vulnerability
Red Hat: CVE-2025-61984: openssh: OpenSSH: Control characters in usernames can lead to code execution via ProxyCommand (Multiple Advisories)
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 4 | (AV:L/AC:L/Au:S/C:P/I:P/A:P) | Oct 6, 2025 | Dec 18, 2025 | Feb 3, 2026 |
Severity
4
CVSS
(AV:L/AC:L/Au:S/C:P/I:P/A:P)
Published
Oct 6, 2025
Added
Dec 18, 2025
Modified
Feb 3, 2026
Description
ssh in OpenSSH before 10.1 allows control characters in usernames that originate from certain possibly untrusted sources, potentially leading to code execution when a ProxyCommand is used. The untrusted sources are the command line and %-sequence expansion of a configuration file. (A configuration file that provides a complete literal username is not categorized as an untrusted source.)
Solutions
redhat-upgrade-opensshredhat-upgrade-openssh-askpassredhat-upgrade-openssh-askpass-debuginforedhat-upgrade-openssh-cavsredhat-upgrade-openssh-cavs-debuginforedhat-upgrade-openssh-clientsredhat-upgrade-openssh-clients-debuginforedhat-upgrade-openssh-debuginforedhat-upgrade-openssh-debugsourceredhat-upgrade-openssh-keycatredhat-upgrade-openssh-keycat-debuginforedhat-upgrade-openssh-keysignredhat-upgrade-openssh-keysign-debuginforedhat-upgrade-openssh-ldapredhat-upgrade-openssh-ldap-debuginforedhat-upgrade-openssh-serverredhat-upgrade-openssh-server-debuginforedhat-upgrade-openssh-sk-dummy-debuginforedhat-upgrade-pam_ssh_agent_authredhat-upgrade-pam_ssh_agent_auth-debuginfo
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