CVE-2026-6535
Received Received - Intake
Dissection engine zlib decompression crash in Wireshark

Publication date: 2026-04-30

Last updated on: 2026-05-01

Assigner: GitLab Inc.

Description
Dissection engine zlib decompression crash in Wireshark 4.6.0 to 4.6.4 and 4.4.0 to 4.4.14 allows denial of service
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Meta Information
Published
2026-04-30
Last Modified
2026-05-01
Generated
2026-06-16
AI Q&A
2026-04-30
EPSS Evaluated
2026-06-15
NVD
CVE-2026-6535
EUVD
EUVD-2026-26342
Affected Vendors & Products
Showing 2 associated CPEs
Vendor Product Version / Range
wireshark wireshark From 4.4.0 (inc) to 4.4.14 (inc)
wireshark wireshark From 4.6.0 (inc) to 4.6.4 (inc)
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-1325 The product manages a group of objects or resources and performs a separate memory allocation for each object, but it does not properly limit the total amount of memory that is consumed by all of the combined objects.
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Executive Summary

This vulnerability is a crash in the zlib decompression component of Wireshark's dissection engine. Specifically, in affected versions of Wireshark (4.6.0 to 4.6.4 and 4.4.0 to 4.4.14), the zlib decompressor can crash when processing certain data, leading to a denial of service condition.

Impact Analysis

The primary impact of this vulnerability is a denial of service (DoS). An attacker could cause Wireshark to crash by sending specially crafted data that triggers the zlib decompression crash. This could disrupt network analysis or monitoring activities that rely on Wireshark.

Mitigation Strategies

To mitigate the dissection engine zlib decompression crash vulnerability in Wireshark, you should upgrade Wireshark to a fixed version.

  • Upgrade to Wireshark version 4.6.5 or later.
  • Alternatively, upgrade to Wireshark version 4.4.15 or later if you are using the 4.4.x series.
Compliance Impact

The provided information does not specify any direct impact of this vulnerability on compliance with common standards and regulations such as GDPR or HIPAA.

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