# CVE-2026-96263: IBM Power Systems Firmware Buffer Overflow

> Attackers with service processor access can execute arbitrary code on IBM Power Systems hosts via malicious firmware updates.

- **Severity:** High 8.2 (`CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 12 Oct 2026
- **Updated:** 13 Oct 2026
- **Also known as:** GHSA-7x99-v7wf-cwv4

## What is CVE-2026-96263?

CVE-2026-96263 is a high-severity memory corruption vulnerability in IBM PowerVM Hypervisor, published on 12 Oct 2026. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

IBM Power Systems Firmware FW1120.00 through FW1120.01, FW1110.00 through FW1110.31, and FW1060.00 through FW1060.81 is affected by a vulnerability in the host firmware boot process image validation path. An attacker with service access to the service processor can supply a maliciously crafted code update image, allowing arbitrary code to be executed on the host system. Successful exploitation could result in a confidentiality, integrity, and availability impact to the affected host system.

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

## Which versions are affected by CVE-2026-96263?


## How do I fix CVE-2026-96263?

No fix has been published for CVE-2026-96263 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-96263 being exploited?

There is no known exploitation of CVE-2026-96263 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-96263 and fix it if it is affected.

What it is: CVE-2026-96263 is a high-severity memory corruption vulnerability in IBM PowerVM Hypervisor, published on 12 Oct 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-96263 in the wild and no public exploit code.

Affected product: IBM PowerVM Hypervisor. 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-2026-96263/ (Markdown: https://insights.sbomify.com/CVE-2026-96263/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-96263
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-96263
- OSV: https://osv.dev/vulnerability/CVE-2026-96263

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From sbomify Insights: https://insights.sbomify.com/CVE-2026-96263/
Summaries are generated and may contain mistakes; the official description above is the record.