PT-2026-51473 · Red Hat · Red Hat Enterprise Linux 10+6

Published 2026-06-23 · Updated 2026-06-23 · CVE-2026-55655

Mitre

CVSS v3.1

5.0

Medium

Base vector

AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:L/A:N

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.

Fix

Weakness Enumeration

CWE-923

Related Identifiers

CVE-2026-55655

Affected Products

Red Hat Enterprise Linux 10

Red Hat Enterprise Linux 6

Red Hat Enterprise Linux 7

Red Hat Enterprise Linux 8

Red Hat Enterprise Linux 9

Red Hat Hardened Images

Red Hat Openshift Container Platform 4

References · 3

• https://nvd.nist.gov/vuln/detail/CVE-2026-55655 · Security Note
• https://access.redhat.com/security/cve/CVE-2026-55655 · Note
• https://bugzilla.redhat.com/show_bug.cgi?id=2462250 · Note