Denial of service via quadratic DCERPC buffering
Published Apr 2, 2026 · Updated Apr 2, 2026
Algorithmic-complexity denial of service in Suricata before 7.0.15 allows remote attackers to degrade processing via crafted DCERPC traffic. The DCERPC parser's buffering algorithm performs work that grows quadratically with accumulated input; vendor material does not identify the exact function or copy sequence. Exploitation requires Suricata to inspect attacker-controlled DCERPC traffic and causes processing degradation, with no reported data disclosure or modification.
Summary
What happened
Algorithmic-complexity denial of service in Suricata before 7.0.15 allows remote attackers to degrade processing via crafted DCERPC traffic. The DCERPC parser's buffering algorithm performs work that grows quadratically with accumulated input; vendor material does not identify the exact function or copy sequence. Exploitation requires Suricata to inspect attacker-controlled DCERPC traffic and causes processing degradation, with no reported data disclosure or modification.
The record
- CVE
- CVE-2026-31937
- Published
- Apr 2, 2026
- Updated
- Apr 2, 2026
- Vendor
- Open Information Security Foundation
- Product
- Suricata
- Classifications
- CWE-407, T1499.004
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Apr 2, 2026CVE publishedPublication date reported by the CVE source.
- Apr 2, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
Compare your product and version with the public record. A matching version still requires validation against your environment.
Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=< 7.0.15
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
See the directory against your own environment.
Your stack
Check the software in your environment
Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.
Book a demo