Vulnerability-Lookup

RHSA-2026:98622

Vulnerability from csaf_redhat - Published: 2026-11-11 11:43 - Updated: 2026-11-11 11:47

Summary

Red Hat Security Advisory: gnome-remote-desktop security update

Severity

Moderate

Notes

Topic: An update for gnome-remote-desktop is now available for Red Hat Enterprise Linux 10. Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

Details: GNOME Remote Desktop is a remote desktop and screen sharing service for the GNOME desktop environment. Security Fix(es): * gnome-remote-desktop: gnome-remote-desktop: unauthenticated RDP sockets lack a handshake deadline (CVE-2026-96541) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Terms of Use: This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.

CVE-2026-96541

A denial-of-service flaw was found in gnome-remote-desktop. An unauthenticated remote attacker can open RDP connections without completing the handshake and retain the connection-throttling slots indefinitely because no pre-authentication handshake deadline is enforced. By exhausting the global connection limit, an attacker can prevent new RDP clients from connecting until a holding socket is closed.

7.5 (High)


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

CWE-400 - Uncontrolled Resource Consumption

Affected products

Fixed 13 products

Product	Version	Remediation
Unresolved product id: AppStream-10.3.Z:gnome-remote-desktop-0:49.3-18.el10_3.aarch64	—	Vendor Fix fix Workaround
Unresolved product id: AppStream-10.3.Z:gnome-remote-desktop-0:49.3-18.el10_3.ppc64le	—	Vendor Fix fix Workaround
Unresolved product id: AppStream-10.3.Z:gnome-remote-desktop-0:49.3-18.el10_3.s390x	—	Vendor Fix fix Workaround
Unresolved product id: AppStream-10.3.Z:gnome-remote-desktop-0:49.3-18.el10_3.src	—	Vendor Fix fix Workaround
Unresolved product id: AppStream-10.3.Z:gnome-remote-desktop-0:49.3-18.el10_3.x86_64	—	Vendor Fix fix Workaround
Unresolved product id: AppStream-10.3.Z:gnome-remote-desktop-debuginfo-0:49.3-18.el10_3.aarch64	—	Vendor Fix fix Workaround
Unresolved product id: AppStream-10.3.Z:gnome-remote-desktop-debuginfo-0:49.3-18.el10_3.ppc64le	—	Vendor Fix fix Workaround
Unresolved product id: AppStream-10.3.Z:gnome-remote-desktop-debuginfo-0:49.3-18.el10_3.s390x	—	Vendor Fix fix Workaround
Unresolved product id: AppStream-10.3.Z:gnome-remote-desktop-debuginfo-0:49.3-18.el10_3.x86_64	—	Vendor Fix fix Workaround
Unresolved product id: AppStream-10.3.Z:gnome-remote-desktop-debugsource-0:49.3-18.el10_3.aarch64	—	Vendor Fix fix Workaround
Unresolved product id: AppStream-10.3.Z:gnome-remote-desktop-debugsource-0:49.3-18.el10_3.ppc64le	—	Vendor Fix fix Workaround
Unresolved product id: AppStream-10.3.Z:gnome-remote-desktop-debugsource-0:49.3-18.el10_3.s390x	—	Vendor Fix fix Workaround
Unresolved product id: AppStream-10.3.Z:gnome-remote-desktop-debugsource-0:49.3-18.el10_3.x86_64	—	Vendor Fix fix Workaround

Threats

Impact Moderate

References

9 references

URL	Category
https://access.redhat.com/errata/RHSA-2026:98622	self
https://access.redhat.com/security/updates/classi…	external
https://bugzilla.redhat.com/show_bug.cgi?id=2539385	external
https://security.access.redhat.com/data/csaf/v2/a…	self
https://access.redhat.com/security/cve/CVE-2026-96541	self
https://bugzilla.redhat.com/show_bug.cgi?id=2539385	external
https://www.cve.org/CVERecord?id=CVE-2026-96541	external
https://nvd.nist.gov/vuln/detail/CVE-2026-96541	external
https://gitlab.gnome.org/GNOME/gnome-remote-deskt…	external

Acknowledgments

Bynario Atlas

JSON

To clipboard

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  "vulnerabilities": [
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        {
          "category": "description",
          "text": "A denial-of-service flaw was found in gnome-remote-desktop. An unauthenticated remote attacker can open RDP connections without completing the handshake and retain the connection-throttling slots indefinitely because no pre-authentication handshake deadline is enforced. By exhausting the global connection limit, an attacker can prevent new RDP clients from connecting until a holding socket is closed.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "gnome-remote-desktop: gnome-remote-desktop: unauthenticated RDP sockets lack a handshake deadline",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "This Moderate-impact denial-of-service flaw in `gnome-remote-desktop` allows an unauthenticated remote attacker to prevent new RDP connections. By holding open unauthenticated RDP sockets indefinitely, an attacker can exhaust the default global connection limit. Exploitation requires connecting from at least two distinct source IP addresses to fully utilize the default per-source and global connection limits. Existing authenticated RDP sessions remain unaffected.",
          "title": "Statement"
        },
        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
          "title": "CVSS score applicability"
        }
      ],
      "product_status": {
        "fixed": [
          "AppStream-10.3.Z:gnome-remote-desktop-0:49.3-18.el10_3.aarch64",
          "AppStream-10.3.Z:gnome-remote-desktop-0:49.3-18.el10_3.ppc64le",
          "AppStream-10.3.Z:gnome-remote-desktop-0:49.3-18.el10_3.s390x",
          "AppStream-10.3.Z:gnome-remote-desktop-0:49.3-18.el10_3.src",
          "AppStream-10.3.Z:gnome-remote-desktop-0:49.3-18.el10_3.x86_64",
          "AppStream-10.3.Z:gnome-remote-desktop-debuginfo-0:49.3-18.el10_3.aarch64",
          "AppStream-10.3.Z:gnome-remote-desktop-debuginfo-0:49.3-18.el10_3.ppc64le",
          "AppStream-10.3.Z:gnome-remote-desktop-debuginfo-0:49.3-18.el10_3.s390x",
          "AppStream-10.3.Z:gnome-remote-desktop-debuginfo-0:49.3-18.el10_3.x86_64",
          "AppStream-10.3.Z:gnome-remote-desktop-debugsource-0:49.3-18.el10_3.aarch64",
          "AppStream-10.3.Z:gnome-remote-desktop-debugsource-0:49.3-18.el10_3.ppc64le",
          "AppStream-10.3.Z:gnome-remote-desktop-debugsource-0:49.3-18.el10_3.s390x",
          "AppStream-10.3.Z:gnome-remote-desktop-debugsource-0:49.3-18.el10_3.x86_64"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2026-96541"
        },
        {
          "category": "external",
          "summary": "RHBZ#2539385",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2539385"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2026-96541",
          "url": "https://www.cve.org/CVERecord?id=CVE-2026-96541"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-96541",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-96541"
        },
        {
          "category": "external",
          "summary": "https://gitlab.gnome.org/GNOME/gnome-remote-desktop/-/issues/356",
          "url": "https://gitlab.gnome.org/GNOME/gnome-remote-desktop/-/issues/356"
        }
      ],
      "release_date": "2026-08-23T15:01:23+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2026-11-11T11:43:56+00:00",
          "details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258",
          "product_ids": [
            "AppStream-10.3.Z:gnome-remote-desktop-0:49.3-18.el10_3.aarch64",
            "AppStream-10.3.Z:gnome-remote-desktop-0:49.3-18.el10_3.ppc64le",
            "AppStream-10.3.Z:gnome-remote-desktop-0:49.3-18.el10_3.s390x",
            "AppStream-10.3.Z:gnome-remote-desktop-0:49.3-18.el10_3.src",
            "AppStream-10.3.Z:gnome-remote-desktop-0:49.3-18.el10_3.x86_64",
            "AppStream-10.3.Z:gnome-remote-desktop-debuginfo-0:49.3-18.el10_3.aarch64",
            "AppStream-10.3.Z:gnome-remote-desktop-debuginfo-0:49.3-18.el10_3.ppc64le",
            "AppStream-10.3.Z:gnome-remote-desktop-debuginfo-0:49.3-18.el10_3.s390x",
            "AppStream-10.3.Z:gnome-remote-desktop-debuginfo-0:49.3-18.el10_3.x86_64",
            "AppStream-10.3.Z:gnome-remote-desktop-debugsource-0:49.3-18.el10_3.aarch64",
            "AppStream-10.3.Z:gnome-remote-desktop-debugsource-0:49.3-18.el10_3.ppc64le",
            "AppStream-10.3.Z:gnome-remote-desktop-debugsource-0:49.3-18.el10_3.s390x",
            "AppStream-10.3.Z:gnome-remote-desktop-debugsource-0:49.3-18.el10_3.x86_64"
          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2026:98622"
        },
        {
          "category": "workaround",
          "details": "Disable the RDP listener when it is not required, or restrict access to the RDP port to trusted networks or hosts at the network boundary. No application-level mitigation that preserves unrestricted RDP access is known.",
          "product_ids": [
            "AppStream-10.3.Z:gnome-remote-desktop-0:49.3-18.el10_3.aarch64",
            "AppStream-10.3.Z:gnome-remote-desktop-0:49.3-18.el10_3.ppc64le",
            "AppStream-10.3.Z:gnome-remote-desktop-0:49.3-18.el10_3.s390x",
            "AppStream-10.3.Z:gnome-remote-desktop-0:49.3-18.el10_3.src",
            "AppStream-10.3.Z:gnome-remote-desktop-0:49.3-18.el10_3.x86_64",
            "AppStream-10.3.Z:gnome-remote-desktop-debuginfo-0:49.3-18.el10_3.aarch64",
            "AppStream-10.3.Z:gnome-remote-desktop-debuginfo-0:49.3-18.el10_3.ppc64le",
            "AppStream-10.3.Z:gnome-remote-desktop-debuginfo-0:49.3-18.el10_3.s390x",
            "AppStream-10.3.Z:gnome-remote-desktop-debuginfo-0:49.3-18.el10_3.x86_64",
            "AppStream-10.3.Z:gnome-remote-desktop-debugsource-0:49.3-18.el10_3.aarch64",
            "AppStream-10.3.Z:gnome-remote-desktop-debugsource-0:49.3-18.el10_3.ppc64le",
            "AppStream-10.3.Z:gnome-remote-desktop-debugsource-0:49.3-18.el10_3.s390x",
            "AppStream-10.3.Z:gnome-remote-desktop-debugsource-0:49.3-18.el10_3.x86_64"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          },
          "products": [
            "AppStream-10.3.Z:gnome-remote-desktop-0:49.3-18.el10_3.aarch64",
            "AppStream-10.3.Z:gnome-remote-desktop-0:49.3-18.el10_3.ppc64le",
            "AppStream-10.3.Z:gnome-remote-desktop-0:49.3-18.el10_3.s390x",
            "AppStream-10.3.Z:gnome-remote-desktop-0:49.3-18.el10_3.src",
            "AppStream-10.3.Z:gnome-remote-desktop-0:49.3-18.el10_3.x86_64",
            "AppStream-10.3.Z:gnome-remote-desktop-debuginfo-0:49.3-18.el10_3.aarch64",
            "AppStream-10.3.Z:gnome-remote-desktop-debuginfo-0:49.3-18.el10_3.ppc64le",
            "AppStream-10.3.Z:gnome-remote-desktop-debuginfo-0:49.3-18.el10_3.s390x",
            "AppStream-10.3.Z:gnome-remote-desktop-debuginfo-0:49.3-18.el10_3.x86_64",
            "AppStream-10.3.Z:gnome-remote-desktop-debugsource-0:49.3-18.el10_3.aarch64",
            "AppStream-10.3.Z:gnome-remote-desktop-debugsource-0:49.3-18.el10_3.ppc64le",
            "AppStream-10.3.Z:gnome-remote-desktop-debugsource-0:49.3-18.el10_3.s390x",
            "AppStream-10.3.Z:gnome-remote-desktop-debugsource-0:49.3-18.el10_3.x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Moderate"
        }
      ],
      "title": "gnome-remote-desktop: gnome-remote-desktop: unauthenticated RDP sockets lack a handshake deadline"
    }
  ]
}

CVE-2026-96541 (GCVE-0-2026-96541)

Vulnerability from cvelistv5 – Published: 2026-09-23 18:08 – Updated: 2026-11-11 11:47

Title

Gnome-remote-desktop: gnome-remote-desktop: unauthenticated rdp sockets lack a handshake deadline

Summary

Severity

7.5 (High)


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

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-10-14 03:59 UTC

CWE

CWE-400 - Uncontrolled Resource Consumption

Assigner

redhat CNA under the redhat root

CNA scorecard B 82/100 over 1176 records in the last 180 days details

References

4 references

URL	Tags
https://access.redhat.com/errata/RHSA-2026:98622	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/security/cve/CVE-2026-96541	vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2539385	issue-trackingx_refsource_REDHAT
https://gitlab.gnome.org/GNOME/gnome-remote-deskt…

Impacted products

3 products

Vendor	Product	Version
Red Hat	Red Hat Enterprise Linux 10	Unaffected: 0:49.3-18.el10_3 , < * (rpm) cpe:/o:redhat:enterprise_linux:10.3
Red Hat	Red Hat Enterprise Linux 8	cpe:/a:redhat:enterprise_linux:8
Red Hat	Red Hat Enterprise Linux 9	cpe:/a:redhat:enterprise_linux:9

Date Public

2026-08-23 15:01

Credits

Upstream acknowledges Bynario Atlas as the original reporter.

Show details on NVD website

JSON

To clipboard

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                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-10-14T03:59:26.711449Z",
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            "tags": [
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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.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

Order JSON

How durations are calculated

Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.

Each result shows its source dates. A negative interval means the end event came first; when date-only inputs leave the order open, the result says so. Date-only inputs are approximate. The earliest evidence wins: KEV report dates and sightings are labelled as such. Records describing another vulnerability are listed but never calculated from, and a PoC alone does not establish exploitation. Missing patch evidence does not prove that no patch exists. Filters below change the event list only.

Publication & reservation Sightings KEV catalogs Other timestamps

Loading timeline…

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.

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.

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