CVE-2026-22258: Oisf Suricata

High severity, CVSS 7.5. EPSS: 0.6% chance of exploitation in the next 30 days.

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.

Affected products

• Oisf Suricata: before 7.0.14 (fixed in 7.0.14); from 8.0.0, before 8.0.3 (fixed in 8.0.3)

Published 2026-01-27. Last modified 2026-06-17.