CVE Database›Document archive›CVE-2026-6533

CVE-2026-6533

Wireshark: Wireshark: Denial of service via LZ77 decompression crash

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Severity

Moderate

Red Hat Product Security

6.5

CVSS 3.1

Review impact separately from score.

Published · April 30, 2026

Updated · July 3, 2026

Description

A flaw was found in Wireshark. A remote attacker could exploit a dissection engine LZ77 decompression crash by crafting a malicious packet. This vulnerability leads to a Denial of Service (DoS) condition, making the application unavailable.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

To mitigate this issue, users should avoid opening untrusted or suspicious packet capture files with Wireshark. Running Wireshark in a sandboxed environment can further limit the potential impact of processing malicious data.

CVSS / CWE

CVSS 3.1 · 6.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

CWE-409 · Improper Handling of Highly Compressed Data (Data Amplification)