7.5
High
CVE-2026-71418 Suricata is a network Intrusion Detection System, Intrusion Prevention System and Network Security Monitoring engine
Description
Suricata is a network Intrusion Detection System, Intrusion Prevention System and Network Security Monitoring engine. From 8.0.0 until 8.0.6, DNS-over-HTTP/2 processing in rust/src/http2/http2.rs retains previously processed HTTP/2 DATA frame contents instead of clearing the internal buffer. Multiple DATA frames with the EndOfStream flag set can grow the buffer to its 65 KiB limit while causing all prior contents to be processed again, producing quadratic CPU complexity, degraded packet processing, loss of monitoring visibility, or denial of service. This issue is fixed in version 8.0.6.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| suricata 8.0 | 8.0.0 → < 8.0.6 | 8.0.6 |
Other CVEs of suricata
The 86 CVEs of suricata →
CVE-2026-94084
Suricata before 8.0.7 has an Http2ThreadMultiBuf use-after-free when a transaction is inspected by rules that use…
9.4
Critical
CVE-2026-94083
Suricata before 8.0.7 has a DoH2 type confusion that can cause an invalid free, because cleanup code for the HTTP2 state…
9.4
Critical
CVE-2026-71855
Suricata is a network Intrusion Detection System, Intrusion Prevention System and Network Security Monitoring engine
5.9
Medium
CVE-2026-57223
Suricata is a network Intrusion Detection System, Intrusion Prevention System and Network Security Monitoring engine
7.0
High