Vulnerability · Published Sep 16, 2026 · Assigned by GitHub_M

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

High 7.5

In plain English

A high-severity security flaw 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 0.5% (higher than 41% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.5High

Exploit odds (30 days)0.5%top 59.1% 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. 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.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Debian:13	suricata	no fix listed	DEBIAN-CVE-2026-46352
Debian:14	suricata	1:8.0.5-1	DEBIAN-CVE-2026-46352
Ubuntu:22.04:LTS	suricata	no fix listed	UBUNTU-CVE-2026-46352
Ubuntu:24.04:LTS	suricata	no fix listed	UBUNTU-CVE-2026-46352
Ubuntu:26.04:LTS	suricata	no fix listed	UBUNTU-CVE-2026-46352

Affected products (as reported)

Vendor	Product	Versions
OISF	suricata	>= 8.0.0, < 8.0.5

Weakness: CWE-833 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References

https://github.com/OISF/suricata/security/advisories/GHSA-rc34-46x6-mxxm x_refsource_CONFIRM
https://forum.suricata.io/t/suricata-8-0-5-and-7-0-16-released/6315 x_refsource_MISC
https://redmine.openinfosecfoundation.org/issues/8550 x_refsource_MISC