CVE-2026-76918

Analyzed Analyzed - Analysis Complete

SSH Protocol Dissector Crash in Wireshark

Publication date: 2026-08-19

Last updated on: 2026-08-31

Assigner: GitLab Inc.

Description

SSH protocol dissector crash in 4.6.0 to 4.6.7 and 4.4.0 to 4.4.18 allows denial of service

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published

2026-08-19

Last Modified

2026-08-31

Generated

2026-09-09

AI Q&A

2026-08-20

EPSS Evaluated

2026-09-07

NVD

CVE-2026-76918

EUVD

EUVD-2026-63174

Affected Vendors & Products

Vendor	Product	Version / Range
wireshark	wireshark	From 4.6.0 (inc) to 4.6.8 (exc)
wireshark	wireshark	From 4.4.0 (inc) to 4.4.18 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-122	A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc().

Attack-Flow Graph

Executive Summary

This vulnerability is a denial of service issue in SSH protocol dissectors affecting versions 4.6.0 to 4.6.7 and 4.4.0 to 4.4.18. It causes a crash in the SSH protocol dissector, leading to service disruption.

Detection Guidance

This vulnerability is related to an SSH protocol dissector crash in specific Wireshark versions. Detection involves checking Wireshark versions and monitoring for crashes during SSH traffic analysis. Use 'wireshark --version' to check installed versions. Monitor system logs for Wireshark crashes during SSH traffic capture.

Impact Analysis

The vulnerability allows attackers to cause a denial of service by crashing the SSH protocol dissector. This can disrupt SSH services, leading to loss of access or connectivity for users relying on SSH for remote access or secure communications.

Compliance Impact

This vulnerability causes a denial of service via an SSH protocol dissector crash. It does not directly affect compliance with GDPR, HIPAA, or similar standards as it is a technical flaw rather than a data protection or privacy issue.

Mitigation Strategies

Update SSH protocol dissector to versions outside the vulnerable range (4.6.0 to 4.6.7 and 4.4.0 to 4.4.18). Disable SSH protocol dissector if not required to prevent denial of service attacks.

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