# CVE-2026-16913: Vulnerabilities in IBM AIX and PowerVM VIOS

> A stack buffer overflow in IBM AIX and PowerVM VIOS allows remote attackers to execute arbitrary code.

- **Severity:** Critical 9.8 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 19 Aug 2026
- **Updated:** 21 Aug 2026
- **Also known as:** GHSA-59pj-mhpc-mwm2

## What is CVE-2026-16913?

CVE-2026-16913 is a critical memory corruption vulnerability in Ibm Aix, published on 19 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

IBM AIX 7.2, and 7.3 and IBM PowerVM VIOS 4.1 could allow a remote attacker to execute arbitrary code due to a stack buffer overflow.

Weakness: CWE-787 (Out-of-bounds Write)

## Which versions are affected by CVE-2026-16913?

It affects 2 products.


Products: Ibm Aix, Ibm Vios.

## How do I fix CVE-2026-16913?

No fix has been published for CVE-2026-16913 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-16913 being exploited?

There is no known exploitation of CVE-2026-16913 in the wild and no public exploit code.

## Other vulnerabilities in Ibm Aix

- [CVE-2025-36250](https://insights.sbomify.com/CVE-2025-36250/): AIX Code Execution (critical 10.0)
- [CVE-2024-56346](https://insights.sbomify.com/CVE-2024-56346/): IBM AIX command execution (critical 10.0)
- [CVE-2010-3187](https://insights.sbomify.com/CVE-2010-3187/): Memory corruption in n/a (critical 10.0)
- [CVE-2009-3699](https://insights.sbomify.com/CVE-2009-3699/): Memory corruption in n/a (critical 10.0)
- [CVE-2009-3517](https://insights.sbomify.com/CVE-2009-3517/): Auth bypass in n/a (critical 10.0)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-16913 and fix it if it is affected.

What it is: CVE-2026-16913 is a critical memory corruption vulnerability in Ibm Aix, published on 19 Aug 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-2026-16913 in the wild and no public exploit code.

Affected product: Ibm Aix. 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-2026-16913/ (Markdown: https://insights.sbomify.com/CVE-2026-16913/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-16913
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-16913
- OSV: https://osv.dev/vulnerability/CVE-2026-16913

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-16913/
Summaries are generated and may contain mistakes; the official description above is the record.