CVE Database›Document archive›CVE-2021-28041

CVE-2021-28041

openssh: double-free memory corruption may lead to arbitrary code execution

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Severity

Moderate

Red Hat Product Security

7.1

CVSS 3.1

Review impact separately from score.

Published · March 3, 2021

Updated · October 14, 2026

Description

A double-free memory corruption flaw was found in OpenSSH 8.2, more specifically in ssh-agent application. This flaw allows an attacker with access to the agent socket to forward an agent either to an account shared with a malicious user or to a host with an attacker holding root access. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability.

Statement

This issue doesn't affected any versions of OpenSSH packaged and shipped with Red Hat Enterprise Linux 6, 7 and 8. The issue was introduced in OpenSSH 8.2 while the most recent OpenSSH version available for Red Hat Enterprise Linux 8 is based on OpenSSH 8.0.

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

No mitigation is specified in collected source.

CVSS / CWE

CVSS 3.1 · 7.1
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H

CWE-416 · Use After Free