# CVE-2025-11624: Buffer overwrite when processing file handles with the SFTP server

> A stack buffer overwrite in the wolfSSH SFTP server allows attackers to execute arbitrary code or cause denial of service via malicious packets.

- **Severity:** Low 1.8 (`CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:A/VC:L/VI:L/VA:L/SC:N/SI:N/SA:L`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 21 Oct 2025
- **Updated:** 21 Oct 2025
- **Also known as:** GHSA-547f-m8pf-r989

## What is CVE-2025-11624?

CVE-2025-11624 is a low-severity memory corruption vulnerability in wolfSSH, published on 21 Oct 2025. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.

### Official description

Potential stack buffer overwrite on the SFTP server side when receiving a malicious packet that has a handle size larger than the system handle or file descriptor size, but smaller than max handle size allowed.

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

## Which versions are affected by CVE-2025-11624?

It affects 1 product.


Products: Wolfssh Wolfssh.

## How do I fix CVE-2025-11624?

No fix has been published for CVE-2025-11624 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-11624 being exploited?

There is no known exploitation of CVE-2025-11624 in the wild and no public exploit code.

## Other vulnerabilities in wolfSSH

- [CVE-2022-32073](https://insights.sbomify.com/CVE-2022-32073/): Integer overflow in n/a (critical 9.8)
- [CVE-2025-14942](https://insights.sbomify.com/CVE-2025-14942/): Authentication Bypass (critical 9.4)
- [CVE-2025-11625](https://insights.sbomify.com/CVE-2025-11625/): Host verification bypass and credential leak (critical 9.4)
- [CVE-2024-2873](https://insights.sbomify.com/CVE-2024-2873/): User authentication bypass in wolfSSH server (critical 9.1)
- [CVE-2026-16516](https://insights.sbomify.com/CVE-2026-16516/): wolfSSH ECDSA host key curve not validated against negotiated algorithm (critical 9.0)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-11624 and fix it if it is affected.

What it is: CVE-2025-11624 is a low-severity memory corruption vulnerability in wolfSSH, published on 21 Oct 2025. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2025-11624 in the wild and no public exploit code.

Affected product: wolfSSH. 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-2025-11624/ (Markdown: https://insights.sbomify.com/CVE-2025-11624/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-11624
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-11624
- OSV: https://osv.dev/vulnerability/CVE-2025-11624

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-11624/
Summaries are generated and may contain mistakes; the official description above is the record.