CVE-2023-48706

Vim has heap-use-after-free at /src/charset.c:1770:12 in skipwhite

MEDIUM 4.7EPSS 0.5%

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.

Affected: vim
CVSS v3.1 NVD: 4.7 MEDIUMCVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:H
CVSS v3.1 GITHUB: 3.6 LOWCVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:L
EPSS: 0.54% chance of exploitation in the next 30 days, 45th percentile
Published: 2023-11-22
Updated: 2026-06-23

Proof-of-concept exploits (1)

vim/vim/security/advisories/GHSA-c8qm-x72m-q53q

CVE-2023-48706

Proof-of-concept exploits (1)

Security advisories

References