CVE-2021-28041

Description

ssh-agent in OpenSSH before 8.5 has a double free that may be relevant in a few less-common scenarios, such as unconstrained agent-socket access on a legacy operating system, or the forwarding of an agent to an attacker-controlled host.

Category

7.1
CVSS
Severity: High
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.25%
Vendor Advisory fedoraproject.org Vendor Advisory gentoo.org Vendor Advisory fedoraproject.org Vendor Advisory openssh.com Vendor Advisory openssh.com
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://www.openssh.com/security.html not applicable vendor advisory
https://www.openwall.com/lists/oss-security/2021/03/03/1 mailing list third party advisory patch
https://github.com/openssh/openssh-portable/commit/e04fd6dde16de1cdc5a4d9946397ff60d96568db third party advisory patch
https://www.openssh.com/txt/release-8.5 release notes vendor advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TXST2CML2MWY3PNVUXX7FFJE3ATJMNVZ/ vendor advisory
https://security.gentoo.org/glsa/202105-35 third party advisory vendor advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/KQWGII3LQR4AOTPPFXGMTYE7UDEWIUKI/ vendor advisory
https://www.oracle.com//security-alerts/cpujul2021.html third party advisory
https://security.netapp.com/advisory/ntap-20210416-0002/ third party advisory

Frequently Asked Questions

What is the severity of CVE-2021-28041?
CVE-2021-28041 has been scored as a high severity vulnerability.
How to fix CVE-2021-28041?
To fix CVE-2021-28041, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-28041 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2021-28041 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
This platform uses data from the NIST NVD, MITRE CVE, MITRE CWE, First.org and CISA KEV but is not endorsed or certified by these entities. CVE is a registred trademark of the MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. CWE is a registred trademark of the MITRE Corporation and the authoritative source of CWE content is MITRE's CWE web site.
© 2025 Under My Watch. All Rights Reserved.