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

Quick assessment

Affected

OISF suricata

Exploitation

No confirmed in-the-wild exploitation; assess based on exposure

Recommended action

Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Suricata 是一个网络入侵检测系统（IDS）、入侵防御系统（IPS）以及网络安全监控引擎。在 8.0.0 到 8.0.6 版本中，如果本地提供的检测规则将“无内容的帧检查”与“无内容的转换匹配”组合使用，可能导致在为非预过滤检查准备签名时，选择多个非预过滤帧引擎。加载经过构造的规则（包括在测试模式下）可能触发堆缓冲区溢出并导致 Suricata 崩溃；仅通过网络流量无法触发该漏洞。该问题已在 8.0.6 版本中修复。

CVSS 3.3 · Low EPSS 0.15% · P4 Updated Sep 23, 2026

Possible ATT&CK Techniques 1 AI

T1562.008

Affected Version Matrix 1

Vendor	Product	Version Range	Status
OISF	suricata	`>= 8.0.0, < 8.0.6`	affected

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Vulnerability Information

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Vulnerability Title

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

Source: CVE Program / CVE List V5

Vulnerability 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.

Source: CVE Program / CVE List V5

CVSS Information

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

Source: CVE Program / CVE List V5

Vulnerability Type

堆缓冲区溢出

Source: CVE Program / CVE List V5

Affected Products

Vendor	Product	Affected Versions	CPE	Subscribe
OISF	suricata	>= 8.0.0, < 8.0.6	-

II. Public POCs for CVE-2026-63451

#	POC Description	Source Link	Shenlong Link

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III. Intelligence Information for CVE-2026-63451

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Patches & Fixes for CVE-2026-63451 (3)

🔗 next/1423/20260706/v1 by victorjulien · Pull Request #15807 · OISF/suricata Read full article x_refsource_MISC
🔗 detect: use only one non-prefilter frame for prefilter · OISF/suricata@5449ae1 · GitHub Read full article x_refsource_MISC
🔗 detect: use only one non-prefilter frame for prefilter · OISF/suricata@d62acf5 · GitHub x_refsource_MISC

Other References for CVE-2026-63451 (3)

🔗 Open Information Security Foundation x_refsource_MISC
🔗 Release 8.0.6 · OISF/suricata · GitHub x_refsource_MISC
🔗 detect: frame rules without content and with transform can cause heap buffer overflow during rule load · Advisory · OISF/suricata · GitHub x_refsource_CONFIRM

https://www.cve.org/CVERecord?id=CVE-2026-63451

Same Patch Batch · OISF · 2026-09-18 · 17 CVEs total

CVE-2026-57228	8.2 HIGH	Suricata smtp/mime: heap out-of-bounds read quoted-printable decoder
CVE-2026-63446	7.5 HIGH	Suricata app-layer: passed flows can retain transactions, causing resource exhaustion
CVE-2026-63447	7.5 HIGH	Suricata ftp: crafted FTP traffic can cause quadratic CPU consumption
CVE-2026-63452	7.5 HIGH	Suricata http1: repeated brotli compression bombs can cause excessive CPU consumption
CVE-2026-57227	7.5 HIGH	Suricata mqtt: unbounded resource consumption from repeated pubrec and pubrel messages
CVE-2026-71418	7.5 HIGH	Suricata doh2: crafted HTTP/2 DATA frames can cause quadratic CPU consumption
CVE-2026-57223	7.0 HIGH	Suricata windows: unquoted LocalSystem service ImagePath can allow local privilege escalat
CVE-2026-57224	6.5 MEDIUM	Suricata dhcp: unbounded transactions in unidirectional traffic can lead to resource exhau
CVE-2026-63448	5.9 MEDIUM	Suricata smb: some SMB flows can cause resource exhaustion
CVE-2026-71855	5.9 MEDIUM	Suricata flow: IPv4/IPv6 hash collision can reuse wrong flow state
CVE-2026-57229	5.3 MEDIUM	Suricata smtp/mime: incomplete state reset allows detection bypass
CVE-2026-57222	5.3 MEDIUM	Suricata ippair: hash collision can cause incorrect state reuse across IPv4 and IPv6
CVE-2026-63450	3.7 LOW	Suricata ftp: RETR/STOR before PORT/PASV can disable further IDS app-layer detection
CVE-2026-63449	3.7 LOW	Suricata sip: large SIP message bodies can evade detection with frame keyword
CVE-2026-57226	3.7 LOW	Suricata swf: heap buffer overflow in SWF decompression depth handling
CVE-2026-57225	3.3 LOW	Suricata datasets: NULL pointer dereference in JSON/NDJSON dataset loading

IV. Related Vulnerabilities

Same product: suricata

Same vendor: OISF

Same weakness: CWE-122