Is CVE-2026-46352 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-46352 being exploited in the wild.

How severe is CVE-2026-46352?

High severity, with a CVSS score of 7.5, published 16 September 2026.

Which products and versions are affected?

Open Information Security Foundation Suricata 8.0.0 to 8.0.4.

Is there a fix for CVE-2026-46352?

A patch was published on 2026-05-19: Suricata 8.0.5 released with fix Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-46352 attacked?

It is attacked over the network.

Am I affected by CVE-2026-46352?

Check whether anything you run is named in the advisory. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-46352: Suricata IP defragmentation deadlock with encapsulated tunnel traffic

CVE-2026-46352 · Severity: high · CVSS 7.5 · Published 2026-09-16

Suricata is a network intrusion detection and prevention system used to monitor and protect network traffic. The vulnerability causes Suricata to deadlock when processing certain malformed network packets containing fragmented tunnel traffic, resulting in the security system hanging and losing visibility of network activity. An attacker can exploit this by sending specially crafted packets to disable network monitoring capabilities.

Quick answers

Is CVE-2026-46352 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-46352 being exploited in the wild.
How severe is CVE-2026-46352?: High severity, with a CVSS score of 7.5, published 16 September 2026.
Which products and versions are affected?: Open Information Security Foundation Suricata 8.0.0 to 8.0.4.
Is there a fix for CVE-2026-46352?: A patch was published on 2026-05-19: Suricata 8.0.5 released with fix Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-46352 attacked?: It is attacked over the network.
Am I affected by CVE-2026-46352?: Check whether anything you run is named in the advisory. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

This is a deadlock vulnerability (CWE-833) in Suricata's IP defragmentation code. The vulnerability occurs when processing fragmented network packets containing an encapsulated tunnel protocol whose payload is itself fragmented. The flaw is triggered by specially crafted network traffic (no authentication or privileges required), causing multiple threads to wait indefinitely for locks, resulting in service unavailability and loss of network visibility. Affected versions are 8.0.0 through 8.0.4; version 8.0.5 contains the fix. No known workarounds are available.

Affected products

Open Information Security Foundation Suricata 8.0.0 to 8.0.4

Timeline

2026-06-02: disclosed
2026-05-19: patched: Suricata 8.0.5 released with fix
2026-09-16: advisory: CVE-2026-46352 published

References

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