Vulnerability Details : CVE-2016-9806
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.
Vulnerability category: Memory CorruptionDenial of service
Products affected by CVE-2016-9806
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2016-9806
0.04%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 6 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2016-9806
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
7.2
|
HIGH | AV:L/AC:L/Au:N/C:C/I:C/A:C |
3.9
|
10.0
|
NIST | |
|
7.8
|
HIGH | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
1.8
|
5.9
|
NIST |
CWE ids for CVE-2016-9806
-
The product contains a concurrent code sequence that requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence operating concurrently.Assigned by: nvd@nist.gov (Primary)
-
The product calls free() twice on the same memory address, potentially leading to modification of unexpected memory locations.Assigned by: nvd@nist.gov (Primary)
References for CVE-2016-9806
-
http://www.openwall.com/lists/oss-security/2016/12/03/4
oss-security - CVE Request: -- Linux kernel: double free in netlink_dumpMailing List;Patch;Third Party Advisory
-
https://github.com/torvalds/linux/commit/92964c79b357efd980812c4de5c1fd2ec8bb5520
netlink: Fix dump skb leak/double free · torvalds/linux@92964c7 · GitHubPatch;Third Party Advisory
-
https://bugzilla.redhat.com/show_bug.cgi?id=1401502
1401502 – (CVE-2016-9806) CVE-2016-9806 kernel: netlink: double-free in netlink_dumpIssue Tracking;Patch
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https://access.redhat.com/errata/RHSA-2017:1842
RHSA-2017:1842 - Security Advisory - Red Hat Customer PortalThird Party Advisory
-
https://access.redhat.com/errata/RHSA-2017:2077
RHSA-2017:2077 - Security Advisory - Red Hat Customer PortalThird Party Advisory
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http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=92964c79b357efd980812c4de5c1fd2ec8bb5520
kernel/git/torvalds/linux.git - Linux kernel source treePatch;Vendor Advisory
-
http://lists.openwall.net/netdev/2016/05/15/69
netdev - BUG: use-after-free in netlink_dumpMailing List;Third Party Advisory
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https://source.android.com/security/bulletin/2017-03-01.html
Android Security Bulletin—March 2017 | Android Open Source ProjectThird Party Advisory
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http://www.securityfocus.com/bid/94653
Linux Kernel CVE-2016-9806 Local Denial of Service VulnerabilityThird Party Advisory;VDB Entry
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https://access.redhat.com/errata/RHSA-2017:2669
RHSA-2017:2669 - Security Advisory - Red Hat Customer PortalThird Party Advisory
-
http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.6.3
Release Notes;Vendor Advisory
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http://www.securitytracker.com/id/1037968
Android Multiple Flaws Let Users Deny Service, Obtain Potentially Sensitive Information, and Gain Elevated Privileges and Let Remote Users Execute Arbitrary Code - SecurityTrackerThird Party Advisory;VDB Entry
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