# CVE-2025-36156: IBM InfoSphere Data Replication VSAM for z/OS Remote Source code execution

> A local user can exploit a stack-based buffer overflow in IBM InfoSphere Data Replication to execute arbitrary code on the system.

- **Severity:** High 7.4 (`CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 7 Oct 2025
- **Updated:** 26 Feb 2026
- **Also known as:** GHSA-28hx-m95w-h3jm

## What is CVE-2025-36156?

CVE-2025-36156 is a high-severity memory corruption vulnerability in IBM InfoSphere Data Replication VSAM for z/OS Remote Source, published on 7 Oct 2025. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

IBM InfoSphere Data Replication VSAM for z/OS Remote Source 11.4 is vulnerable to a stack-based buffer overflow, caused by improper bounds checking. A local user with access to the files storing CECSUB or CECRM on the container could overflow the buffer and execute arbitrary code on the system.

Weakness: CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer)

## Which versions are affected by CVE-2025-36156?

It affects 1 product.


Products: Ibm Infosphere Data Replication Vsam for Z\/Os Remote Source.

## How do I fix CVE-2025-36156?

No fix has been published for CVE-2025-36156 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-36156 being exploited?

There is no known exploitation of CVE-2025-36156 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-36156 and fix it if it is affected.

What it is: CVE-2025-36156 is a high-severity memory corruption vulnerability in IBM InfoSphere Data Replication VSAM for z/OS Remote Source, published on 7 Oct 2025. 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-2025-36156 in the wild and no public exploit code.

Affected product: IBM InfoSphere Data Replication VSAM for z/OS Remote Source. 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-2025-36156/ (Markdown: https://insights.sbomify.com/CVE-2025-36156/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-36156
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-36156
- OSV: https://osv.dev/vulnerability/CVE-2025-36156

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From sbomify Insights: https://insights.sbomify.com/CVE-2025-36156/
Summaries are generated and may contain mistakes; the official description above is the record.