CVE-2026-22258

Suricata is a network IDS, IPS and NSM engine. Prior to versions 8.0.3 and 7.0.14, crafted DCERPC traffic can cause Suricata to expand a buffer w/o limits, leading to memory exhaustion and the process getting killed. While reported for DCERPC over UDP, it is believed that DCERPC over TCP and SMB are also vulnerable. DCERPC/TCP in the default configuration should not be vulnerable as the default stream depth is limited to 1MiB. Versions 8.0.3 and 7.0.14 contain a patch. Some workarounds are available. For DCERPC/UDP, disable the parser. For DCERPC/TCP, the `stream.reassembly.depth` setting will limit the amount of data that can be buffered. For DCERPC/SMB, the `stream.reassembly.depth` can be used as well, but is set to unlimited by default. Imposing a limit here may lead to loss of visibility in SMB.

The following products are affected by CVE-2026-22258 vulnerability.

Here, you will find a curated list of external links that provide in-depth information to CVE-2026-22258.

URL	Resource
https://github.com/OISF/suricata/commit/39d8c302af3422a096b75474a4f295a754ec6a74
https://github.com/OISF/suricata/commit/f82a388d0283725cb76782cf64e8341cab370830
https://github.com/OISF/suricata/security/advisories/GHSA-289c-h599-3xcx
https://redmine.openinfosecfoundation.org/issues/8182