# CVE-2026-16461: Rpcbind: rpcbind: stack buffer overflow in rpcinfo rpcbdump() short-mode version-list formatting

> A stack buffer overflow in rpcinfo allows a malicious RPC endpoint to crash the client, causing denial of service for administrators running rpcinfo -s.

- **Severity:** Medium 6.5 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/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:** A user has to click or open something
- **Fix available:** Yes
- **Published:** 21 Jul 2026
- **Updated:** 22 Jul 2026
- **Also known as:** AZL-93306, BELL-CVE-2026-16461, DEBIAN-CVE-2026-16461, ECHO-6fe1-83be-909a, GHSA-qh7w-564q-qrc7, SUSE-SU-2026:23451-1, SUSE-SU-2026:23495-1, SUSE-SU-2026:23518-1, SUSE-SU-2026:23628-1, SUSE-SU-2026:4075-1, UBUNTU-CVE-2026-16461, openSUSE-SU-2026:11728-1, openSUSE-SU-2026:21765-1

## What is CVE-2026-16461?

CVE-2026-16461 is a medium-severity memory corruption vulnerability in Red Hat Enterprise Linux 10, published on 21 Jul 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

### Official description

A stack-based buffer overflow was found in rpcbind's rpcinfo utility. In rpcbdump() short mode (used by `rpcinfo -s`), version numbers from a remote RPCBPROC_DUMP reply are written into a fixed-size stack buffer without bounds checking. A user or administrator who runs `rpcinfo -s` against a malicious or compromised rpcbind endpoint could experience a crash or denial of service of the rpcinfo client.

Weakness: CWE-121 (Stack-based Buffer Overflow)

## Which versions are affected by CVE-2026-16461?


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `rpcbind` | SUSE:Linux Enterprise Server 16.0 | All versions | 1.2.9-160000.2.1 |
| `rpcbind` | SUSE:Linux Enterprise Server LTSS Extended Security 12 SP5 | All versions | 0.2.3-24.15.1 |
| `rpcbind` | SUSE:Linux Enterprise Server for SAP applications 16.0 | All versions | 1.2.9-160000.2.1 |
| `rpcbind` | SUSE:Linux Micro 6.0 | All versions | 1.2.9-2.1 |
| `rpcbind` | SUSE:Linux Micro 6.1 | All versions | 1.2.9-slfo.1.1_2.1 |
| `rpcbind` | SUSE:Linux Micro 6.2 | All versions | 1.2.9-160000.2.1 |
| `rpcbind` | openSUSE:Leap 16.0 | All versions | 1.2.9-160000.2.1 |
| `rpcbind` | openSUSE:Tumbleweed | All versions | 1.2.9-2.1 |

## How do I fix CVE-2026-16461?

Apply the vendor's patch.

## Is CVE-2026-16461 being exploited?

There is no known exploitation of CVE-2026-16461 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-16461 and fix it if it is affected.

What it is: CVE-2026-16461 is a medium-severity memory corruption vulnerability in Red Hat Enterprise Linux 10, published on 21 Jul 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2026-16461 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-2026-16461/ (Markdown: https://insights.sbomify.com/CVE-2026-16461/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-16461
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-16461
- OSV: https://osv.dev/vulnerability/CVE-2026-16461

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-16461/
Summaries are generated and may contain mistakes; the official description above is the record.