat.com secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Canonical Ubuntu Linux | =12.04 | |
| Canonical Ubuntu Linux | =14.04 | |
| Canonical Ubuntu Linux | =15.10 | |
| Canonical Ubuntu Linux | =16.04 | |
| Linux Linux kernel | <=4.5.3 | |
| Oracle Linux | =6 | |
| debian/linux | 5.10.223-1 5.10.226-1 6.1.115-1 6.1.119-1 6.12.5-1 6.12.6-1 |
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Reference Links
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=5ec0811d30378ae104f250bfc9b3640242d81e3f
- http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00044.html
- http://rhn.redhat.com/errata/RHSA-2016-2574.html
- http://rhn.redhat.com/errata/RHSA-2016-2584.html
- http://www.debian.org/security/2016/dsa-3607
- http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.5.4
- http://www.openwall.com/lists/oss-security/2016/05/11/2
- 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/90607
- http://www.ubuntu.com/usn/USN-2989-1
- http://www.ubuntu.com/usn/USN-2998-1
- http://www.ubuntu.com/usn/USN-3000-1
- http://www.ubuntu.com/usn/USN-3001-1
- http://www.ubuntu.com/usn/USN-3002-1
- http://www.ubuntu.com/usn/USN-3003-1
- http://www.ubuntu.com/usn/USN-3004-1
- http://www.ubuntu.com/usn/USN-3005-1
- http://www.ubuntu.com/usn/USN-3006-1
- http://www.ubuntu.com/usn/USN-3007-1
- https://bugzilla.redhat.com/show_bug.cgi?id=1333712
- https://github.com/torvalds/linux/commit/5ec0811d30378ae104f250bfc9b3640242d81e3f
- https://launchpad.net/bugs/cve/CVE-2016-4581
- https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=5ec0811d30378ae104f250bfc9b3640242d81e3f
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1333713
- http://seclists.org/oss-sec/2016/q2/313
- http://seclists.org/oss-sec/2016/q2/318
- https://rhn.redhat.com/errata/RHSA-2016-2574.html
- https://rhn.redhat.com/errata/RHSA-2016-2584.html
- https://git.kernel.org/linus/5ec0811d30378ae104f250bfc9b3640242d81e3f
- https://git.kernel.org/linus/f2ebb3a921c1ca1e2ddd9242e95a1989a50c4c68
- https://security-tracker.debian.org/tracker/CVE-2016-4581
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-4581
- https://nvd.nist.gov/vuln/detail/CVE-2016-4581
- https://ubuntu.com/security/CVE-2016-4581
Frequently Asked Questions
What is the vulnerability ID for this vulnerability?
The vulnerability ID for this vulnerability is CVE-2016-4581.
What is the severity of CVE-2016-4581?
The severity of CVE-2016-4581 is medium.
What is the affected software?
The affected software versions include Linux kernel 3.13.0-87.133, 4.2.0-38.45, 4.4.0-24.43, and 4.6~.
How can I fix CVE-2016-4581?
To fix CVE-2016-4581, update your Linux kernel to version 4.5.4 or later.
Where can I find more information about CVE-2016-4581?
You can find more information about CVE-2016-4581 in the references: [1](https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=5ec0811d30378ae104f250bfc9b3640242d81e3f), [2](https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1333713), [3](http://seclists.org/oss-sec/2016/q2/313).
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