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high · CVSS 7.5

CVE-2026-94640

Rpcbind: unbounded memory allocation in rpcbind statistics tracking allows unauthenticated remote denial of service

Published 22 Sept 2026 · Source updated 5 Nov 2026 · Retrieved 2026-11-05 01:18 UTC

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What happened?

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.

Description supplied by CVE Program. Formatting is simplified; follow the original advisory for full details.

Affected software and versions

Source-provided software and version information
SoftwareVersion informationFixed version
rpcbindRed Hatunaffected: 0:1.2.7-3.el10_2.1 to < *See vendor advisory
rpcbindRed Hatunaffected: 0:1.2.5-11.el8_10 to < *See vendor advisory
rpcbindRed Hatunaffected: 0:1.2.6-7.el9_8.1 to < *See vendor advisory
openshift/ose-rhel-coreos-9Red Hatunaffected: 4.22.9.8.202610241758-0 to < *See vendor advisory
rpcbindRed HatDefault status: affectedSee vendor advisory
rpcbindRed HatDefault status: affectedSee vendor advisory
openshift/ose-rhel-coreos-8Red HatDefault status: affectedSee vendor advisory
openshift/ose-rhel-coreos-9Red HatDefault status: affectedSee vendor advisory

Version information comes from the source record and can include unaffected products and exceptions. Distribution packages may contain backported fixes: an older upstream version alone does not prove a server is affected.

Is it being exploited?

This CVE was not listed in the CISA catalogue at our last retrieval. This does not establish that exploitation is absent.

CISA data retrieved 2026-11-06 16:38 UTC. Check CISA ↗

How to respond

  1. Confirm the product, installed package version, and any configuration requirements in the vendor advisory.
  2. Follow the vendor’s remediation or workaround guidance in the references below. Structured fixed-version data is unavailable here; the publisher’s description may include a fix or workaround.
  3. Restart affected services if required, then verify the running version. Known exploitation may warrant investigation as well as patching.

Sources and remediation references

This public advisory does not determine whether a particular server is affected. Records are refreshed as sources change; verify urgent decisions against the original advisory.

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