CVE-2016-9806

Description

Race condition in the netlink_dump function in net/netlink/af_netlink.c in the Linux kernel before 4.6.3 allows local users to cause a denial of service (double free) or possibly have unspecified other impact via a crafted application that makes sendmsg system calls, leading to a free operation associated with a new dump that started earlier than anticipated.

Category

7.8
CVSS
Severity: High
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.05%
Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory kernel.org Vendor Advisory kernel.org
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
http://www.securityfocus.com/bid/94653 vdb entry third party advisory
http://www.securitytracker.com/id/1037968 vdb entry third party advisory
http://www.openwall.com/lists/oss-security/2016/12/03/4 mailing list third party advisory patch
https://access.redhat.com/errata/RHSA-2017:2669 third party advisory vendor advisory
https://github.com/torvalds/linux/commit/92964c79b357efd980812c4de5c1fd2ec8bb5520 third party advisory patch
http://lists.openwall.net/netdev/2016/05/15/69 third party advisory mailing list
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=92964c79b357efd980812c4de5c1fd2ec8bb5520 patch vendor advisory
https://access.redhat.com/errata/RHSA-2017:2077 third party advisory vendor advisory
https://access.redhat.com/errata/RHSA-2017:1842 third party advisory vendor advisory
https://source.android.com/security/bulletin/2017-03-01.html third party advisory
http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.6.3 release notes vendor advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1401502 issue tracking patch

Frequently Asked Questions

What is the severity of CVE-2016-9806?
CVE-2016-9806 has been scored as a high severity vulnerability.
How to fix CVE-2016-9806?
To fix CVE-2016-9806, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2016-9806 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2016-9806 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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