CVE-2026-96421Public exploitHinoki check available

Packet-analysis hang via USB HID loop wraparound

Published Sep 29, 2026 · Updated Sep 29, 2026

Denial of service in the USB HID dissector of Wireshark 4.4.0 through 4.4.18 and 4.6.0 through 4.6.8 allows attackers to hang packet analysis. In parse_report_descriptor(), an extended Usage Maximum of 0xFFFFFFFF makes a 32-bit inclusive loop counter wrap to zero while it continues appending entries to a memory array. Processing a crafted USB capture in the default configuration can leave Wireshark or TShark spinning and consuming memory until the process is terminated.

CVSS severityUnavailable
Unscored
EPSS probability0.13%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Denial of service in the USB HID dissector of Wireshark 4.4.0 through 4.4.18 and 4.6.0 through 4.6.8 allows attackers to hang packet analysis. In parse_report_descriptor(), an extended Usage Maximum of 0xFFFFFFFF makes a 32-bit inclusive loop counter wrap to zero while it continues appending entries to a memory array. Processing a crafted USB capture in the default configuration can leave Wireshark or TShark spinning and consuming memory until the process is terminated.

The record

CVE
CVE-2026-96421
Published
Sep 29, 2026
Updated
Sep 29, 2026
Vendor
Wireshark Foundation
Product
Wireshark
Classifications
CWE-1325, T1499.004
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 29, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 29, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=4.4.0 <4.4.19
  2. Affected versionversion=4.6.0 <4.6.9

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Wireshark Foundation · Wiresharkversion=4.4.0 <4.4.19; version=4.6.0 <4.6.9

Published CVSS scores

No CVSS assessment is available in this record.

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Activity data is delayed. The latest report is Sep 28, 2026.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-1325Improperly Controlled Sequential Memory Allocation
T1499.004Endpoint Denial of Service: Application or System Exploitation

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

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