What is the CVSS score of CVE-2026-22258?

CVE-2026-22258 has a CVSS 3.1 base score of 7.5 (High). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H. EPSS exploitation probability: 0.1%.

Which versions of Suricata are affected by CVE-2026-22258?

Suricata instances are vulnerable to denial-of-service attacks via malicious DCERPC traffic that exhausts server memory and crashes the process.. A patch is available.

How to fix or mitigate CVE-2026-22258?

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. Within 30 days: Validate patch deployment, confirm normal operation across all sensors, and document completion in change management systems.

Suricata CVE-2026-22258

HIGH

Uncontrolled Resource Consumption (CWE-400)

2026-01-27 security-advisories@github.com

Denial Of Service Suricata Suse

7.5

CVSS 3.1 · GitHub Advisory

Severity by source

GitHub Advisory PRIMARY

7.5 HIGH

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

SUSE

HIGH

qualitative

Primary rating from GitHub Advisory.

CVSS VectorGitHub Advisory

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Lifecycle Timeline

Analysis Generated

Mar 12, 2026 - 21:55 vuln.today

Patch released

Jan 30, 2026 - 20:09 nvd

Patch available

CVE Published

Jan 27, 2026 - 17:16 nvd

HIGH 7.5

DescriptionGitHub Advisory

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. Patches are available, and administrators can mitigate by disabling vulnerable parsers or configuring stream reassembly depth limits.

Technical ContextAI

Classified as CWE-400 (Uncontrolled Resource Consumption). Affects Suricata. 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 avail