No exploitation reportedFix available

CVE-2016-9555

Q: Is CVE-2016-9555 actively exploited?

Active exploitation of CVE-2016-9555 has not been confirmed. Its EPSS score was 10.0% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

Q: What is the CVSS score for CVE-2016-9555?

CVE-2016-9555 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

No exploitation reported by the sources we read.

Published2016-11-28
Fixed in4.8.8 · 4.4.32 · 3.18.49 · 3.16.40 · 3.12.68 · 3.10.105
WeaknessCWE-125

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

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.

Timeline

dates in UTC

2016-11-2803:59CVE publishedNVD
2026-10-2319:23EPSS crossed 10 %FIRST EPSS

Observed activity

isMalicious corpus · updated 2026-10-23 18:48 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2016-9555?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2016-9555?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD

Linux linux kernel

Branch	Affected	Fixed in	Source
4.x	≥ 4.5.0, < 4.8.8	4.8.8	NVD
4.4	≥ 3.19, < 4.4.32	4.4.32	NVD
3.x	≥ 3.17, < 3.18.49	3.18.49	NVD
3.x	≥ 3.13, < 3.16.40	3.16.40	NVD
3.x	≥ 3.11, < 3.12.68	3.12.68	NVD
3.x	≥ 3.3, < 3.10.105	3.10.105	NVD
3.2	≥ 3.2, < 3.2.85	3.2.85	NVD

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

Update Linux linux kernel to 4.8.8 · 4.4.32 · 3.18.49 · 3.16.40 · 3.12.68 · 3.10.105 · 3.2.85

Advisories and patches

git.kernel.orgPatch · Vendor Advisory
www.kernel.orgRelease Notes · Vendor Advisory
github.comPatch

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

NVDCVSS 3.19.8read 2026-10-23
NVDCVSS 2.010read 2026-10-23
NVDweakness (CWE)CWE-125read 2026-10-23
FIRST EPSSEPSS score10.0 %read 2026-10-23

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published: 2016-11-28
Last Modified: 2026-06-17
NVD status: Modified

Frequently asked questions

What is CVE-2016-9555?

Is CVE-2016-9555 actively exploited?

Active exploitation of CVE-2016-9555 has not been confirmed. Its EPSS score was 10.0% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2016-9555?

CVE-2016-9555 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

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