CVE-2026-15422
SCTP needs to better-check INIT ACK chunk parameters
Description
The illumos SCTP inbound path performs association lookup for INIT ACK chunks without adequately validating the address parameters carried in the chunk. Since this lookup runs during packet classification (i.e. before SCTP integrity checks or IPsec policy are applied) a remote, unauthenticated attacker can send a crafted SCTP INIT ACK packet with malformed address parameters to cause an out-of-bounds access and kernel heap corruption, which may lead to remote code execution. The flaw has existed since 2010 (illumos-gate commit a5407c02), and affects any illumos distribution prior to illumos-gate commit 53a3efde.
INFO
Published Date :
July 16, 2026, 8:16 p.m.
Last Modified :
July 16, 2026, 8:16 p.m.
Remotely Exploit :
Yes !
Source :
0ca53633-f0b5-4853-ba72-e0a2e62000d0
Affected Products
The following products are affected by CVE-2026-15422
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 4.0 | CRITICAL | 0ca53633-f0b5-4853-ba72-e0a2e62000d0 | ||||
| CVSS 4.0 | CRITICAL | 0ca53633-f0b5-4853-ba72-e0a2e62000d0 |
Solution
- Update illumos to include commit 53a3efde or later.
- Apply security patches for SCTP.
- Review SCTP configuration for security settings.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-15422.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-15422 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-15422
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-15422 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-15422 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
New CVE Received by 0ca53633-f0b5-4853-ba72-e0a2e62000d0
Jul. 16, 2026
Action Type Old Value New Value Added Affected [{'repo': 'https://github.com/illumos/illumos-gate', 'vendor': 'illumos', 'modules': ['kernel', 'SCTP'], 'product': 'illumos-gate', 'versions': [{'status': 'affected', 'changes': [{'at': '53a3efdeff8e6745bbfb69c5360f94962fb79e75', 'status': 'unaffected'}], 'version': 'a5407c02d5ed61b29481b9b71f1307d7ebec9e5c', 'lessThan': '53a3efdeff8e6745bbfb69c5360f94962fb79e75', 'versionType': 'git'}], 'programFiles': ['usr/src/uts/common/inet/sctp/sctp_hash.c'], 'defaultStatus': 'affected'}, {'vendor': 'OmniOS', 'product': 'OmniOS', 'versions': [{'status': 'affected', 'changes': [{'at': 'r151058j', 'status': 'unaffected'}], 'version': 'r151058', 'lessThan': 'r151058j', 'versionType': 'custom'}, {'status': 'affected', 'changes': [{'at': 'r151056aj', 'status': 'unaffected'}], 'version': 'r151056', 'lessThan': 'r151056aj', 'versionType': 'custom'}, {'status': 'affected', 'changes': [{'at': 'r151054bj', 'status': 'unaffected'}], 'version': 'r151054', 'lessThan': 'r151054bj', 'versionType': 'custom'}, {'status': 'affected', 'version': 'any', 'lessThan': 'r151054', 'versionType': 'custom'}], 'defaultStatus': 'affected'}, {'vendor': 'Triton Data Center', 'product': 'SmartOS', 'versions': [{'status': 'affected', 'changes': [{'at': '20260709', 'status': 'unaffected'}], 'version': 'any', 'lessThan': '202060709', 'versionType': 'custom'}], 'defaultStatus': 'affected'}] Added Description The illumos SCTP inbound path performs association lookup for INIT ACK chunks without adequately validating the address parameters carried in the chunk. Since this lookup runs during packet classification (i.e. before SCTP integrity checks or IPsec policy are applied) a remote, unauthenticated attacker can send a crafted SCTP INIT ACK packet with malformed address parameters to cause an out-of-bounds access and kernel heap corruption, which may lead to remote code execution. The flaw has existed since 2010 (illumos-gate commit a5407c02), and affects any illumos distribution prior to illumos-gate commit 53a3efde. Added CVSS V4.0 AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:U/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:P/AU:Y/R:U/V:C/RE:H/U:Red Added CWE CWE-787 Added CWE CWE-122 Added Reference https://github.com/illumos/illumos-gate/commit/53a3efdeff8e6745bbfb69c5360f94962fb79e75 Added Reference https://illumos.org/issues/18117 Added Reference https://illumos.topicbox.com/groups/developer/Ta1a8e2e1f7f928df/18117-sctp-needs-to-better-check-init-ack-chunk-parameters