CVE-2016-4998: Buffer Overflow
First published: Fri Jun 24 2016(Updated: )
An out-of-bounds heap memory access, leading to a Denial of Service or possibly heap disclosure or further impact was found in setsockopt(). The particular setsockopt() call is normally restricted to root, however some processes with cap_sys_admin may also be able to trigger this flaw. Upstream fixes <a href="http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=ce683e5f9d04">http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=ce683e5f9d04</a> <a href="http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=6e94e0cfb088">http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=6e94e0cfb088</a> <a href="http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=bdf533de6968">http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=bdf533de6968</a> Discussion on oss-sec: <a href="http://www.openwall.com/lists/oss-security/2016/06/24/5">http://www.openwall.com/lists/oss-security/2016/06/24/5</a>
Credit: secalert@redhat.com secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Linux kernel | <=4.5.5 | |
| Oracle Linux | =7 | |
| Canonical Ubuntu Linux | =12.04 | |
| Canonical Ubuntu Linux | =14.04 | |
| Canonical Ubuntu Linux | =15.10 | |
| Canonical Ubuntu Linux | =16.04 | |
| debian/linux | 5.10.223-1 5.10.226-1 6.1.115-1 6.1.112-1 6.11.7-1 6.11.9-1 |
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Reference Links
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=6e94e0cfb0887e4013b3b930fa6ab1fe6bb6ba91
- http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00044.html
- http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00055.html
- http://rhn.redhat.com/errata/RHSA-2016-1847.html
- http://rhn.redhat.com/errata/RHSA-2016-1875.html
- http://rhn.redhat.com/errata/RHSA-2016-1883.html
- http://rhn.redhat.com/errata/RHSA-2017-0036.html
- http://www.debian.org/security/2016/dsa-3607
- http://www.openwall.com/lists/oss-security/2016/06/24/5
- http://www.oracle.com/technetwork/topics/security/linuxbulletinjul2016-3090544.html
- http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2016-3090545.html
- http://www.oracle.com/technetwork/topics/security/ovmbulletinoct2016-3090547.html
- http://www.securityfocus.com/bid/91451
- http://www.securitytracker.com/id/1036171
- http://www.ubuntu.com/usn/USN-3016-1
- http://www.ubuntu.com/usn/USN-3016-2
- http://www.ubuntu.com/usn/USN-3016-3
- http://www.ubuntu.com/usn/USN-3016-4
- http://www.ubuntu.com/usn/USN-3017-1
- http://www.ubuntu.com/usn/USN-3017-2
- http://www.ubuntu.com/usn/USN-3017-3
- http://www.ubuntu.com/usn/USN-3018-1
- http://www.ubuntu.com/usn/USN-3018-2
- http://www.ubuntu.com/usn/USN-3019-1
- http://www.ubuntu.com/usn/USN-3020-1
- https://bugzilla.redhat.com/show_bug.cgi?id=1349886
- https://github.com/torvalds/linux/commit/6e94e0cfb0887e4013b3b930fa6ab1fe6bb6ba91
- https://launchpad.net/bugs/cve/CVE-2016-4998
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=ce683e5f9d04
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=6e94e0cfb088
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=bdf533de6968
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1350316
- http://seclists.org/oss-sec/2016/q2/599
- https://rhn.redhat.com/errata/RHSA-2016-1883.html
- https://rhn.redhat.com/errata/RHSA-2016-1847.html
- https://rhn.redhat.com/errata/RHSA-2016-1875.html
- https://rhn.redhat.com/errata/RHSA-2017-0036.html
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-4998
- https://nvd.nist.gov/vuln/detail/CVE-2016-4998
- https://security-tracker.debian.org/tracker/CVE-2016-4998
- https://ubuntu.com/security/CVE-2016-4998
Frequently Asked Questions
What is CVE-2016-4998?
CVE-2016-4998 is a vulnerability in the Linux kernel that allows local users to cause a denial of service or obtain sensitive information from kernel heap memory.
How does CVE-2016-4998 impact the Linux kernel?
CVE-2016-4998 can result in an out-of-bounds read, leading to a denial of service or potential information disclosure.
Which versions of the Linux kernel are affected by CVE-2016-4998?
CVE-2016-4998 affects Linux kernel versions before 4.6.
How can the vulnerability in CVE-2016-4998 be fixed?
To fix the vulnerability in CVE-2016-4998, update to Linux kernel version 4.6 or later.
Where can I find more information about CVE-2016-4998?
You can find more information about CVE-2016-4998 at the following references: [SecurityTracker](http://www.securitytracker.com/id/1036171), [SecurityFocus](http://www.securityfocus.com/bid/91451), [Debian Security Advisory](http://www.debian.org/security/2016/dsa-3607).
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