CVE-2026-55655 (GCVE-0-2026-55655)
Vulnerability from cvelistv5 – Published: 2026-06-23 03:36 – Updated: 2026-10-30 07:43
VLAI
EPSS
VEX
Title
Openssh: local mitm of x11 forwarding via abstract unix socket pre-binding in red hat enterprise linux openssh client versions
Summary
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.
Severity
5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-23 12:21 UTC
CWE
- CWE-923 - Improper Restriction of Communication Channel to Intended Endpoints
Assigner
References
50 references
Impacted products
52 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Red Hat | Red Hat Enterprise Linux 10 |
Unaffected:
0:9.9p1-25.el10_2 , < *
(rpm)
cpe:/o:redhat:enterprise_linux:10.2 |
||
| Red Hat | Red Hat Enterprise Linux 10.0 Extended Update Support |
Unaffected:
0:9.9p1-7.el10_0.5 , < *
(rpm)
cpe:/o:redhat:enterprise_linux_eus:10.0 |
||
| Red Hat | Red Hat Enterprise Linux 8 |
Unaffected:
0:8.0p1-30.el8_10 , < *
(rpm)
cpe:/a:redhat:enterprise_linux:8::appstream cpe:/o:redhat:enterprise_linux:8::baseos |
||
| Red Hat | Red Hat Enterprise Linux 9 |
Unaffected:
0:9.9p1-9.el9_8 , < *
(rpm)
cpe:/a:redhat:enterprise_linux:9::appstream cpe:/o:redhat:enterprise_linux:9::baseos |
||
| Red Hat | Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions |
Unaffected:
0:8.7p1-30.el9_2.13 , < *
(rpm)
cpe:/a:redhat:rhel_e4s:9.2::appstream cpe:/o:redhat:rhel_e4s:9.2::baseos |
||
| Red Hat | Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions |
Unaffected:
0:8.7p1-38.el9_4.10 , < *
(rpm)
cpe:/a:redhat:rhel_e4s:9.4::appstream cpe:/o:redhat:rhel_e4s:9.4::baseos |
||
| Red Hat | Red Hat Enterprise Linux 9.6 Extended Update Support |
Unaffected:
0:8.7p1-45.el9_6.5 , < *
(rpm)
cpe:/a:redhat:rhel_eus:9.6::appstream cpe:/o:redhat:rhel_eus:9.6::baseos |
||
| Red Hat | Red Hat Hardened Images |
Unaffected:
10.3p1-6.hum1 , < *
(rpm)
cpe:/a:redhat:hummingbird:1 |
||
| Red Hat | Red Hat OpenShift AI 3.0 |
Unaffected:
1791818590 , < *
(rpm)
cpe:/a:redhat:openshift_ai:3.0::el9 |
||
| Red Hat | Red Hat OpenShift AI 3.0 |
Unaffected:
1791818589 , < *
(rpm)
cpe:/a:redhat:openshift_ai:3.0::el9 |
||
| Red Hat | Red Hat OpenShift AI 3.0 |
Unaffected:
1791818505 , < *
(rpm)
cpe:/a:redhat:openshift_ai:3.0::el9 |
||
| Red Hat | Red Hat OpenShift AI 3.0 |
Unaffected:
1791818496 , < *
(rpm)
cpe:/a:redhat:openshift_ai:3.0::el9 |
||
| Red Hat | Red Hat OpenShift AI 3.0 |
Unaffected:
1791818502 , < *
(rpm)
cpe:/a:redhat:openshift_ai:3.0::el9 |
||
| Red Hat | Red Hat OpenShift AI 3.0 |
Unaffected:
1793042072 , < *
(rpm)
cpe:/a:redhat:openshift_ai:3.0::el9 |
||
| Red Hat | Red Hat OpenShift AI 3.2 |
Unaffected:
1791818602 , < *
(rpm)
cpe:/a:redhat:openshift_ai:3.2::el9 |
||
| Red Hat | Red Hat OpenShift AI 3.2 |
Unaffected:
1791818598 , < *
(rpm)
cpe:/a:redhat:openshift_ai:3.2::el9 |
||
| Red Hat | Red Hat OpenShift AI 3.2 |
Unaffected:
1791818512 , < *
(rpm)
cpe:/a:redhat:openshift_ai:3.2::el9 |
||
| Red Hat | Red Hat OpenShift AI 3.2 |
Unaffected:
1791818587 , < *
(rpm)
cpe:/a:redhat:openshift_ai:3.2::el9 |
||
| Red Hat | Red Hat OpenShift AI 3.2 |
Unaffected:
1791818778 , < *
(rpm)
cpe:/a:redhat:openshift_ai:3.2::el9 |
||
| Red Hat | Red Hat OpenShift AI 3.3 |
Unaffected:
1791818782 , < *
(rpm)
cpe:/a:redhat:openshift_ai:3.3::el9 |
||
| Red Hat | Red Hat OpenShift AI 3.3 |
Unaffected:
1791818627 , < *
(rpm)
cpe:/a:redhat:openshift_ai:3.3::el9 |
||
| Red Hat | Red Hat OpenShift AI 3.3 |
Unaffected:
1791818790 , < *
(rpm)
cpe:/a:redhat:openshift_ai:3.3::el9 |
||
| Red Hat | Red Hat OpenShift AI 3.3 |
Unaffected:
1791818874 , < *
(rpm)
cpe:/a:redhat:openshift_ai:3.3::el9 |
||
| Red Hat | Red Hat OpenShift AI 3.3 |
Unaffected:
1791818792 , < *
(rpm)
cpe:/a:redhat:openshift_ai:3.3::el9 |
||
| Red Hat | Red Hat OpenShift AI 3.3 |
Unaffected:
1791818662 , < *
(rpm)
cpe:/a:redhat:openshift_ai:3.3::el9 |
||
| Red Hat | Red Hat OpenShift AI 3.3 |
Unaffected:
1791818877 , < *
(rpm)
cpe:/a:redhat:openshift_ai:3.3::el9 |
||
| Red Hat | Red Hat OpenShift AI 3.4 |
Unaffected:
1791883722 , < *
(rpm)
cpe:/a:redhat:openshift_ai:3.4::el9 |
||
| Red Hat | Red Hat OpenShift AI 3.4 |
Unaffected:
1791881612 , < *
(rpm)
cpe:/a:redhat:openshift_ai:3.4::el9 |
||
| Red Hat | Red Hat OpenShift AI 3.4 |
Unaffected:
1791885618 , < *
(rpm)
cpe:/a:redhat:openshift_ai:3.4::el9 |
||
| Red Hat | Red Hat OpenShift AI 3.4 |
Unaffected:
1791881487 , < *
(rpm)
cpe:/a:redhat:openshift_ai:3.4::el9 |
||
| Red Hat | Red Hat OpenShift AI 3.4 |
Unaffected:
1791881732 , < *
(rpm)
cpe:/a:redhat:openshift_ai:3.4::el9 |
||
| Red Hat | Red Hat OpenShift AI 3.4 |
Unaffected:
1791883315 , < *
(rpm)
cpe:/a:redhat:openshift_ai:3.4::el9 |
||
| Red Hat | Red Hat OpenShift AI 3.4 |
Unaffected:
1791881486 , < *
(rpm)
cpe:/a:redhat:openshift_ai:3.4::el9 |
||
| Red Hat | Red Hat OpenShift AI 3.4 |
Unaffected:
1791881769 , < *
(rpm)
cpe:/a:redhat:openshift_ai:3.4::el9 |
||
| Red Hat | Red Hat OpenShift AI 3.4 |
Unaffected:
1791885505 , < *
(rpm)
cpe:/a:redhat:openshift_ai:3.4::el9 |
||
| Red Hat | Red Hat OpenShift AI 3.5 |
Unaffected:
1791819252 , < *
(rpm)
cpe:/a:redhat:openshift_ai:3.5::el9 |
||
| Red Hat | Red Hat OpenShift AI 3.5 |
Unaffected:
1791818749 , < *
(rpm)
cpe:/a:redhat:openshift_ai:3.5::el9 |
||
| Red Hat | Red Hat OpenShift AI 3.5 |
Unaffected:
1791819206 , < *
(rpm)
cpe:/a:redhat:openshift_ai:3.5::el9 |
||
| Red Hat | Red Hat OpenShift AI 3.5 |
Unaffected:
1791818979 , < *
(rpm)
cpe:/a:redhat:openshift_ai:3.5::el9 |
||
| Red Hat | Red Hat OpenShift AI 3.5 |
Unaffected:
1791819123 , < *
(rpm)
cpe:/a:redhat:openshift_ai:3.5::el9 |
||
| Red Hat | Red Hat OpenShift AI 3.5 |
Unaffected:
1791818901 , < *
(rpm)
cpe:/a:redhat:openshift_ai:3.5::el9 |
||
| Red Hat | Red Hat OpenShift AI 3.5 |
Unaffected:
1791820333 , < *
(rpm)
cpe:/a:redhat:openshift_ai:3.5::el9 |
||
| Red Hat | Red Hat OpenShift AI 3.5 |
Unaffected:
1791819495 , < *
(rpm)
cpe:/a:redhat:openshift_ai:3.5::el9 |
||
| Red Hat | Red Hat OpenShift AI 3.5 |
Unaffected:
1791819104 , < *
(rpm)
cpe:/a:redhat:openshift_ai:3.5::el9 |
||
| Red Hat | Red Hat Update Infrastructure 5 |
Unaffected:
1786435483 , < *
(rpm)
cpe:/a:redhat:rhui:5::el9 |
||
| Red Hat | Red Hat Update Infrastructure 5 |
Unaffected:
1786533529 , < *
(rpm)
cpe:/a:redhat:rhui:5::el9 |
||
| Red Hat | Red Hat Update Infrastructure 5 |
Unaffected:
1787135742 , < *
(rpm)
cpe:/a:redhat:rhui:5::el9 |
||
| Red Hat | Red Hat Update Infrastructure 5 |
Unaffected:
1787241260 , < *
(rpm)
cpe:/a:redhat:rhui:5::el9 |
||
| Red Hat | Red Hat Enterprise Linux 6 |
cpe:/o:redhat:enterprise_linux:6
|
||
| Red Hat | Red Hat Enterprise Linux 7 |
cpe:/o:redhat:enterprise_linux:7
|
||
| Red Hat | Red Hat OpenShift Container Platform 4 |
cpe:/a:redhat:openshift:4
|
||
| Red Hat | Red Hat OpenShift Container Platform 5 |
cpe:/a:redhat:openshift:5
|
Date Public
2026-06-22 23:22
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"vendor": "Red Hat",
"versions": [
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"lessThan": "*",
"status": "unaffected",
"version": "1791818782",
"versionType": "rpm"
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},
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"collectionURL": "https://catalog.redhat.com/software/containers/",
"cpes": [
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"packageName": "rhai/base-image-rocm-6.4-rhel9",
"product": "Red Hat OpenShift AI 3.3",
"vendor": "Red Hat",
"versions": [
{
"lessThan": "*",
"status": "unaffected",
"version": "1791818782",
"versionType": "rpm"
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},
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"cpes": [
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],
"defaultStatus": "affected",
"packageName": "rhai/base-image-cuda-12.9-rhel9",
"product": "Red Hat OpenShift AI 3.3",
"vendor": "Red Hat",
"versions": [
{
"lessThan": "*",
"status": "unaffected",
"version": "1791818627",
"versionType": "rpm"
}
]
},
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Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.
Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.