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CVE-2016-0728

36
FAUCET Score

CVE-2016-0728 is a critical vulnerability in the Linux kernel's join_session_keyring function (versions prior to 4.4.1) affecting various distributions including Canonical, Debian, Google, and HP. This flaw, stemming from mishandled object references, allows local users to achieve privilege escalation or cause a denial of service through crafted keyctl commands. With a CVSS score of 7.8 (High), it presents a low-complexity attack vector that can lead to full compromise of confidentiality, integrity, and availability. While not on the KEV catalog, exploit code is publicly available on ExploitDB, and it has garnered significant community discussion and media coverage, indicating its potential for exploitation.

Impacted Technologies

VendorProductVersion(s)CPE
4.0CPE matchmatch criteria
cpe:2.3:o:google:android:4.0:*:*:*:*:*:*:*
4.0.1CPE matchmatch criteria
cpe:2.3:o:google:android:4.0.1:*:*:*:*:*:*:*
4.0.2CPE matchmatch criteria
cpe:2.3:o:google:android:4.0.2:*:*:*:*:*:*:*
4.0.3CPE matchmatch criteria
cpe:2.3:o:google:android:4.0.3:*:*:*:*:*:*:*
4.0.4CPE matchmatch criteria
cpe:2.3:o:google:android:4.0.4:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.8HIGH

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
1.8
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
3.65%
Probability of exploitation in next 30 days
EPSS Percentile
88.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-24
Model: v2026.06.15
ExploitDB: EDB-39277 · Jan 19, 2016
This CVE's current EPSS score of 0.0365 is in the 98th percentile among its peer group of 16,974 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.2 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (5)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: kernel-rt-0:3.10.0-327.4.5.rt56.206.el7_2
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: kernel-0:3.10.0-327.4.5.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7.1 Extended Update SupportFixed in: kernel-0:3.10.0-229.26.2.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise MRG 2Fixed in: kernel-rt-1:3.10.0-327.rt56.170.el6rt
View patch
googlevendor investigatingvia nvd_reference
View patch

Vendor Advisories (1)

redhatCVE-2016-0728Important

kernel: Possible use-after-free vulnerability in keyring facility

Jan 19, 2016

References

git.kernel.org / cgit/linux/kernel/git/torvalds/linux.git/commit
Vendor Advisory
lists.fedoraproject.org / pipermail/package-announce/2016-February/176484.html
Mailing ListThird Party Advisory
lists.fedoraproject.org / pipermail/package-announce/2016-January/176194.html
Mailing ListThird Party Advisory
lists.opensuse.org / opensuse-security-announce/2016-01/msg00026.html
Mailing ListThird Party Advisory
lists.opensuse.org / opensuse-security-announce/2016-02/msg00012.html
Mailing ListThird Party Advisory
lists.opensuse.org / opensuse-security-announce/2016-03/msg00033.html
Mailing ListThird Party Advisory
lists.opensuse.org / opensuse-security-announce/2016-03/msg00034.html
Mailing ListThird Party Advisory
lists.opensuse.org / opensuse-security-announce/2016-03/msg00035.html
Mailing ListThird Party Advisory
lists.opensuse.org / opensuse-security-announce/2016-03/msg00038.html
Mailing ListThird Party Advisory
lists.opensuse.org / opensuse-security-announce/2016-03/msg00039.html
Mailing ListThird Party Advisory
lists.opensuse.org / opensuse-security-announce/2016-03/msg00040.html
Mailing ListThird Party Advisory
lists.opensuse.org / opensuse-security-announce/2016-03/msg00041.html
Mailing ListThird Party Advisory
lists.opensuse.org / opensuse-security-announce/2016-03/msg00043.html
Mailing ListThird Party Advisory
lists.opensuse.org / opensuse-security-announce/2016-03/msg00044.html
Mailing ListThird Party Advisory
lists.opensuse.org / opensuse-security-announce/2016-03/msg00045.html
Mailing ListThird Party Advisory
perception-point.io / 2016/01/14/analysis-and-exploitation-of-a-linux-kernel-vulnerability-cve-2016-0728
Third Party Advisory
rhn.redhat.com / errata/RHSA-2016-0064.html
Third Party Advisory
rhn.redhat.com / errata/RHSA-2016-0065.html
Third Party Advisory
rhn.redhat.com / errata/RHSA-2016-0068.html
Third Party Advisory
bto.bluecoat.com / security-advisory/sa112
Third Party Advisory
bugzilla.redhat.com / show_bug.cgi
Issue TrackingThird Party Advisory
github.com / torvalds/linux/commit/23567fd052a9abb6d67fe8e7a9ccdd9800a540f2
Third Party Advisory
h20565.www2.hp.com / portal/site/hpsc/public/kb/docDisplay
Third Party Advisory
h20566.www2.hpe.com / portal/site/hpsc/public/kb/docDisplay
Third Party Advisory
h20566.www2.hpe.com / portal/site/hpsc/public/kb/docDisplay
Third Party Advisory
source.android.com / security/bulletin/2016-03-01.html
Vendor Advisory
security.netapp.com / advisory/ntap-20160211-0001
Third Party Advisory
exploit-db.com / exploits/39277
Third Party AdvisoryVDB Entry
debian.org / security/2016/dsa-3448
Third Party Advisory
kernel.org / pub/linux/kernel/v4.x/ChangeLog-4.4.1
Vendor Advisory
openwall.com / lists/oss-security/2016/01/19/2
Mailing ListThird Party Advisory
oracle.com / technetwork/topics/security/linuxbulletinjan2016-2867209.html
Third Party Advisory
securityfocus.com / bid/81054
Third Party AdvisoryVDB Entry
securitytracker.com / id/1034701
Third Party AdvisoryVDB Entry
ubuntu.com / usn/USN-2870-1
Third Party Advisory
ubuntu.com / usn/USN-2870-2
Third Party Advisory
ubuntu.com / usn/USN-2871-1
Third Party Advisory
ubuntu.com / usn/USN-2871-2
Third Party Advisory
ubuntu.com / usn/USN-2872-1
Third Party Advisory
ubuntu.com / usn/USN-2872-2
Third Party Advisory
ubuntu.com / usn/USN-2872-3
Third Party Advisory
ubuntu.com / usn/USN-2873-1
Third Party Advisory