CVE-2026-15422Network attack vector

Pre-authentication kernel corruption via undersized SCTP parameters

Published Jul 16, 2026 · Updated Jul 16, 2026

Heap-based out-of-bounds write in illumos-gate before commit 53a3efde allows remote attackers to corrupt kernel memory via SCTP INIT ACK. The sctp_addrlist2sctp association lookup accepts IPv4 and IPv6 parameters without requiring the protocol-defined 8-byte and 20-byte lengths, then reads them as complete addresses. Classification precedes SCTP integrity and IPsec policy checks, so no association or authentication is required; kernel code execution is a downstream risk.

CVSS severityUnavailable
Unscored
EPSS probability0.88%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Heap-based out-of-bounds write in illumos-gate before commit 53a3efde allows remote attackers to corrupt kernel memory via SCTP INIT ACK. The sctp_addrlist2sctp association lookup accepts IPv4 and IPv6 parameters without requiring the protocol-defined 8-byte and 20-byte lengths, then reads them as complete addresses. Classification precedes SCTP integrity and IPsec policy checks, so no association or authentication is required; kernel code execution is a downstream risk.

The record

CVE
CVE-2026-15422
Published
Jul 16, 2026
Updated
Jul 16, 2026
Vendor
OmniOS Community Edition Association
Product
OmniOS
Classifications
CWE-787, CWE-122, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 16, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 16, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=any <r151054
  2. Affected versionversion=r151054 <r151054bj changes=[{"at":"r151054bj","status":"unaffected"}]
  3. Affected versionversion=r151056 <r151056aj changes=[{"at":"r151056aj","status":"unaffected"}]
  4. Affected versionversion=r151058 <r151058j changes=[{"at":"r151058j","status":"unaffected"}]

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

OmniOS Community Edition Association · OmniOSversion=any <r151054; version=r151054 <r151054bj changes=[{"at":"r151054bj","status":"unaffected"}]; version=r151056 <r151056aj changes=[{"at":"r151056aj","status":"unaffected"}]; version=r151058 <r151058j changes=[{"at":"r151058j","status":"unaffected"}]
Triton DataCenter · SmartOSversion=any <202060709 changes=[{"at":"20260709","status":"unaffected"}]
illumos · illumos-gateversion=a5407c02d5ed61b29481b9b71f1307d7ebec9e5c <53a3efdeff8e6745bbfb69c5360f94962fb79e75 changes=[{"at":"53a3efdeff8e6745bbfb69c5360f94962fb79e75","status":"unaffected"}]

Published CVSS scores

9.1illumosCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:U

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-787Out-of-bounds Write
CWE-122Heap-based Buffer Overflow
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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