CVE-2023-48706

Name	CVE-2023-48706
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.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
vim (PTS)	bullseye	2:8.2.2434-3+deb11u1	vulnerable
	bookworm	2:9.0.1378-2	vulnerable
	trixie	2:9.1.0861-1	fixed
	sid	2:9.1.0967-1	fixed

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
vim	source	(unstable)	2:9.0.2189-1	unimportant

Notes

https://github.com/vim/vim/security/advisories/GHSA-c8qm-x72m-q53q
Fixed by: https://github.com/vim/vim/commit/26c11c56888d01e298cd8044caf8 (v9.0.2121)
Crash in CLI tool, no security impact