CVE-2026-63451Hinoki check available

Local service crash via crafted detection rule

Published Sep 18, 2026 · Updated Sep 18, 2026

Heap buffer overflow in Suricata 8.0.0 through 8.0.5 allows local users to crash the service by loading a crafted detection rule. During non-prefilter signature preparation, src/detect-engine-prefilter.c selects multiple non-prefilter frame engines for a frame rule combining content-free inspection with a content-free transformed match. The user must be able to supply a local ruleset; network traffic alone cannot reach the flaw, and the reported consequence is a process crash.

CVSS severity3.3
Low
EPSS probability0.15%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Heap buffer overflow in Suricata 8.0.0 through 8.0.5 allows local users to crash the service by loading a crafted detection rule. During non-prefilter signature preparation, src/detect-engine-prefilter.c selects multiple non-prefilter frame engines for a frame rule combining content-free inspection with a content-free transformed match. The user must be able to supply a local ruleset; network traffic alone cannot reach the flaw, and the reported consequence is a process crash.

The record

CVE
CVE-2026-63451
Published
Sep 18, 2026
Updated
Sep 18, 2026
Vendor
Open Information Security Foundation
Product
Suricata
Classifications
CWE-122, T1489
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 18, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 18, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=>= 8.0.0, < 8.0.6

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Open Information Security Foundation · Suricataversion=>= 8.0.0, < 8.0.6

Published CVSS scores

3.3GitHub Security AdvisoryCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

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.

Activity data is delayed. The latest report is Sep 28, 2026.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-122Heap-based Buffer Overflow
T1489Service Stop

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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