illumos SCTP lookup address heap-based overflow

Summaryinfo

A vulnerability, which was classified as very critical, was found in illumos. Impacted is the function lookup of the component SCTP Handler. The manipulation of the argument address results in heap-based overflow. This vulnerability is identified as CVE-2026-15422. The attack can be executed remotely. There is not any exploit available.

Detailsinfo

A vulnerability was found in illumos (affected version not known). It has been classified as very critical. Affected is the function lookup of the component SCTP Handler. The manipulation of the argument address with an unknown input leads to a heap-based overflow vulnerability. CWE is classifying the issue as CWE-122. A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc(). This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

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.

The advisory is available at illumos.topicbox.com. This vulnerability is traded as CVE-2026-15422 since 07/10/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Technical details are known, but there is no available exploit. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 07/16/2026).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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• illumos

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CPE 2.2info

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If you want to get best quality of vulnerability data, you may have to visit VulDB.

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