CVE-2026-55655
Openssh: local mitm of x11 forwarding via abstract unix socket pre-binding in red hat enterprise linux openssh client versions
Description
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.
No summary for this CVE yet.
CVSS Vector Breakdown
Exploitability
AV:LAttack VectorLocal
AC:HAttack ComplexityHigh
PR:LPrivileges RequiredLow
UI:RUser InteractionRequired
Scope
S:UScopeUnchanged
Impact
C:HConfidentialityHigh
I:LIntegrityLow
A:NAvailabilityNone
Weaknesses
Affected Products
Red Hat
commercial·USaka redhat
openbsd
oss-project·CA
and 5 more affected products View all →
Exploitability
Official Patch Available
Workaround Available
References
https://access.redhat.com/errata/RHSA-2026:36759
access.redhat.com
https://access.redhat.com/errata/RHSA-2026:47755
access.redhat.com
https://access.redhat.com/errata/RHSA-2026:47756
access.redhat.com
and 5 more references View all →
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