CVE-2016-9555

Name: CVE-2016-9555
Creator: NVD / NIST
Published: 2016-11-28T03:59:17.097+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 9.14%

Last modified Jun 17, 2026

CVE-2016-9555 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. The sctp_sf_ootb function in net/sctp/sm_statefuns.c in the Linux kernel before 4.8.8 lacks chunk-length checking for the first chunk, which allows remote attackers to cause a denial of service (out-of-bounds slab access) or possibly have unspecified other impact via crafted SCTP data.. EPSS estimates a 9.14% chance of exploitation in the next 30 days.

Description

The sctp_sf_ootb function in net/sctp/sm_statefuns.c in the Linux kernel before 4.8.8 lacks chunk-length checking for the first chunk, which allows remote attackers to cause a denial of service (out-of-bounds slab access) or possibly have unspecified other impact via crafted SCTP data.

Metrics

CVSS 3.1

9.8/10

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

EPSS Probability

9.14%

94.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-125

Affected Software

Vendor	Product	Versions
Linux	Linux Kernel	>= 3.2, < 3.2.85
Linux	Linux Kernel	>= 3.3, < 3.10.105
Linux	Linux Kernel	>= 3.11, < 3.12.68
Linux	Linux Kernel	>= 3.13, < 3.16.40
Linux	Linux Kernel	>= 3.17, < 3.18.49
Linux	Linux Kernel	>= 3.19, < 4.4.32
Linux	Linux Kernel	>= 4.5.0, < 4.8.8

References

http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=bf911e985d6bbaa328c20c3e05f4eb03de11fdd6Issue Tracking, Patch, Vendor Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00044.htmlMailing List, Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00054.htmlMailing List, Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00055.htmlMailing List, Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00056.htmlMailing List, Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00067.htmlMailing List, Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00070.htmlMailing List, Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00073.htmlMailing List, Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00076.htmlMailing List, Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00077.htmlMailing List, Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00087.htmlMailing List, Third Party Advisory
http://rhn.redhat.com/errata/RHSA-2017-0086.htmlThird Party Advisory
http://rhn.redhat.com/errata/RHSA-2017-0091.htmlThird Party Advisory
http://rhn.redhat.com/errata/RHSA-2017-0113.htmlThird Party Advisory
http://rhn.redhat.com/errata/RHSA-2017-0307.htmlThird Party Advisory
http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.8.8Release Notes, Vendor Advisory
http://www.openwall.com/lists/oss-security/2016/11/22/18Mailing List, Third Party Advisory
http://www.securityfocus.com/bid/94479Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1037339Third Party Advisory, VDB Entry
https://bto.bluecoat.com/security-advisory/sa134Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1397930Issue Tracking, Third Party Advisory
https://github.com/torvalds/linux/commit/bf911e985d6bbaa328c20c3e05f4eb03de11fdd6Issue Tracking, Patch, Third Party Advisory
https://groups.google.com/forum/#%21topic/syzkaller/pAUcHsUJbjk
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=bf911e985d6bbaa328c20c3e05f4eb03de11fdd6Issue Tracking, Patch, Vendor Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00044.htmlMailing List, Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00054.htmlMailing List, Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00055.htmlMailing List, Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00056.htmlMailing List, Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00067.htmlMailing List, Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00070.htmlMailing List, Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00073.htmlMailing List, Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00076.htmlMailing List, Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00077.htmlMailing List, Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-12/msg00087.htmlMailing List, Third Party Advisory
http://rhn.redhat.com/errata/RHSA-2017-0086.htmlThird Party Advisory
http://rhn.redhat.com/errata/RHSA-2017-0091.htmlThird Party Advisory
http://rhn.redhat.com/errata/RHSA-2017-0113.htmlThird Party Advisory
http://rhn.redhat.com/errata/RHSA-2017-0307.htmlThird Party Advisory
http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.8.8Release Notes, Vendor Advisory
http://www.openwall.com/lists/oss-security/2016/11/22/18Mailing List, Third Party Advisory
http://www.securityfocus.com/bid/94479Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1037339Third Party Advisory, VDB Entry
https://bto.bluecoat.com/security-advisory/sa134Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1397930Issue Tracking, Third Party Advisory
https://github.com/torvalds/linux/commit/bf911e985d6bbaa328c20c3e05f4eb03de11fdd6Issue Tracking, Patch, Third Party Advisory
https://groups.google.com/forum/#%21topic/syzkaller/pAUcHsUJbjk

Timeline

Published: Nov 28, 2016
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2016-9555?

How severe is CVE-2016-9555?

CVE-2016-9555 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 9.14% probability of exploitation in the next 30 days.

How do I fix CVE-2016-9555?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2016-9555?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST