CVE-2026-55655

Discovered by AISLEPUBLISHEDCWE-923

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.

CVSS Base Scores

CVSS v3.1(Primary)
5.0

CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:L/A:N

Affected Products

VendorProductVersionStatus
Red HatRed Hat Enterprise Linux 100:9.9p1-25.el10_2unaffected
Red HatRed Hat Enterprise Linux 80:8.0p1-30.el8_10unaffected
Red HatRed Hat Enterprise Linux 90:9.9p1-9.el9_8unaffected
Red HatRed Hat Hardened Images10.3p1-6.hum1unaffected
Red HatRed Hat Update Infrastructure 51786435483unaffected
Red HatRed Hat Update Infrastructure 51786533529unaffected
Red HatRed Hat Update Infrastructure 51787135742unaffected
Red HatRed Hat Update Infrastructure 51787241260unaffected
Red HatRed Hat Enterprise Linux 6——
Red HatRed Hat Enterprise Linux 7——
Red HatRed Hat OpenShift Container Platform 4——

Credits

  • This issue was discovered by In partnership with Red Hat (Aisle.com).

References