CVE-2026-15422 SCTP needs to better-check INIT ACK chunk parameters
A remote attacker can trigger kernel heap corruption via crafted SCTP packets, potentially achieving remote code execution on illumos systems.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-15422?
CVE-2026-15422 is a critical memory corruption vulnerability in OmniOS, published on 16 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
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.
Which versions are affected by CVE-2026-15422?
How do I fix CVE-2026-15422?
No fix has been published for CVE-2026-15422 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-15422 being exploited?
There is no known exploitation of CVE-2026-15422 in the wild and no public exploit code.
Sources
Also known as GHSA-7fj7-gprr-x7fm.