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CVE-2016-3951

19
FAUCET Score

CVE-2016-3951 describes a double free vulnerability in the Linux kernel's cdc_ncm.c driver, affecting versions prior to 4.5, as well as Canonical, Novell, and SUSE distributions. This flaw allows a physically proximate attacker to trigger a denial of service (system crash) or potentially other unspecified impacts by inserting a USB device with a malformed descriptor. Rated Medium with a CVSSv3 score of 4.6, the attack requires physical access and has low complexity, leading to high availability impact. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
12.04CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:lts:*:*:*
14.04CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*
15.10CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:15.10:*:*:*:*:*:*:*
12.0CPE matchmatch criteria
cpe:2.3:a:novell:suse_linux_enterprise_software_development_kit:12.0:sp1:*:*:*:*:*:*
12.0CPE matchmatch criteria
cpe:2.3:a:suse:suse_linux_enterprise_software_development_kit:12.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

4.6MEDIUM

CVSS:3.0/AV:P/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector
PHYSICAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
0.9
Impact Score
3.6
CvssVersion
3.0

Exploit Intelligence

EPSS Score
0.59%
Probability of exploitation in next 30 days
EPSS Percentile
44.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0059 is in the 83rd percentile among its peer group of 1,532 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.2 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Patches (6)

github_advisoryvendor investigatingvia nvd_reference
View patch
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: kernel
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: kernel
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: kernel
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: kernel-rt
redhatend of lifevia redhat_api
Product: Red Hat Enterprise MRG 2Fixed in: realtime-kernel

Vendor Advisories (1)

redhatCVE-2016-3951Low

kernel: crash on invalid USB device descriptors (usbnet driver)

Mar 4, 2016

References

git.kernel.org / cgit/linux/kernel/git/torvalds/linux.git/commit
Vendor Advisory
git.kernel.org / cgit/linux/kernel/git/torvalds/linux.git/commit
Vendor Advisory
lists.opensuse.org / opensuse-security-announce/2016-05/msg00060.html
lists.opensuse.org / opensuse-security-announce/2016-06/msg00054.html
Third Party Advisory
lists.opensuse.org / opensuse-security-announce/2016-06/msg00056.html
Third Party Advisory
lists.opensuse.org / opensuse-security-announce/2016-07/msg00005.html
Third Party Advisory
bugzilla.redhat.com / show_bug.cgi
Issue Tracking
github.com / torvalds/linux/commit/1666984c8625b3db19a9abc298931d35ab7bc64b
Vendor Advisory
github.com / torvalds/linux/commit/4d06dd537f95683aba3651098ae288b7cbff8274
Vendor Advisory
spinics.net / lists/netdev/msg367669.html
debian.org / security/2016/dsa-3607
openwall.com / lists/oss-security/2016/04/06/4
securityfocus.com / bid/91028
securitytracker.com / id/1036763
ubuntu.com / usn/USN-2989-1
Third Party Advisory
ubuntu.com / usn/USN-2998-1
Third Party Advisory
ubuntu.com / usn/USN-3000-1
Third Party Advisory
ubuntu.com / usn/USN-3001-1
Third Party Advisory
ubuntu.com / usn/USN-3002-1
Third Party Advisory
ubuntu.com / usn/USN-3003-1
Third Party Advisory
ubuntu.com / usn/USN-3004-1
Third Party Advisory
ubuntu.com / usn/USN-3021-1
Third Party Advisory
ubuntu.com / usn/USN-3021-2
Third Party Advisory