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Full vulnerability report · 2026
CVE-2026-55655High confidence

Openssh: local mitm of x11 forwarding via abstract unix socket pre-binding in red hat enterprise linux openssh client versions

Red Hat · Red Hat Enterprise Linux 10

Official source article: Red Hat RHSA-2026:36759 ↗. Check the applicable product and release in the original source.

5.0MediumCVSS 3.1
Recommended action
Patch only the product branches with a verified fix

Medium technical severity with no CISA KEV confirmation; remediate through the normal risk-based patch cycle unless local exposure raises the priority. Verified remediation exists for at least one product or source, but 2 structured product or package states remain unresolved. Apply remediation only to the exact product branch confirmed by its source.

Fix availability varies by product
R
Operational reassessment

Published severity in operational context

Open reassessment dashboard →
Published severityMediumOperational priority:Low, lowered one band.downgradedsince 1 Sep 2026

Evidence used

  • No CISA KEV confirmation is currently recorded.
  • Exploitation requires an existing local or physical foothold with privileges.
  • EPSS is 0.12% for the current model date.

Compensating controls

  • Validate the affected product branch and deploy the verified fixed release.
  • Restrict local access and enforce least privilege on affected hosts.
  • Monitor vendor guidance and exploitation sources for a material change.

Verification

  1. Confirm that the asset runs Red Hat Red Hat Enterprise Linux 10 and falls inside the recorded affected range.
  2. Verify the installed build against the product-specific fixed version after deployment.
  3. Validate exposure, authentication requirements and compensating controls in the actual environment.
  4. Reopen this reassessment when CVSS, KEV, EPSS, exploit evidence or remediation changes.
Mitigation target: No default targetRemediation target: Normal maintenance

This automated reassessment organises public evidence. It does not know asset exposure, business impact or control effectiveness and does not replace CVSS or a human risk decision.

Cross-source reconciliation

Remediation availability differs by product scope

Verified remediation exists for at least one product or source, but 2 structured product or package states remain unresolved. Apply remediation only to the exact product branch confirmed by its source.

Distribution package intelligence

Release-specific package status

Debian, ubuntu findings are scoped to the named distribution, release and source package. An absent finding does not mean a package is unaffected.

5 package states
Repository candidate not checked

A published vendor fix does not prove that a matching update is enabled and installable on a particular asset. Confirm the local package candidate before scheduling remediation.

Distribution releaseSource packageVendor stateFixed versionEvidence
Debian trixietrixie · sourceopensshNot affectedDebian marks this release not affected (fixed-version marker 0).Not published in this feedDebian Security Tracker ↗Source updated 5 Oct 2026
Debian bookwormbookworm · sourceopensshNot affectedDebian marks this release not affected (fixed-version marker 0).Not published in this feedDebian Security Tracker ↗Source updated 5 Oct 2026
Debian forkyforky · sourceopensshNot affectedDebian marks this release not affected (fixed-version marker 0).Not published in this feedDebian Security Tracker ↗Source updated 5 Oct 2026
Debian sidsid · sourceopensshNot affectedDebian marks this release not affected (fixed-version marker 0).Not published in this feedDebian Security Tracker ↗Source updated 5 Oct 2026
Ubuntu 24.04 LTSnoble · standard archiveopenssh-ssh1Under evaluationCanonical reports that the package might be affected and still needs evaluation or fixing.Not published in this feedCanonical Ubuntu Security ↗Source updated 5 Oct 2026
Direct vendor intelligence

Authoritative vendor CSAF and VEX advisories

Structured product status and remediation from the issuing vendor. Product-state explanations are always visible; large lists can be searched or downloaded.

1 current
CVE-2026-55655 · CSAF 2.0 · revision 3 · finalRed Hat Product Securityopenssh: Local MITM of X11 forwarding via abstract UNIX socket pre-binding in Red Hat Enterprise Linux OpenSSH client versions
17 known affected

The vendor explicitly identifies these products as affected by this CVE.

  • openssh as a component of Red Hat Enterprise Linux 6
  • openssh-askpass as a component of Red Hat Enterprise Linux 6
  • openssh-clients as a component of Red Hat Enterprise Linux 6
  • openssh-ldap as a component of Red Hat Enterprise Linux 6
  • openssh-server as a component of Red Hat Enterprise Linux 6
  • openssh.src as a component of Red Hat Enterprise Linux 6
  • pam_ssh_agent_auth as a component of Red Hat Enterprise Linux 6
  • openssh as a component of Red Hat Enterprise Linux 7
  • openssh-askpass as a component of Red Hat Enterprise Linux 7
  • openssh-cavs as a component of Red Hat Enterprise Linux 7
  • openssh-clients as a component of Red Hat Enterprise Linux 7
  • openssh-keycat as a component of Red Hat Enterprise Linux 7
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.
Remediation
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258
Optional official sources

National CERT insights
?CERT means Computer Emergency Response Team; CSIRT is the closely related term Computer Security Incident Response Team.

Choose official national sources for this report. Each advisory shows its original language. Your selection is remembered on this device and included in shared links.

Official European source

ENISA European Vulnerability Database

Official EUVD identifiers, advisory evidence and known-exploited context. Missing fields are not treated as evidence of low risk.

1 current
ENISA EUVD identifier

EUVD-2026-38413

No EUVD known-exploited evidence

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.

EUVD state
Present in the current official mapping
Known exploitation
Not present in the current ENISA EUVD known-exploited dataset. This is not proof of no exploitation.
ENISA score
5.0 · CVSS 3.1
Advisory evidence
No linked advisory details stored yet
Recommended actionPatch only the product branches with a verified fix

Medium technical severity with no CISA KEV confirmation; remediate through the normal risk-based patch cycle unless local exposure raises the priority. Verified remediation exists for at least one product or source, but 2 structured product or package states remain unresolved. Apply remediation only to the exact product branch confirmed by its source.

Fix availability varies by product
01

What, why and how

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.

What

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.

Why

The product establishes a communication channel to (or from) an endpoint for privileged or protected operations, but it does not properly ensure that it is communicating with the correct endpoint.

How

An attacker operating through local access may attempt exploitation with low privileges. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.

What

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.

Why

The product establishes a communication channel to (or from) an endpoint for privileged or protected operations, but it does not properly ensure that it is communicating with the correct endpoint.

How

An attacker operating through local access may attempt exploitation with low privileges. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.

02

Exploit reality and attack path

CVSS severity, EPSS forecast probability, public exploit material and CISA-confirmed exploitation are separate signals.

Observed exploitation
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
No confirmed evidence

No CISA KEV match was present at the last successful refresh. This means no confirmation from that source, not proof of no exploitation.

Public PoC / exploit material
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
None recorded

No exploit-tagged reference or CISA SSVC proof-of-concept state is currently recorded. Research may still exist outside the structured feeds.

Likely attack path
local access → Improper Restriction of Communication Channel to Intended Endpoints → cause the confidentiality, integrity or availability impact described by the vendor
Attack surface
Local
Privileges required
Low: a basic authenticated account is required
User interaction
Required interaction required
Attack complexity
High: exploitation depends on specific conditions
Security boundary
Unchanged: impact remains within the vulnerable component's security authority
Weakness
?CWE means Common Weakness Enumeration: a standard category for the underlying weakness.
CWE-923 ↗

CWE-923: Improper Restriction of Communication Channel to Intended Endpoints. The product establishes a communication channel to (or from) an endpoint for privileged or protected operations, but it does not properly ensure that it is communicating with the correct endpoint.

CVSS vector
?CVSS means Common Vulnerability Scoring System. The vector records the metric values used to calculate technical severity.
CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:L/A:N

Common Vulnerability Scoring System 3.1: the compact vector below is decoded into plain language.

AVLocalAttack vector: The attacker needs local access to the vulnerable system.ACHighAttack complexity: Successful exploitation depends on specific conditions outside the attacker's direct control.PRLowPrivileges required: The attacker needs basic user-level privileges.UIRequiredUser interaction: Another user must perform an action for exploitation to succeed.SUnchangedScope: The security impact remains within the vulnerable component's authority.CHighConfidentiality impact: A successful attack can cause a major loss.ILowIntegrity impact: A successful attack can cause a limited loss.ANoneAvailability impact: No direct loss is represented by this metric.
Post-exploitation / living off the land
The issue can support a local privilege or sandbox boundary transition; normal system utilities may then be available in the gained context.
CWE-923
A

Official authority intelligence

Only matched European and national findings are included. Language selectors and unavailable sources are omitted.

ENISA EUVD · EUVD-2026-38413Official EUVD mapping

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.

Official EUVD record ↗
BSI · German · WID-SEC-2026-3043IBM QRadar SIEM: Mehrere Schwachstellen

Ein Angreifer kann mehrere Schwachstellen in IBM QRadar SIEM ausnutzen, um Sicherheitsvorkehrungen zu umgehen, um seine Privilegien zu erhöhen, um einen Denial of Service Angriff durchzuführen, um Informationen offenzulegen, um Dateien zu manipulieren, um einen Cross-Site Scripting Angriff durchzuführen und um beliebigen Programmcode auszuführen.

Official advisory ↗
BSI · German · WID-SEC-2026-2039OpenSSH: Mehrere Schwachstellen

Ein Angreifer kann mehrere Schwachstellen in OpenSSH ausnutzen, um einen Denial of Service Angriff durchzuführen, Sicherheitsmaßnahmen zu umgehen, Daten zu manipulieren oder vertrauliche Informationen offenzulegen.

Official advisory ↗
Cyber Security Agency of Singapore · English · CSA-SB-20260624Security Bulletin 24 June 2026

The Cyber Security Agency of Singapore included this CVE in its official Security Bulletin 24 June 2026, published on 24 June 2026. Open the linked bulletin for the product, severity and reference information published in that issue.

Official advisory ↗
CERT-FR · French · CERTFR-2026-AVI-1094Multiples vulnérabilités dans les produits IBM

d?id=CVE-2026-54513 Référence CVE CVE-2026-54514 https://www.cve.org/CVERecord?id=CVE-2026-54514 Référence CVE CVE-2026-54515 https://www.cve.org/CVERecord?id=CVE-2026-54515 Référence CVE CVE-2026-55153 https://www.cve.org/CVERecord?id=CVE-2026-55153 Référence CVE CVE-2026-55276 https://www.cve.org/CVERecord?id=CVE-2026-55276 Référence CVE CVE-2026-55379 https://www.cve.org/CVERecord?id=CVE-2026-55379 Référence CVE CVE-2026-55380 https://www.cve.org/CVERecord?id=CVE-2026-55380 Référence CVE CVE-2026-55443 https://www.cve.org/CVERecord?id=CVE-2026-55443 Référence CVE CVE-2026-55653 https://www.cve.org/CVERecord?id=CVE-2026-55653 Référence CVE CVE-2026-55655 https://www.cve.org/CVERecord?id=CVE-2026-55655 Référence CVE CVE-2026-55693 https://www.cve.org/CVERecord?id=CVE-2026-55693 Référence CVE CVE-2026-55798 https://www.cve.org/CVERecord?id=CVE-2026-55798 Référence CVE CVE-2026-55955 https://www.cve.org/CVERecord?id=CVE-2026-55955 Référence CVE CVE-2026-55956 https://www.cve.org/CVERecord?id=CVE-2026-55956 Référence CVE CVE-2026-56852 https://www.cve.org/CVERecord?id=CVE-2026-56852 Référence CVE CVE-2026-57455 https://www.cve.org/CVERecord?id=CVE-2026-57455 Référence CVE CVE-2026-57456 https://www.cve.org/CVERecord?id=CVE-2026-57456 Référence CVE CVE-2026-57819 https://www.cve.org/CVERecord?id=

Official advisory ↗
JVN iPedia · Japanese · JVNDB-2026-020944OpenBSD等の複数ベンダの製品における意図するエンドポイントとの通信チャネルの制限に関する脆弱性

OpenSSHに脆弱性が発見されました。Linuxクライアントホスト上の権限のないローカル攻撃者が、クライアント側のX11転送接続をハイジャックする可能性があります。この脆弱性は、X11転送が有効でかつローカルのUNIXドメインXソケットが使用されている場合に、優先される抽象Xソケット名を事前にバインドすることで発生します。攻撃が成功すると、転送されたX11トラフィックの機密性が侵害され、機密性の高いウィンドウ内容や入力が漏えいし、転送されたセッションの一部操作を許してしまう可能性があります。

Official advisory ↗
03

Patch and workaround

Operational remediation based on structured source evidence.

Status
?Patch availability is based on structured fixed-version fields and authoritative update references. If no fix is verified, check the vendor advisory before making a change.
Fix availability varies by product
Affected
Fixed
Action
Use the product-specific evidence above. Patch only products with a verified fixed release, and keep every affected or under-investigation state without a matching fix in the remediation queue.
Workaround
No verified workaround is recorded. Limit untrusted access and use least privilege until authoritative guidance is available.
04

Evidence and provenance

Published 23 Jun 2026 · Last source change 1 Sept 2026, 08:40 UTC · CWE-923 · Improper Restriction of Communication Channel to Intended Endpoints

CVE recordCVE.org · 5.2
CVSS sourceCNA
EPSS source
?The date BlackTree first stored a score for this CVE from the daily FIRST EPSS feed.
FIRST · tracked since 2026-08-14
European sourceENISA EUVD · EUVD-2026-38413
Product sourceVendor CSAF · Red Hat Product Security
Remediation sourceVendor CSAF · Red Hat Product Security
CWE sourceCNA
NVD statusNVD modified after enrichment

Core structured fields are present and their contributing authorities are shown above.

Material change intelligence

What changed after publication

View recent updates ↗
  1. Affected versionsThe structured affected or fixed version information changed.
    Before
    See the vendor and CVE records for the affected range. · Fixed: 0:9.9p1-25.el10_2 < *; 0:8.0p1-30.el8_10 < *; 0:9.9p1-9.el9_8 < *; 10.3p1-6.hum1 < *; 1786435483 < *; 1786533529 < *
    After
    See the vendor and CVE records for the affected range. · Fixed: Red Hat Enterprise Linux 10: 0:9.9p1-25.el10_2 < *; Red Hat Enterprise Linux 8: 0:8.0p1-30.el8_10 < *; Red Hat Enterprise Linux 9: 0:9.9p1-9.el9_8 < *; Red Hat Hardened Images: 10.3p1-6.hum1 < *; Red Hat Update Infrastructure 5: 1786435483 < *, 1786533529 < *, 1787135742 < *, 1787241260 < *
    CNA ↗
  2. Vendor guidanceAuthoritative vendor guidance changed: added remediation: access.redhat.com/RHSA-2026:36759; removed remediation: access.redhat.com/RHSA-2026:58981; removed vendor advisory: access.redhat.com/RHSA-2026:58981.
    Before
    remediation: access.redhat.com/RHSA-2026:58981 · vendor advisory: access.redhat.com/CVE-2026-55655 · vendor advisory: access.redhat.com/RHSA-2026:58981 · 1 more references
    After
    remediation: access.redhat.com/RHSA-2026:36759 · vendor advisory: access.redhat.com/CVE-2026-55655 · vendor advisory: bugzilla.redhat.com/show_bug.cgi?id=2462250
    secalert@redhat.com ↗
  3. Vendor guidanceAuthoritative vendor guidance changed: added remediation: access.redhat.com/RHSA-2026:58981; added vendor advisory: access.redhat.com/RHSA-2026:58981; removed remediation: access.redhat.com/RHSA-2026:36759.
    Before
    remediation: access.redhat.com/RHSA-2026:36759 · vendor advisory: access.redhat.com/CVE-2026-55655 · vendor advisory: bugzilla.redhat.com/show_bug.cgi?id=2462250
    After
    remediation: access.redhat.com/RHSA-2026:58981 · vendor advisory: access.redhat.com/CVE-2026-55655 · vendor advisory: access.redhat.com/RHSA-2026:58981 · 1 more references
    access.redhat.com ↗
  4. Affected versionsThe structured affected or fixed version information changed.
    Before
    openssh as a component of Red Hat Enterprise Linux 6; openssh-askpass as a component of Red Hat Enterprise Linux 6; openssh-clients as a component of Red Hat Enterprise Linux 6; openssh-ldap as a component of Red Hat Enterprise Linux 6; openssh-server as a component of Red Hat Enterprise Linux 6; openssh.src as a component of Red Hat Enterprise Linux 6; pam_ssh_agent_auth as a component of Red Hat Enterprise Linux 6; openssh as a component of Red Hat Enterprise Linux 7; openssh-askpass as a component of Red Hat Enterprise Linux 7; openssh-cavs as a component of Red Hat Enterprise Linux 7; openssh-clients as a component of Red Hat Enterprise Linux 7; openssh-keycat as a component of Red Hat Enterprise Linux 7; openssh-ldap as a component of Red Hat Enterprise Linux 7; openssh-server as a component of Red Hat Enterprise Linux 7; openssh-server-sysvinit as a component of Red Hat Enterprise Linux 7; openssh.src as a component of Red Hat Enterprise Linux 7; pam_ssh_agent_auth as a component of Red Hat Enterprise Linux 7 · Fixed: openssh-askpass-0:9.9p1-25.el10_2.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); openssh-askpass-0:9.9p1-25.el10_2.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10); openssh-askpass-0:9.9p1-25.el10_2.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10); openssh-askpass-0:9.9p1-25.el10_2.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10); openssh-askpass-debuginfo-0:9.9p1-25.el10_2.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); openssh-askpass-debuginfo-0:9.9p1-25.el10_2.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10); openssh-askpass-debuginfo-0:9.9p1-25.el10_2.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10); openssh-askpass-debuginfo-0:9.9p1-25.el10_2.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10); openssh-clients-debuginfo-0:9.9p1-25.el10_2.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); openssh-clients-debuginfo-0:9.9p1-25.el10_2.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10); openssh-clients-debuginfo-0:9.9p1-25.el10_2.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10); openssh-clients-debuginfo-0:9.9p1-25.el10_2.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10); openssh-debuginfo-0:9.9p1-25.el10_2.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); openssh-debuginfo-0:9.9p1-25.el10_2.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10); openssh-debuginfo-0:9.9p1-25.el10_2.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10); openssh-debuginfo-0:9.9p1-25.el10_2.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10); openssh-debugsource-0:9.9p1-25.el10_2.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); openssh-debugsource-0:9.9p1-25.el10_2.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10); openssh-debugsource-0:9.9p1-25.el10_2.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10); openssh-debugsource-0:9.9p1-25.el10_2.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10); openssh-keycat-debuginfo-0:9.9p1-25.el10_2.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); openssh-keycat-debuginfo-0:9.9p1-25.el10_2.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10); openssh-keycat-debuginfo-0:9.9p1-25.el10_2.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10); openssh-keycat-debuginfo-0:9.9p1-25.el10_2.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10); openssh-keysign-0:9.9p1-25.el10_2.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); openssh-keysign-0:9.9p1-25.el10_2.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10); openssh-keysign-0:9.9p1-25.el10_2.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10); openssh-keysign-0:9.9p1-25.el10_2.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10); openssh-keysign-debuginfo-0:9.9p1-25.el10_2.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); openssh-keysign-debuginfo-0:9.9p1-25.el10_2.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10); and 258 more
    After
    openssh as a component of Red Hat Enterprise Linux 6; openssh-askpass as a component of Red Hat Enterprise Linux 6; openssh-clients as a component of Red Hat Enterprise Linux 6; openssh-ldap as a component of Red Hat Enterprise Linux 6; openssh-server as a component of Red Hat Enterprise Linux 6; openssh.src as a component of Red Hat Enterprise Linux 6; pam_ssh_agent_auth as a component of Red Hat Enterprise Linux 6; openssh as a component of Red Hat Enterprise Linux 7; openssh-askpass as a component of Red Hat Enterprise Linux 7; openssh-cavs as a component of Red Hat Enterprise Linux 7; openssh-clients as a component of Red Hat Enterprise Linux 7; openssh-keycat as a component of Red Hat Enterprise Linux 7; openssh-ldap as a component of Red Hat Enterprise Linux 7; openssh-server as a component of Red Hat Enterprise Linux 7; openssh-server-sysvinit as a component of Red Hat Enterprise Linux 7; openssh.src as a component of Red Hat Enterprise Linux 7; pam_ssh_agent_auth as a component of Red Hat Enterprise Linux 7 · Fixed: openssh-askpass-0:9.9p1-25.el10_2.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); openssh-askpass-0:9.9p1-25.el10_2.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10); openssh-askpass-0:9.9p1-25.el10_2.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10); openssh-askpass-0:9.9p1-25.el10_2.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10); openssh-askpass-debuginfo-0:9.9p1-25.el10_2.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); openssh-askpass-debuginfo-0:9.9p1-25.el10_2.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10); openssh-askpass-debuginfo-0:9.9p1-25.el10_2.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10); openssh-askpass-debuginfo-0:9.9p1-25.el10_2.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10); openssh-clients-debuginfo-0:9.9p1-25.el10_2.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); openssh-clients-debuginfo-0:9.9p1-25.el10_2.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10); openssh-clients-debuginfo-0:9.9p1-25.el10_2.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10); openssh-clients-debuginfo-0:9.9p1-25.el10_2.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10); openssh-debuginfo-0:9.9p1-25.el10_2.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); openssh-debuginfo-0:9.9p1-25.el10_2.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10); openssh-debuginfo-0:9.9p1-25.el10_2.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10); openssh-debuginfo-0:9.9p1-25.el10_2.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10); openssh-debugsource-0:9.9p1-25.el10_2.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); openssh-debugsource-0:9.9p1-25.el10_2.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10); openssh-debugsource-0:9.9p1-25.el10_2.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10); openssh-debugsource-0:9.9p1-25.el10_2.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10); openssh-keycat-debuginfo-0:9.9p1-25.el10_2.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); openssh-keycat-debuginfo-0:9.9p1-25.el10_2.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10); openssh-keycat-debuginfo-0:9.9p1-25.el10_2.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10); openssh-keycat-debuginfo-0:9.9p1-25.el10_2.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10); openssh-keysign-0:9.9p1-25.el10_2.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); openssh-keysign-0:9.9p1-25.el10_2.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10); openssh-keysign-0:9.9p1-25.el10_2.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10); openssh-keysign-0:9.9p1-25.el10_2.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10); openssh-keysign-debuginfo-0:9.9p1-25.el10_2.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); openssh-keysign-debuginfo-0:9.9p1-25.el10_2.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10); and 260 more
    Red Hat Product Security ↗
Material fields only · duplicate refreshes suppressed · history retained for the configured operational retention period
CVE published
Fixed release or patch reference recorded
ENISA EUVD · EUVD-2026-38413↗Vendor advisory↗Vendor advisory↗CVE authority or vendor reference · Red Hat RHSA-2026:36759↗Official CVE record (CNA and ADP data)↗NVD record↗
Technical terms and abbreviations used in this report
CVE
Common Vulnerabilities and Exposures: the public identifier for one disclosed vulnerability.
CVSS
Common Vulnerability Scoring System: a technical severity framework; it is not patching priority by itself.
EPSS
Exploit Prediction Scoring System: FIRST's estimate of the probability that exploitation activity will be observed in the next 30 days; it is a forecast, not confirmation.
CWE
Common Weakness Enumeration: the standard category describing the underlying software or hardware weakness.
CNA
CVE Numbering Authority: an organisation authorised to assign and publish CVE records.
CISA ADP
Cybersecurity and Infrastructure Security Agency Authorized Data Publisher: structured enrichment added to a CVE record.
NVD
National Vulnerability Database: NIST's enrichment service for CVE records.
CERT / CSIRT
A computer security incident response team that publishes warnings or coordinates incident response.
PoC
Proof of concept: public material that demonstrates or helps reproduce exploitation.
CSAF
Common Security Advisory Framework: a machine-readable format for security advisories.
LoTL
Living off the land: abuse of legitimate tools or system functions during an attack.
Free version - for non-commercial use only.CVE-2026-55655 · cve.blacktree.nl