cve/2023/CVE-2023-48706.md

### [CVE-2023-48706](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-48706)
![](https://img.shields.io/static/v1?label=Product&message=vim&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=%3D%20%3C%209.0.2121%20&color=brighgreen)
![](https://img.shields.io/static/v1?label=Vulnerability&message=CWE-416%3A%20Use%20After%20Free&color=brighgreen)

### Description

Vim is a UNIX editor that, prior to version 9.0.2121, has a heap-use-after-free vulnerability. When executing a `:s` command for the very first time and using a sub-replace-special atom inside the substitution part, it is possible that the recursive `:s` call causes free-ing of memory which may later then be accessed by the initial `:s` command. The user must intentionally execute the payload and the whole process is a bit tricky to do since it seems to work only reliably for the very first :s command. It may also cause a crash of Vim. Version 9.0.2121 contains a fix for this issue.

### POC

#### Reference
- https://github.com/vim/vim/security/advisories/GHSA-c8qm-x72m-q53q

#### Github
- https://github.com/gandalf4a/crash_report