CVE-2025-26603

Name
CVE-2025-26603
Description
Vim is a greatly improved version of the good old UNIX editor Vi. Vim allows to redirect screen messages using the `:redir` ex command to register, variables and files. It also allows to show the contents of registers using the `:registers` or `:display` ex command. When redirecting the output of `:display` to a register, Vim will free the register content before storing the new content in the register. Now when redirecting the `:display` command to a register that is being displayed, Vim will free the content while shortly afterwards trying to access it, which leads to a use-after-free. Vim pre 9.1.1115 checks in the ex_display() function, that it does not try to redirect to a register while displaying this register at the same time. However this check is not complete, and so Vim does not check the `+` and `*` registers (which typically donate the X11/clipboard registers, and when a clipboard connection is not possible will fall back to use register 0 instead. In Patch 9.1.1115 Vim will therefore skip outputting to register zero when trying to redirect to the clipboard registers `*` or `+`. Users are advised to upgrade. There are no known workarounds for this vulnerability.
NVD Severity
medium
Other trackers
Mailing lists
Exploits
Forges
GitHub (code, issues), Aports (code, issues)

References

Type URI
MISC https://github.com/vim/vim/commit/c0f0e2380e5954f4a52a131bf6b8
CONFIRM https://github.com/vim/vim/security/advisories/GHSA-63p5-mwg2-787v
af854a3a-2127-422b-91ae-364da2661108 https://security.netapp.com/advisory/ntap-20250306-0003/

Match rules

CPE URI Source package Min version Max version
vim >= 0 < 9.1.1115

Vulnerable and fixed packages

Source package Branch Version Maintainer Status
vim edge-main 9.1.0707-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
vim edge-main 9.1.0936-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
vim edge-main 9.1.1012-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
vim edge-main 9.1.1105-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
vim edge-main 9.1.1164-r0 Natanael Copa <ncopa@alpinelinux.org> fixed