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)
5.0CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:L/A:N
Affected Products
| Vendor | Product | Version | Status |
|---|---|---|---|
| Red Hat | Red Hat Enterprise Linux 10 | 0:9.9p1-25.el10_2 | unaffected |
| Red Hat | Red Hat Enterprise Linux 10 | 0:8.0p1-30.el8_10 | — |
| Red Hat | Red Hat Enterprise Linux 10 | 0:9.9p1-9.el9_8 | — |
| Red Hat | Red Hat Enterprise Linux 10 | 10.3p1-6.hum1 | — |
| Red Hat | Red Hat Enterprise Linux 8 | 0:9.9p1-25.el10_2 | unaffected |
| Red Hat | Red Hat Enterprise Linux 8 | 0:8.0p1-30.el8_10 | — |
| Red Hat | Red Hat Enterprise Linux 8 | 0:9.9p1-9.el9_8 | — |
| Red Hat | Red Hat Enterprise Linux 8 | 10.3p1-6.hum1 | — |
| Red Hat | Red Hat Enterprise Linux 9 | 0:9.9p1-25.el10_2 | unaffected |
| Red Hat | Red Hat Enterprise Linux 9 | 0:8.0p1-30.el8_10 | — |
| Red Hat | Red Hat Enterprise Linux 9 | 0:9.9p1-9.el9_8 | — |
| Red Hat | Red Hat Enterprise Linux 9 | 10.3p1-6.hum1 | — |
| Red Hat | Red Hat Hardened Images | 0:9.9p1-25.el10_2 | unaffected |
| Red Hat | Red Hat Hardened Images | 0:8.0p1-30.el8_10 | — |
| Red Hat | Red Hat Hardened Images | 0:9.9p1-9.el9_8 | — |
| Red Hat | Red Hat Hardened Images | 10.3p1-6.hum1 | — |
| Red Hat | Red Hat Enterprise Linux 6 | 0:9.9p1-25.el10_2 | unaffected |
| Red Hat | Red Hat Enterprise Linux 6 | 0:8.0p1-30.el8_10 | — |
| Red Hat | Red Hat Enterprise Linux 6 | 0:9.9p1-9.el9_8 | — |
| Red Hat | Red Hat Enterprise Linux 6 | 10.3p1-6.hum1 | — |
| Red Hat | Red Hat Enterprise Linux 7 | 0:9.9p1-25.el10_2 | unaffected |
| Red Hat | Red Hat Enterprise Linux 7 | 0:8.0p1-30.el8_10 | — |
| Red Hat | Red Hat Enterprise Linux 7 | 0:9.9p1-9.el9_8 | — |
| Red Hat | Red Hat Enterprise Linux 7 | 10.3p1-6.hum1 | — |
| Red Hat | Red Hat OpenShift Container Platform 4 | 0:9.9p1-25.el10_2 | unaffected |
| Red Hat | Red Hat OpenShift Container Platform 4 | 0:8.0p1-30.el8_10 | — |
| Red Hat | Red Hat OpenShift Container Platform 4 | 0:9.9p1-9.el9_8 | — |
| Red Hat | Red Hat OpenShift Container Platform 4 | 10.3p1-6.hum1 | — |