CVE-2021-28041

medium
Published — · Modified —
CVSS v3
CVSS v2
VIR risk
5.5

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.

Predictions

Exploit likelihood
20%
Patch ETA

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

vendor Authored 2026-05-27

Vendor advisory: debian — https://security-tracker.debian.org/tracker/CVE-2021-28041

vendor Authored 2026-05-27

Vendor advisory: suse — https://www.suse.com/security/cve/CVE-2021-28041.html

vendor Authored 2026-05-27

Vendor advisory: arch — https://security.archlinux.org/ASA-202103-6

OS impact

OSVersionStatusFixed in
arch archfixed8.5p1-1
suse slesaffected
debian debianbookwormfixed1:8.4p1-5
debian debianbullseyefixed1:8.4p1-5
debian debianforkyfixed1:8.4p1-5
debian debiansidfixed1:8.4p1-5
debian debiantrixiefixed1:8.4p1-5

References

Verify integrity in audit chain (admin only). AS-IS.