Suricata CVE-2026-22258
HIGHCVSS VectorNVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
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3DescriptionNVD
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.
AnalysisAI
Uncontrolled buffer expansion in Suricata's DCERPC parser allows remote attackers to trigger unbounded memory allocation and cause denial of service by sending specially crafted DCERPC traffic. The vulnerability affects versions prior to 8.0.3 and 7.0.14 across DCERPC/UDP, DCERPC/TCP, and SMB protocols, with TCP being partially protected by default stream depth limits. …
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RemediationAI
Within 24 hours: Verify which systems run affected Suricata versions (pre-8.0.3 and pre-7.0.14) and assess criticality. Within 7 days: Deploy available patches to all Suricata instances; prioritize production IDS/IPS sensors and NSM deployments. …
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