CVE-2016-9555

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2022-05-14. NVD baseline CVSS 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
9.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 9%CVSS: 9.8Exploit: NoneExposed: 0

A fix is available — apply it.

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.

CVSS v3
9.8
EG Score
9.8(medium)
EG Risk
52(Track)
EG Risk 52/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity98% × 45%
Exploitation9% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS
94.8%
KEV
Not listed

Published

November 28, 2016

Last Modified

May 6, 2026

Advisory Details (1)

Auto-updated May 8, 2026
No patch confirmed yet.
generic

sctp: validate chunk len before actually using it - kernel/git/torvalds/linux.git - Linux kernel source tree

http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=bf911e985d6bbaa328c20c3e05f4eb03de11fdd6

Patch Availability(14)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-image-3.2.0-1499-omap4 (3.2.0-1499.126) @ precise2026-05-20ubuntu
ubuntulinux-image-4.4.0-1042-snapdragon (4.4.0-1042.46) @ xenial2026-05-20ubuntu
ubuntulinux-image-extra-4.4.0-57-generic (4.4.0-57.78) @ xenial2026-05-20ubuntu
ubuntulinux-image-4.4.0-1038-raspi2 (4.4.0-1038.45) @ xenial2026-05-20ubuntu
ubuntulinux-image-extra-3.13.0-108-generic (3.13.0-108.155) @ trusty2026-05-20ubuntu
ubuntulinux-image-omap (3.2.0.121.136) @ precise2026-05-20ubuntu
ubuntulinux-image-generic-lts-trusty (3.13.0.108.99) @ precise2026-05-20ubuntu
ubuntulinux-image-4.8.0-32-lowlatency (4.8.0-32.34) @ yakkety2026-05-20ubuntu
ubuntulinux-image-raspi2 (4.8.0.1021.24) @ yakkety2026-05-20ubuntu
ubuntulinux-image-extra-4.4.0-57-generic (4.4.0-57.78~14.04.1) @ trusty2026-05-20ubuntu
redhatkernel-0:2.6.32-642.15.1.el62017-02-23redhat
redhatkernel-rt-0:3.10.0-514.6.1.rt56.429.el72017-01-17redhat
redhatkernel-0:3.10.0-514.6.1.el72017-01-17redhat
redhatkernel-rt-1:3.10.0-514.rt56.210.el6rt2017-01-17redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

All Vendor Advisories

(14)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 12× in last 7d / 41× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 112 total refreshes for this CVE.

  1. 2026-07-24 14:13 UTCEPSS rescore
  2. 2026-07-23 14:15 UTCEPSS rescore
  3. 2026-07-23 01:24 UTCEG score recompute
  4. 2026-07-22 22:04 UTCEG score recompute
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  1. 2026-07-08 14:57 UTCOSV refresh
  2. 2026-07-07 13:42 UTCEPSS rescore
  3. 2026-07-06 16:24 UTCEPSS rescore
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  5. 2026-07-06 02:20 UTCEPSS rescore
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  20. 2026-06-21 01:57 UTCEPSS rescore
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  22. 2026-06-20 02:42 UTCOSV refresh
  23. 2026-06-18 17:50 UTCEPSS rescore
  24. 2026-06-18 17:50 UTCEPSS rescore
  25. 2026-06-17 17:50 UTCEPSS rescore
  26. 2026-06-17 17:50 UTCEPSS rescore
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  46. 2026-05-31 22:28 UTCEPSS rescore
  47. 2026-05-31 22:28 UTCEPSS rescore
  48. 2026-05-31 03:55 UTCOSV refresh
  49. 2026-05-31 00:14 UTCEPSS rescore
  50. 2026-05-29 13:41 UTCEPSS rescore
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  64. 2026-05-20 11:00 UTCVendor advisory
  65. 2026-05-20 11:00 UTCGHSA enrichment
  66. 2026-05-20 07:22 UTCVendor advisory
  67. 2026-05-20 07:22 UTCGHSA enrichment
  68. 2026-05-20 03:45 UTCVendor advisory
  69. 2026-05-20 03:45 UTCGHSA enrichment
  70. 2026-05-20 00:08 UTCVendor advisory
  71. 2026-05-20 00:08 UTCGHSA enrichment
  72. 2026-05-19 20:24 UTCVendor advisory
  73. 2026-05-19 20:24 UTCGHSA enrichment
  74. 2026-05-19 16:29 UTCVendor advisory
  75. 2026-05-19 16:29 UTCGHSA enrichment

Frequently asked(5)

What is CVE-2016-9555?
CVE-2016-9555 is a critical vulnerability published on November 28, 2016. The sctpsfootb 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.
When was CVE-2016-9555 disclosed?
CVE-2016-9555 was first published in the National Vulnerability Database on November 28, 2016, with the most recent update on May 6, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2016-9555 actively exploited?
CVE-2016-9555 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 94.8% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2016-9555?
CVE-2016-9555 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2016-9555?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2016-9555, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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