CVE-2026-94640

Description

A flaw was found in rpcbind. This vulnerability allows a remote, unauthenticated attacker to cause a Denial of Service (DoS) by sending a large number of unique requests. The rpcbind service records previously unseen RPC (Remote Procedure Call) statistics in unbounded in-memory lists, leading to persistent memory growth and increased CPU usage. This can degrade or exhaust service availability.

Overview

State: PUBLISHED
Assigner (CNA): redhat
CVSS severity: HIGH
CVSS score: 7.5 / 10
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Effective score: 7.5 / 10 HIGH source: CNA overview
CWE(s): CWE-400
Reserved: 2026-09-21
Published: 2026-09-22 15:39 UTC
Last updated: 2026-09-22 15:39 UTC
Source: https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/94xxx/CVE-2026-94640.json
Linked Threat: CVE-2026-94640 — Rpcbind: unbounded memory allocation in rpcbind statistics tracking allows unauthenticated remote denial of service

NVD triage scoring NVD CVE 2.0

Layer NVD adds on top of the CNA's CVE record — published / last-modified timestamps, exploitability / impact subscores, and the FIRST.org EPSS probability that this CVE will be exploited in the wild in the next 30 days.

NVD published: 2026-09-22 16:18:18 UTC
NVD last modified: 2026-09-22 19:37:36 UTC
NVD CVSS v3.1: 7.5 / 10 HIGH source: secalert@redhat.com
NVD CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Exploitability subscore: 3.9 / 10
Impact subscore: 3.6 / 10

European Union Vulnerability Database ENISA EUVD

ENISA's official EU repository for curated vulnerability intelligence. Carries a separate identifier (EUVD-YYYY-NNNN) and frequently exposes an earlier-published description + CVSS than NVD does.

EUVD ID: EUVD-2026-84534
Assigner: redhat
Published: Sep 22, 2026, 3:39:49 PM
Updated: Sep 22, 2026, 3:39:49 PM
EUVD base score (CVSS 3.1): 7.5 / 10
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EUVD-reported EPSS: 0.0000
Aliases: GHSA-9j3v-8m9c-fjj6

ENISA description: A flaw was found in rpcbind. This vulnerability allows a remote, unauthenticated attacker to cause a Denial of Service (DoS) by sending a large number of unique requests. The rpcbind service records previously unseen RPC (Remote Procedure Call) statistics in unbounded in-memory lists, leading to persistent memory growth and increased CPU usage. This can degrade or exhaust service availability.

EUVD references (2)

Affected products (7)

Vendor	Product	Versions	Platforms
Red Hat	Red Hat Enterprise Linux 10	—	—
Red Hat	Red Hat Enterprise Linux 6	—	—
Red Hat	Red Hat Enterprise Linux 7	—	—
Red Hat	Red Hat Enterprise Linux 8	—	—
Red Hat	Red Hat Enterprise Linux 9	—	—
Red Hat	Red Hat OpenShift Container Platform 4	—	—
Red Hat	Red Hat OpenShift Container Platform 4	—	—

Vendor references (2)

References embedded in the original CVE record by the assigning CNA.

https://access.redhat.com/security/cve/CVE-2026-94640 vdb-entryx_refsource_REDHAT
RHBZ#2462960 issue-trackingx_refsource_REDHAT

Web references (0)

DuckDuckGo results ranked by threat-intel / vendor advisory domains. Generated by the 🔎 Find references (web) button above — same flow as the Remediations search.

No web references attached yet.

NVD-tagged references (2)

Reference list NVD curates from the CNA record, vendor advisories, and third-party reports. The tag chips below are NVD's analyst-assigned categories.

https://access.redhat.com/security/cve/CVE-2026-94640 secalert@redhat.com
https://bugzilla.redhat.com/show_bug.cgi?id=2462960 secalert@redhat.com

Remediations (10)

Remediations are stored against the linked Threat row; the list below is deduplicated across both pages.

CVE-2026-94640 - Vulnerability Details - OpenCVE

web:app.opencve.io

A flaw was found in rpcbind. This vulnerability allows a remote, unauthenticated attacker to cause a Denial of Service (DoS) by sending a large number of unique requests. The rpcbind service records previously unseen RPC (Remote Procedure Call) statistics in unbounded in-memory lists, leading to persistent memory growth and increased CPU usage. This can degrade or exhaust service availability.

2026-09-23 15:13 UTC
CVE-2026-94640: Red Hat Denial of Service (CVSS 7.5) | CVETodo

web:cvetodo.com

CVE-2026-94640 is a CVSS 7.5 high-severity vulnerability in Red Hat products. Includes technical details, affected versions, and mitigation steps.

2026-09-23 15:13 UTC
Cisco Advance Notification for Publication of September 16, 2026 ...

web:sec.cloudapps.cisco.com

On September 16, 2026 , the Cisco Product Security Incident Response Team (PSIRT) published the advisories that are listed in the following tables. To remediate these vulnerabilities, Cisco strongly recommends that customers upgrade to the fixed software that is indicated in the advisories. For more information about changes in Cisco PSIRT vulnerability disclosure, see Strengthening the ...

2026-09-23 15:13 UTC
CVE-2026-94640 - security-tracker.debian.org

web:security-tracker.debian.org

Vulnerable and fixed packages The table below lists information on source packages.

2026-09-23 15:13 UTC
CVE-2026-94640 : Denial of Service Vulnerability in rpcbind from Red Hat

web:securityvulnerability.io

Learn about the Denial of Service vulnerability in rpcbind that could lead to service disruption. Details on CVE-2026-94640 provided.

2026-09-23 15:13 UTC
August 2026 CVE Advisory Notification - Security

web:support.servicenow.com

Due to additional analysis provided by the security researcher who discovered CVE - 2026 -6876, we have upgraded the severity rating of CVE - 2026 -6876 from High to Critical. This change affects only the severity

2026-09-23 15:13 UTC
Cisco Sept 2026 Hardening — CVSS 10.0 ×4 in ISE, KEV | ThreatAft

web:threataft.com

Cisco September 2026 hardening release: 20+ CVEs across ISE, FMC, Nexus Dashboard, ASA/FTD. CVSS 10.0 ×4. CVE - 2026 -76460 actively exploited. Patch now.

2026-09-23 15:13 UTC
CVE-2026-94640 - vulnerability database | Vulners.com

web:vulners.com

CVE-2026-94640 🗓️ 22 Sep 2026 08:39:49 Reported by redhat Type cve 🔗 web.nvd.nist.gov 👁 19 Views

2026-09-23 15:13 UTC
Oracle Critical Patch Update Advisory - April 2026

web:www.oracle.com

Oracle Critical Patch Update Advisory - April 2026 Description A Critical Patch Update is a collection of patches for multiple security vulnerabilities. These patches address vulnerabilities in Oracle code and in third party components included in Oracle products. These patches are usually cumulative, but each advisory describes only the security patches added since the previous Critical Patch ...

2026-09-23 15:13 UTC
Oracle Critical Patch Update Advisory - July 2026

web:www.oracle.com

This Critical Patch Update contains 1448 new security patches across the product families listed below. Please note that a My Oracle Support (MOS) note summarizing the content of this Critical Patch Update and other Oracle Software Security Assurance activities is located at July 2026 Critical Patch Update: Executive Summary and Analysis.

2026-09-23 15:13 UTC

AI Forensic Analysis

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Raw JSON

The full cvelistV5 record. Download as CVE-2026-94640.json.

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      "workarounds": [
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          "value": "Restrict network access to the `rpcbind` service on port 111 to trusted systems. This can be achieved by configuring firewall rules to limit inbound connections. For example, using `firewalld` on Red Hat Enterprise Linux:\n\n```bash\n# To allow access only from a specific trusted network (e.g., 192.168.1.0/24)\nfirewall-cmd --permanent --add-rich-rule='rule family=\"ipv4\" source address=\"192.168.1.0/24\" port port=\"111\" protocol=\"tcp\" accept'\nfirewall-cmd --permanent --add-rich-rule='rule family=\"ipv4\" source address=\"192.168.1.0/24\" port port=\"111\" protocol=\"udp\" accept'\nfirewall-cmd --reload\n```\n\nIf `rpcbind` is only required for local services, ensure it is configured to listen only on the loopback interface or is otherwise protected from external network exposure. Applying these firewall rules will take effect immediately upon `firewall-cmd --reload` and may temporarily interrupt existing connections to `rpcbind`."
        }
      ],
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