CVE-2015-6252
First published: Mon Aug 10 2015(Updated: )
A flaw was found in the way the Linux kernel's vhost driver treated userspace provided log file descriptor when processing the VHOST_SET_LOG_FD ioctl command. The file descriptor was never released and continued to consume kernel memory. A privileged local user with access to the /dev/vhost-net files could use this flaw to create a denial-of-service attack. Upstream patch: <a href="http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=7932c0bd7740f4cd2aa168d3ce0199e7af7d72d5">http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=7932c0bd7740f4cd2aa168d3ce0199e7af7d72d5</a>
Credit: cve@mitre.org cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Linux kernel | <=4.1.4 | |
| 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=7932c0bd7740f4cd2aa168d3ce0199e7af7d72d5
- http://lists.opensuse.org/opensuse-security-announce/2015-10/msg00009.html
- http://lists.opensuse.org/opensuse-security-announce/2015-11/msg00035.html
- http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00013.html
- http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00038.html
- http://www.debian.org/security/2015/dsa-3364
- http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.1.5
- http://www.openwall.com/lists/oss-security/2015/08/18/3
- http://www.securityfocus.com/bid/76400
- http://www.securitytracker.com/id/1033666
- http://www.ubuntu.com/usn/USN-2748-1
- http://www.ubuntu.com/usn/USN-2749-1
- http://www.ubuntu.com/usn/USN-2751-1
- http://www.ubuntu.com/usn/USN-2752-1
- http://www.ubuntu.com/usn/USN-2759-1
- http://www.ubuntu.com/usn/USN-2760-1
- http://www.ubuntu.com/usn/USN-2777-1
- https://bugzilla.redhat.com/show_bug.cgi?id=1251839
- https://github.com/torvalds/linux/commit/7932c0bd7740f4cd2aa168d3ce0199e7af7d72d5
- https://launchpad.net/bugs/cve/CVE-2015-6252
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1251871
- https://lkml.org/lkml/2015/8/10/375
- https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=7932c0bd7740f4cd2aa168d3ce0199e7af7d72d5
- https://security-tracker.debian.org/tracker/CVE-2015-6252
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-6252
- https://nvd.nist.gov/vuln/detail/CVE-2015-6252
- https://ubuntu.com/security/CVE-2015-6252
Frequently Asked Questions
What is the vulnerability ID for this vulnerability?
The vulnerability ID for this vulnerability is CVE-2015-6252.
What is the description of CVE-2015-6252?
CVE-2015-6252 is a vulnerability in the vhost_dev_ioctl function in the Linux kernel before 4.1.5 that allows local users to cause a denial of service (memory consumption) via a VHOST_SET_LOG_FD ioctl call that triggers permanent file-descriptor allocation.
How severe is CVE-2015-6252?
CVE-2015-6252 has a severity level of low.
Which software versions are affected by CVE-2015-6252?
CVE-2015-6252 affects Linux kernel versions 3.2.0-91.129, 3.13.0-65.105, 4.2~, 3.19.0-30.33, 3.2.0-1656.78, as well as various other versions and distributions.
How can I fix CVE-2015-6252?
To fix CVE-2015-6252, you should update your Linux kernel to version 4.1.5 or later.
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