CVE-2026-94640 (GCVE-0-2026-94640)

Vulnerability from cvelistv5 – Published: 2026-09-22 15:39 – Updated: 2026-10-15 16:39
VLAI
Title
Rpcbind: unbounded memory allocation in rpcbind statistics tracking allows unauthenticated remote denial of service
Summary
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.
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: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-25 23:39 UTC
CWE
  • CWE-400 - Uncontrolled Resource Consumption
Assigner
redhat CNA under the redhat root
CNA scorecard B 82/100 over 1036 records in the last 180 days details
References
URL Tags
https://access.redhat.com/errata/RHSA-2026:83561 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:83562 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:83563 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/security/cve/CVE-2026-94640 vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2462960 issue-trackingx_refsource_REDHAT
Impacted products
Vendor Product Version CPE status
Red Hat Red Hat Enterprise Linux 10 Unaffected: 0:1.2.7-3.el10_2.1 , < * (rpm)
    cpe:/o:redhat:enterprise_linux:10.2
Create a notification for this product.
Red Hat Red Hat Enterprise Linux 8 Unaffected: 0:1.2.5-11.el8_10 , < * (rpm)
    cpe:/o:redhat:enterprise_linux:8::baseos
Create a notification for this product.
Red Hat Red Hat Enterprise Linux 9 Unaffected: 0:1.2.6-7.el9_8.1 , < * (rpm)
    cpe:/o:redhat:enterprise_linux:9::baseos
Create a notification for this product.
Red Hat Red Hat Enterprise Linux 6     cpe:/o:redhat:enterprise_linux:6
Create a notification for this product.
Red Hat Red Hat Enterprise Linux 7     cpe:/o:redhat:enterprise_linux:7
Create a notification for this product.
Red Hat Red Hat OpenShift Container Platform 4     cpe:/a:redhat:openshift:4
Create a notification for this product.
Date Public
2026-07-22 07:45
Credits
This issue was discovered by Found by AISLE in partnership with Red Hat.
Show details on NVD website
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                },
                "type": "Red Hat severity rating"
              }
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              "cvssV3_1": {
                "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"
              },
              "format": "CVSS"
            }
          ],
          "problemTypes": [
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              "descriptions": [
                {
                  "cweId": "CWE-400",
                  "description": "Uncontrolled Resource Consumption",
                  "lang": "en",
                  "type": "CWE"
                }
              ]
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2026-10-15T13:22:46.475Z",
            "orgId": "53f830b8-0a3f-465b-8143-3b8a9948e749",
            "shortName": "redhat"
          },
          "references": [
            {
              "name": "RHSA-2026:83562",
              "tags": [
                "vendor-advisory",
                "x_refsource_REDHAT"
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              "url": "https://access.redhat.com/errata/RHSA-2026:83562"
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              "url": "https://access.redhat.com/security/cve/CVE-2026-94640"
            },
            {
              "name": "RHBZ#2462960",
              "tags": [
                "issue-tracking",
                "x_refsource_REDHAT"
              ],
              "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2462960"
            }
          ],
          "timeline": [
            {
              "lang": "en",
              "time": "2026-04-26T20:30:43.000Z",
              "value": "Reported to Red Hat."
            },
            {
              "lang": "en",
              "time": "2026-07-22T07:45:42.927Z",
              "value": "Made public."
            }
          ],
          "title": "Rpcbind: unbounded memory allocation in rpcbind statistics tracking allows unauthenticated remote denial of service",
          "workarounds": [
            {
              "lang": "en",
              "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=\u0027rule family=\"ipv4\" source address=\"192.168.1.0/24\" port port=\"111\" protocol=\"tcp\" accept\u0027\nfirewall-cmd --permanent --add-rich-rule=\u0027rule family=\"ipv4\" source address=\"192.168.1.0/24\" port port=\"111\" protocol=\"udp\" accept\u0027\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`."
            }
          ],
          "x_generator": {
            "engine": "cvelib 1.8.0"
          },
          "x_redhatCweChain": "CWE-400: Uncontrolled Resource Consumption"
        }
      },
      "cveMetadata": {
        "assignerOrgId": "53f830b8-0a3f-465b-8143-3b8a9948e749",
        "assignerShortName": "redhat",
        "cveId": "CVE-2026-94640",
        "datePublished": "2026-09-22T15:39:49.022Z",
        "dateReserved": "2026-09-21T23:00:00.501Z",
        "dateUpdated": "2026-10-15T13:22:46.475Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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