Bug 2433423 (CVE-2026-22258) - CVE-2026-22258 suricata: Suricata DCERPC: unbounded fragment buffering leads to memory exhaustion
Summary: CVE-2026-22258 suricata: Suricata DCERPC: unbounded fragment buffering leads ...
Keywords:
Status: NEW
Alias: CVE-2026-22258
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
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Whiteboard:
Depends On: 2433494 2433495 2433496 2433497 2433498
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-01-27 17:02 UTC by OSIDB Bzimport
Modified: 2026-01-27 20:05 UTC (History)
0 users

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Description OSIDB Bzimport 2026-01-27 17:02:32 UTC 
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.
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