# CVE-2025-9390: vim xxd xxd.c main buffer overflow

> A buffer overflow in Vim's xxd utility allows local attackers to execute arbitrary code or cause a denial of service.

- **Severity:** Medium 4.8 (`CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 24 Aug 2025
- **Updated:** 25 Aug 2025
- **Also known as:** AZL-66681, AZL-66683, BELL-CVE-2025-9390, DEBIAN-CVE-2025-9390, ECHO-2b66-c126-1bab, GHSA-58rr-chmf-5w2j

## What is CVE-2025-9390?

CVE-2025-9390 is a medium-severity memory corruption vulnerability in Vim Vim, published on 24 Aug 2025. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

A security flaw has been discovered in vim up to 9.1.1615. Affected by this vulnerability is the function main of the file src/xxd/xxd.c of the component xxd. The manipulation results in buffer overflow. The attack requires a local approach. The exploit has been released to the public and may be exploited. Upgrading to version 9.1.1616 addresses this issue. The patch is identified as eeef7c77436a78cd27047b0f5fa6925d56de3cb0. It is recommended to upgrade the affected component.

Weakness: CWE-120 (Buffer Copy without Checking Size of Input), CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer)

## Which versions are affected by CVE-2025-9390?

It affects 1 product.


Products: Vim Vim.

## How do I fix CVE-2025-9390?

Upgrade to a fixed version.

## Is CVE-2025-9390 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-9390 exists.

## Other vulnerabilities in Vim Vim

- [CVE-2020-20703](https://insights.sbomify.com/CVE-2020-20703/): Memory corruption in n/a (critical 9.8)
- [CVE-2017-6349](https://insights.sbomify.com/CVE-2017-6349/): Integer overflow in n/a (critical 9.8)
- [CVE-2017-6350](https://insights.sbomify.com/CVE-2017-6350/): Integer overflow in n/a (critical 9.8)
- [CVE-2017-5953](https://insights.sbomify.com/CVE-2017-5953/): Integer overflow in n/a (critical 9.8)
- [CVE-2008-3075](https://insights.sbomify.com/CVE-2008-3075/): Command injection in n/a (critical 9.3)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-9390 and fix it if it is affected.

What it is: CVE-2025-9390 is a medium-severity memory corruption vulnerability in Vim Vim, published on 24 Aug 2025. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-9390 exists.

Affected product: Vim Vim. 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-2025-9390/ (Markdown: https://insights.sbomify.com/CVE-2025-9390/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-9390
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-9390
- OSV: https://osv.dev/vulnerability/CVE-2025-9390

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-9390/
Summaries are generated and may contain mistakes; the official description above is the record.