CVE-2026-55655
EUVD-2026-3841323.06.2026, 04:17
A flaw was found in OpenSSH. A local unprivileged attacker on a Linux client host can hijack client-side X11 forwarding connections. This is possible by pre-binding the preferred abstract X socket name when X11 forwarding is enabled and a local UNIX-domain X socket is used. A successful attack can compromise the confidentiality of forwarded X11 traffic, including sensitive window contents and input, and may allow some manipulation of the forwarded session.Enginsight
Affected Products (NVD)
| Vendor | Product | Version |
|---|---|---|
| openbsd | openssh | - |
| redhat | enterprise_linux | 6.0 |
| redhat | enterprise_linux | 7.0 |
| redhat | enterprise_linux | 8.0 |
| redhat | enterprise_linux | 9.0 |
| redhat | enterprise_linux | 10.0 |
𝑥
= Vulnerable software versions
Debian Releases
Ubuntu Releases
Red Hat Enterprise Linux Releases
Red Hat Product | |||||
|---|---|---|---|---|---|
| openssh |
| ||||
| openssh-askpass |
| ||||
| openssh-cavs |
| ||||
| openssh-clients |
| ||||
| openssh-keycat |
| ||||
| openssh-ldap |
| ||||
| openssh-server |
| ||||
| pam |
|
Amazon Linux Releases
Amazon Package | |||
|---|---|---|---|
| openssh |
| ||
| openssh-clients |
| ||
| openssh-clients-debuginfo |
| ||
| openssh-debuginfo |
| ||
| openssh-debugsource |
| ||
| openssh-keycat |
| ||
| openssh-keycat-debuginfo |
| ||
| openssh-server |
| ||
| openssh-server-debuginfo |
| ||
| openssh-sk-dummy |
| ||
| openssh-sk-dummy-debuginfo |
| ||
| pam_ssh_agent_auth |
| ||
| pam_ssh_agent_auth-debuginfo |
|
References