# CVE-2026-94640: Rpcbind: unbounded memory allocation in rpcbind statistics tracking allows unauthenticated remote denial of service

> Unauthenticated remote attackers can cause denial of service in rpcbind by sending unique requests that trigger unbounded memory allocation.

- **Severity:** High 7.5 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 22 Sep 2026
- **Updated:** 28 Oct 2026
- **Also known as:** ALSA-2026:83561, ALSA-2026:83562, ALSA-2026:83563, AZL-105807, DEBIAN-CVE-2026-94640, ECHO-bd66-6a5e-e958, GHSA-9j3v-8m9c-fjj6, RHSA-2026:83561, RHSA-2026:83562, RHSA-2026:83563, RLSA-2026:83561, RLSA-2026:83562, RLSA-2026:83563, SUSE-SU-2026:23946-1, SUSE-SU-2026:23959-1, SUSE-SU-2026:24275-1, SUSE-SU-2026:24320-1, SUSE-SU-2026:4446-1, UBUNTU-CVE-2026-94640, openSUSE-SU-2026:11929-1, openSUSE-SU-2026:21975-1

## What is CVE-2026-94640?

CVE-2026-94640 is a high-severity denial of service vulnerability in Red Hat Enterprise Linux 10, published on 22 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official 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.

Weakness: CWE-400 (Uncontrolled Resource Consumption)

## Which versions are affected by CVE-2026-94640?


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `rpcbind` | AlmaLinux:10 | All versions | 1.2.7-3.el10_2.1 |
| `rpcbind` | AlmaLinux:8 | All versions | 1.2.5-11.el8_10 |
| `rpcbind` | AlmaLinux:9 | All versions | 1.2.6-7.el9_8.1 |
| `rpcbind` | Red Hat:enterprise_linux:10.2 | All versions | 0:1.2.7-3.el10_2.1 |
| `rpcbind-debuginfo` | Red Hat:enterprise_linux:10.2 | All versions | 0:1.2.7-3.el10_2.1 |
| `rpcbind-debugsource` | Red Hat:enterprise_linux:10.2 | All versions | 0:1.2.7-3.el10_2.1 |
| `rpcbind` | Red Hat:enterprise_linux:8::baseos | All versions | 0:1.2.5-11.el8_10 |
| `rpcbind-debuginfo` | Red Hat:enterprise_linux:8::baseos | All versions | 0:1.2.5-11.el8_10 |
| `rpcbind-debugsource` | Red Hat:enterprise_linux:8::baseos | All versions | 0:1.2.5-11.el8_10 |
| `rpcbind` | Red Hat:enterprise_linux:9::baseos | All versions | 0:1.2.6-7.el9_8.1 |
| `rpcbind-debuginfo` | Red Hat:enterprise_linux:9::baseos | All versions | 0:1.2.6-7.el9_8.1 |
| `rpcbind-debugsource` | Red Hat:enterprise_linux:9::baseos | All versions | 0:1.2.6-7.el9_8.1 |
| `rpcbind` | Rocky Linux:10 | All versions | 0:1.2.7-3.el10_2.1 |
| `rpcbind` | Rocky Linux:8 | All versions | 0:1.2.5-11.el8_10 |
| `rpcbind` | Rocky Linux:9 | All versions | 0:1.2.6-7.el9_8.1 |
| `rpcbind` | SUSE:Linux Enterprise Server 12 SP5-LTSS | All versions | 0.2.3-24.18.1 |
| `rpcbind` | SUSE:Linux Enterprise Server 16.0 | All versions | 1.2.9-160000.3.1 |
| `rpcbind` | SUSE:Linux Enterprise Server LTSS Extended Security 12 SP5 | All versions | 0.2.3-24.18.1 |
| `rpcbind` | SUSE:Linux Enterprise Server for SAP applications 16.0 | All versions | 1.2.9-160000.3.1 |
| `rpcbind` | SUSE:Linux Micro 6.0 | All versions | 1.2.9-159998.1.1 |
| `rpcbind` | SUSE:Linux Micro 6.1 | All versions | 1.2.9-slfo.1.1_3.1 |
| `rpcbind` | SUSE:Linux Micro 6.2 | All versions | 1.2.9-160000.3.1 |
| `rpcbind` | openSUSE:Leap 16.0 | All versions | 1.2.9-160000.3.1 |
| `rpcbind` | openSUSE:Tumbleweed | All versions | 1.2.9-3.1 |

## How do I fix CVE-2026-94640?

Apply the vendor's patch.

## Is CVE-2026-94640 being exploited?

There is no known exploitation of CVE-2026-94640 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-94640 and fix it if it is affected.

What it is: CVE-2026-94640 is a high-severity denial of service vulnerability in Red Hat Enterprise Linux 10, published on 22 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-94640 in the wild and no public exploit code.

Affected product: Red Hat Enterprise Linux 10. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-94640/ (Markdown: https://insights.sbomify.com/CVE-2026-94640/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-94640
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-94640
- OSV: https://osv.dev/vulnerability/CVE-2026-94640

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-94640/
Summaries are generated and may contain mistakes; the official description above is the record.