CVE-2026-96418Public exploitHinoki check available

Packet-analysis hang via cyclic TIFF directory

Published Sep 29, 2026 · Updated Sep 29, 2026

An infinite loop in Wireshark 4.4.0 through 4.4.18 and 4.6.0 through 4.6.8 lets attackers hang packet analysis with crafted TIFF data. The TIFF dissector repeatedly follows an untrusted next-directory offset without detecting that it points back to a directory already parsed. The hang requires Wireshark or TShark to process the crafted TIFF, either as a file or within captured traffic, and consumes CPU without reported data disclosure or code execution.

CVSS severity5.5
Medium
EPSS probability0.14%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Get started

Summary

What happened

An infinite loop in Wireshark 4.4.0 through 4.4.18 and 4.6.0 through 4.6.8 lets attackers hang packet analysis with crafted TIFF data. The TIFF dissector repeatedly follows an untrusted next-directory offset without detecting that it points back to a directory already parsed. The hang requires Wireshark or TShark to process the crafted TIFF, either as a file or within captured traffic, and consumes CPU without reported data disclosure or code execution.

The record

CVE
CVE-2026-96418
Published
Sep 29, 2026
Updated
Sep 29, 2026
Vendor
Wireshark Foundation
Product
Wireshark
Classifications
CWE-835, 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

Compare your product and version with the public record. A matching version still requires validation against your environment.

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

5.5GitLab CNACVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

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-835Loop with Unreachable Exit Condition ('Infinite Loop')
T1499.004Application or System Exploitation

Public exploit references

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

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Get started to see how Hinoki identifies affected software and validates exploitability in your environment.

Get started