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CVE-2026-46352— Suricata defrag: fragmented encapsulated traffic with fragments can lead to deadlock

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 是一种网络入侵检测系统（IDS）、入侵防御系统（IPS）和网络安全监控引擎。从 8.0.0 版本开始，到 8.0.5 版本之前，Suricata 的 IP 分片重组代码在处理包含封装隧道协议的分片流量时，如果该隧道协议的载荷本身也是分片的，可能会导致死锁。该问题已在 8.0.5 版本中修复。目前无已知的替代解决方案。

CVSS 7.5 · High EPSS 0.47% · P38

Possible ATT&CK Techniques 1 AI

T1572 · Protocol Tunneling

Affected Version Matrix 1

VendorProduct Version RangeStatus
OISF suricata >= 8.0.0, < 8.0.5 affected
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I. Basic Information for CVE-2026-46352

Vulnerability Information
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Vulnerability Title
Suricata defrag: fragmented encapsulated traffic with fragments can lead to deadlock
Source: CVE Program / CVE List V5
Vulnerability Description
Suricata is a network Intrusion Detection System, Intrusion Prevention System and Network Security Monitoring engine. Starting in version 8.0.0 and prior to version 8.0.5, Suricata's IP defragmentation code could deadlock when processing fragmented traffic containing an encapsulated tunnel protocol whose payload is itself fragmented. Version 8.0.5 contains a fix. No known workarounds are available.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
死锁
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
OISF suricata >= 8.0.0, < 8.0.5 -

II. Public POCs for CVE-2026-46352

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III. Intelligence Information for CVE-2026-46352

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Vendor Pages for CVE-2026-46352 (1)

Other References for CVE-2026-46352 (2)

IV. Related Vulnerabilities

Same product: suricata
Same vendor: OISF
Same weakness: CWE-833

V. Comments for CVE-2026-46352

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