CVE-2026-5408: Uncontrolled Recursion in Wireshark

Q: What is the severity of CVE-2026-5408?

CVE-2026-5408 is classified as a denial of service vulnerability due to uncontrolled recursion in the BT-DHT protocol dissector in specific versions of Wireshark.

Q: How do I fix CVE-2026-5408?

To fix CVE-2026-5408, update Wireshark to version 4.6.5 or higher, or 4.4.15 or higher.

Q: What are the affected versions in CVE-2026-5408?

The affected versions for CVE-2026-5408 are Wireshark 4.6.0 to 4.6.4 and 4.4.0 to 4.4.14.

Q: What is the impact of CVE-2026-5408?

The impact of CVE-2026-5408 is that it can lead to a denial of service, causing the application to crash.

Q: Is CVE-2026-5408 exploitable remotely?

Yes, CVE-2026-5408 can be exploited remotely if a user analyzes a malicious packet using vulnerable versions of Wireshark.

Published Apr 30, 2026

Updated

BT-DHT protocol dissector crash in Wireshark 4.6.0 to 4.6.4 and 4.4.0 to 4.4.14 allows denial of service

Affected Software

3 affected components

Wireshark Wireshark>=4.6.0<=4.6.4, >=4.4.0<=4.4.14

Wireshark Wireshark>=4.4.0<=4.4.14

Wireshark Wireshark>=4.6.0<=4.6.4

Remediation

Recommended actions to resolve this vulnerability, in priority order.

Upgrade
Upgrade Wireshark to a version that resolves this vulnerability.
Fixed in 4.6.5

Event History

Apr 30, 2026

CVE Published

via MITRE·05:40 AM

Data Sourced

via MITRE·05:40 AM

RemedyDescriptionSeverityWeakness

Data Sourced

via NVD·07:16 AM

DescriptionSeverityWeaknessAffected Software

Frequently Asked Questions

What is the severity of CVE-2026-5408?

CVE-2026-5408 is classified as a denial of service vulnerability due to uncontrolled recursion in the BT-DHT protocol dissector in specific versions of Wireshark.

How do I fix CVE-2026-5408?