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CVE-2016-9555

34
FAUCET Score

CVE-2016-9555 is a critical vulnerability affecting the Linux kernel before version 4.8.8, specifically within the SCTP implementation. It stems from a lack of chunk-length checking in the sctp_sf_ootb function, allowing remote attackers to trigger an out-of-bounds slab access. This flaw carries a CVSS score of 9.8 (CRITICAL), indicating it can be exploited remotely with low complexity, potentially leading to a complete denial of service and possibly other severe impacts like confidentiality and integrity compromise. Despite its high severity, there is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
>= 3.2, < 3.2.85CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
>= 3.3, < 3.10.105CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
>= 3.11, < 3.12.68CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
>= 3.13, < 3.16.40CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
>= 3.17, < 3.18.49CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
9.14%
Probability of exploitation in next 30 days
EPSS Percentile
94.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0914 is in the 90th percentile among its peer group of 36,835 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

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 (6)

github_advisorypatch availablevia nvd_reference
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: kernel-0:2.6.32-642.15.1.el6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: kernel-rt-0:3.10.0-514.6.1.rt56.429.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: kernel-0:3.10.0-514.6.1.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise MRG 2Fixed in: kernel-rt-1:3.10.0-514.rt56.210.el6rt
View patch
redhatno patchvia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: kernel

Vendor Advisories (1)

redhatCVE-2016-9555Moderate

kernel: Slab out-of-bounds access in sctp_sf_ootb()

Oct 25, 2016

References

git.kernel.org / cgit/linux/kernel/git/torvalds/linux.git/commit
Issue TrackingPatchVendor Advisory
lists.opensuse.org / opensuse-security-announce/2016-12/msg00044.html
Mailing ListThird Party Advisory
lists.opensuse.org / opensuse-security-announce/2016-12/msg00054.html
Mailing ListThird Party Advisory
lists.opensuse.org / opensuse-security-announce/2016-12/msg00055.html
Mailing ListThird Party Advisory
lists.opensuse.org / opensuse-security-announce/2016-12/msg00056.html
Mailing ListThird Party Advisory
lists.opensuse.org / opensuse-security-announce/2016-12/msg00067.html
Mailing ListThird Party Advisory
lists.opensuse.org / opensuse-security-announce/2016-12/msg00070.html
Mailing ListThird Party Advisory
lists.opensuse.org / opensuse-security-announce/2016-12/msg00073.html
Mailing ListThird Party Advisory
lists.opensuse.org / opensuse-security-announce/2016-12/msg00076.html
Mailing ListThird Party Advisory
lists.opensuse.org / opensuse-security-announce/2016-12/msg00077.html
Mailing ListThird Party Advisory
lists.opensuse.org / opensuse-security-announce/2016-12/msg00087.html
Mailing ListThird Party Advisory
rhn.redhat.com / errata/RHSA-2017-0086.html
Third Party Advisory
rhn.redhat.com / errata/RHSA-2017-0091.html
Third Party Advisory
rhn.redhat.com / errata/RHSA-2017-0113.html
Third Party Advisory
rhn.redhat.com / errata/RHSA-2017-0307.html
Third Party Advisory
bto.bluecoat.com / security-advisory/sa134
Third Party Advisory
bugzilla.redhat.com / show_bug.cgi
Issue TrackingThird Party Advisory
github.com / torvalds/linux/commit/bf911e985d6bbaa328c20c3e05f4eb03de11fdd6
Issue TrackingPatchThird Party Advisory
groups.google.com / forum
kernel.org / pub/linux/kernel/v4.x/ChangeLog-4.8.8
Release NotesVendor Advisory
openwall.com / lists/oss-security/2016/11/22/18
Mailing ListThird Party Advisory
securityfocus.com / bid/94479
Third Party AdvisoryVDB Entry
securitytracker.com / id/1037339
Third Party AdvisoryVDB Entry