Rpcbind: unbounded memory allocation in rpcbind statistics tracking allows unauthenticated remote denial of service
Priority MEDIUM 40CWE-400Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- Partial Red Hat: 4 fixed, 4 without a fix
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-400.
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.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.0064 50th percentileScored 2026-11-07
Fix Partial Red Hat: 4 advisoriesRed Hat: 4 fixed, 4 without a fix
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Red Hat | Red Hat Enterprise Linux 10 | — | 1.2.7-3.el10_2.1 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 8 | — | 1.2.5-11.el8_10 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 9 | — | 1.2.6-7.el9_8.1 | Patch available | CNA |
| Red Hat | Red Hat OpenShift Container Platform 4.22 | — | 4.22.9.8.202610241758-0 | Patch available | CNA |
| Red Hat | Red Hat Enterprise Linux 6 | — | — | No fix listed | CNA |
| Red Hat | Red Hat Enterprise Linux 7 | — | — | No fix listed | CNA |
| Red Hat | Red Hat OpenShift Container Platform 4 | — | — | No fix listed | CNA |
| Red Hat | Red Hat OpenShift Container Platform 5 | — | — | No fix listed | CNA |
- Red Hat Enterprise Linux 10 VendorRed Hat Affected — Fixed in 1.2.7-3.el10_2.1 Patch available CNA
- Red Hat Enterprise Linux 8 VendorRed Hat Affected — Fixed in 1.2.5-11.el8_10 Patch available CNA
- Red Hat Enterprise Linux 9 VendorRed Hat Affected — Fixed in 1.2.6-7.el9_8.1 Patch available CNA
- Red Hat OpenShift Container Platform 4.22 VendorRed Hat Affected — Fixed in 4.22.9.8.202610241758-0 Patch available CNA
- Red Hat Enterprise Linux 6 VendorRed Hat Affected — Fixed in — No fix listed CNA
- Red Hat Enterprise Linux 7 VendorRed Hat Affected — Fixed in — No fix listed CNA
- Red Hat OpenShift Container Platform 4 VendorRed Hat Affected — Fixed in — No fix listed CNA
- Red Hat OpenShift Container Platform 5 VendorRed Hat Affected — Fixed in — No fix listed CNA
CPE names CNA · 8
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:/o:redhat:enterprise_linux:10.2 | 10.2 | — | Red Hat |
| cpe:/o:redhat:enterprise_linux:8::baseos | 8 | — | Red Hat |
| cpe:/o:redhat:enterprise_linux:9::baseos | 9 | — | Red Hat |
| cpe:/a:redhat:openshift:4.22::el9 | 4.22 | — | Red Hat |
| cpe:/o:redhat:rhel_els:6 | 6 | — | Red Hat |
| cpe:/o:redhat:rhel_els:7 | 7 | — | Red Hat |
| cpe:/a:redhat:openshift:4 | 4 | — | Red Hat |
| cpe:/a:redhat:openshift:5 | 5 | — | Red Hat |
- cpe:/o:redhat:enterprise_linux:10.2 Versions 10.2 — ·Red Hat
- cpe:/o:redhat:enterprise_linux:8::baseos Versions 8 — ·Red Hat
- cpe:/o:redhat:enterprise_linux:9::baseos Versions 9 — ·Red Hat
- cpe:/a:redhat:openshift:4.22::el9 Versions 4.22 — ·Red Hat
- cpe:/o:redhat:rhel_els:6 Versions 6 — ·Red Hat
- cpe:/o:redhat:rhel_els:7 Versions 7 — ·Red Hat
- cpe:/a:redhat:openshift:4 Versions 4 — ·Red Hat
- cpe:/a:redhat:openshift:5 Versions 5 — ·Red Hat
Remediation
Red Hat 4 advisories
- RHSA-2026:89197 Released 2026-10-27 · Red Hat rating CriticalOpenShift Container Platform 4.22.20 bug fix and security update
- Red Hat OpenShift Container Platform 4.22 rhcos-aarch64-4.22.9.8.202610241758-0, rhcos-ppc64le-4.22.9.8.202610241758-0, rhcos-s390x-4.22.9.8.202610241758-0 +1
- RHSA-2026:83562 Released 2026-10-15 · Red Hat rating Importantrpcbind security update
- Red Hat Enterprise Linux BaseOS (v. 9) rpcbind-1.2.6-7.el9_8.1
- RHSA-2026:83561 Released 2026-10-15 · Red Hat rating Importantrpcbind security update
- Red Hat Enterprise Linux BaseOS (v. 10) rpcbind-1.2.7-3.el10_2.1
Show 1 more Red Hat advisories
- RHSA-2026:83563 Released 2026-10-15 · Red Hat rating Importantrpcbind security update
- Red Hat Enterprise Linux BaseOS (v. 8) rpcbind-1.2.5-11.el8_10
Vendor assessments
Red Hat
Red Hat rating: Important. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 6 | Affected | No fix yet |
| Red Hat Enterprise Linux 7 | Affected | No fix yet |
| Red Hat OpenShift Container Platform 4 | Affected | No fix yet |
| Red Hat OpenShift Container Platform 5 | Affected | No fix yet |
| Red Hat Enterprise Linux BaseOS (v. 10) | Fixed | RHSA-2026:83561 |
| Red Hat Enterprise Linux BaseOS (v. 8) | Fixed | RHSA-2026:83563 |
| Red Hat Enterprise Linux BaseOS (v. 9) | Fixed | RHSA-2026:83562 |
| Red Hat OpenShift Container Platform 4.22 | Fixed | RHSA-2026:89197 |
Timeline
- 2026-10-02 Threatist record created from CVE-2026-94640
- 2026-10-03 Alias added: GHSA-9j3v-8m9c-fjj6
- 2026-10-07 Priority changed: MEDIUM → LOW
- 2026-10-16 Fix available: rpcbind@0:1.2.5-11.el8_10, rpcbind@0:1.2.6-7.el9_8.1, rpcbind@0:1.2.7-3.el10_2.1 · CNA
- 2026-10-16 3 new references · CNA
- 2026-10-16 Fix available: RHSA-2026:83561 · Red Hat
- 2026-10-16 Fix available: RHSA-2026:83562 · Red Hat
- 2026-10-16 Fix available: RHSA-2026:83563 · Red Hat
- 2026-10-16 Fix available: Red Hat Enterprise Linux BaseOS (v. 10), Red Hat Enterprise Linux BaseOS (v. 8), Red Hat Enterprise Linux BaseOS (v. 9) · Red Hat
- 2026-10-28 Fix available: openshift/[email protected] · CNA
- 2026-10-28 1 new reference · CNA
- 2026-10-28 Fix available: Red Hat OpenShift Container Platform 4.22 · Red Hat
- 2026-10-29 Fix available: RHSA-2026:89197 · Red Hat
- 2026-10-30 Affected versions changed · CNA
- 2026-10-30 Affected versions changed · Red Hat
- 2026-11-05 EPSS moved to the 50th–90th percentile
- 2026-11-06 Priority changed: LOW → MEDIUM
References
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Sources
- CVE-2026-94640 · CVE Program
- CVE-2026-94640 · NVD
- FIRST EPSS
- GHSA-9j3v-8m9c-fjj6 · GitHub Advisory Database · CC BY 4.0
- CVE-2026-94640 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences