CVE-2026-60002

Analyzed Analyzed - Analysis Complete

Use-After-Free in OpenSSH Client

Publication date: 2026-07-08

Last updated on: 2026-07-09

Assigner: MITRE

Description

ssh in OpenSSH before 10.4 can have a use-after-free when a server changes its host key during a key re-exchange. (This outcome occurs only on the client side.)

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published

2026-07-08

Last Modified

2026-07-09

Generated

2026-07-11

AI Q&A

2026-07-08

EPSS Evaluated

2026-07-09

NVD

CVE-2026-60002

EUVD

EUVD-2026-42146

Affected Vendors & Products

Vendor	Product	Version / Range
openbsd	openssh	to 10.4 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-416	The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

Attack-Flow Graph

Mitigation Strategies

To mitigate the use-after-free vulnerability in OpenSSH before version 10.4, you should immediately upgrade your OpenSSH installation to version 10.4 or later, which includes fixes for this and other security issues.

The update addresses memory management issues related to host key handling during key re-exchange, preventing the vulnerability from being exploited on the client side.

Executive Summary

This vulnerability exists in OpenSSH versions before 10.4 and involves a use-after-free issue that occurs on the client side. Specifically, it happens when a server changes its host key during a key re-exchange process.

Impact Analysis

The vulnerability can lead to serious security impacts because it has a high base CVSS score of 7.7, indicating it is a high severity issue. It can compromise confidentiality and integrity, and cause a low level of availability impact on the client side when connecting to a server that changes its host key during key re-exchange.

Compliance Impact

The provided information does not specify how the use-after-free vulnerability in OpenSSH before 10.4 affects compliance with common standards and regulations such as GDPR or HIPAA.

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