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Vulnerability · Published Sep 18, 2026 · Assigned by GitHub_M

CVE-2026-63451Suricata detect: frame rules without content and with transform can cause heap buffer overflow during rule load

Low 3.3

In plain English

A low-severity heap buffer overflow in suricata from OISF. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 4% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)3.3Low
Exploit odds (30 days)0.1%top 95.8% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

Suricata is a network Intrusion Detection System, Intrusion Prevention System and Network Security Monitoring engine. From 8.0.0 until 8.0.6, a locally supplied detection rule that combines frame inspection without content and a transformed match without content can make src/detect-engine-prefilter.c select multiple non-prefilter frame engines while preparing signatures for non-prefilter inspection. Loading the crafted rule, including in test mode, can trigger a heap buffer overflow and crash Suricata; network traffic alone cannot reach the flaw. This issue is fixed in version 8.0.6.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:13suricatano fix listedDEBIAN-CVE-2026-63451
Debian:14suricata1:8.0.6-1DEBIAN-CVE-2026-63451
Ubuntu:22.04:LTSsuricatano fix listedUBUNTU-CVE-2026-63451
Ubuntu:24.04:LTSsuricatano fix listedUBUNTU-CVE-2026-63451
Ubuntu:26.04:LTSsuricatano fix listedUBUNTU-CVE-2026-63451

Affected products (as reported)

VendorProductVersions
OISF suricata >= 8.0.0, < 8.0.6

Weakness: CWE-122 · Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

References