CVE-2026-15422
CriticalCVSS 9.1Exploitation Probability (EPSS)
Low risk40th percentile - higher than 40% of all known CVEs
Summary
In the illumos SCTP inbound path, association lookup for INIT ACK chunks is performed without adequate validation of address parameters. A remote attacker can send a crafted SCTP INIT ACK packet, causing out-of-bounds access and kernel heap corruption, potentially leading to remote code execution.
Risk Assessment
This vulnerability allows a remote, unauthenticated attacker to execute arbitrary code in the kernel, potentially leading to full system compromise.
Recommendation
Immediately update the illumos system to a version containing commit 53a3efde or later, which fixes this vulnerability.
Original NVD description (English source)
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.