Vulnerability · Published Jul 16, 2026 · Assigned by illumos
CVE-2026-15422SCTP needs to better-check INIT ACK chunk parameters
Critical 9.1
In plain English
A critical-severity heap buffer overflow in illumos-gate from illumos. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.9% (higher than 59% of all known vulnerabilities).
Official 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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| illumos | illumos-gate | a5407c02d5ed61b29481b9b71f1307d7ebec9e5c – before 53a3efdeff8e6745bbfb69c5360f94962fb79e75 |
| OmniOS | OmniOS | r151058 – before r151058jr151056 – before r151056ajr151054 – before r151054bjany – before r151054 |
| Triton Data Center | SmartOS | any – before 202060709 |
Weakness: CWE-122, CWE-787 · Vector: CVSS: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/S:P/AU:Y/R:U/V:C/RE:H/U:Red