CVE-2026-22258
Last modified
CVE-2026-22258 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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. EPSS estimates a 0.48% chance of exploitation in the next 30 days.
Description
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Oisf | Suricata | < 7.0.14 |
| Oisf | Suricata | >= 8.0.0, < 8.0.3 |
References
- https://github.com/OISF/suricata/security/advisories/GHSA-289c-h599-3xcxPatch, Vendor Advisory
- https://redmine.openinfosecfoundation.org/issues/8182Issue Tracking, Permissions Required
Timeline
- Published
- Last Modified
- Status
- Analyzed
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