CVE-2026-73075 Vim: Out-of-bounds Access in Popup Opacity Handling
An out-of-bounds access in Vim's popup opacity handling allows attackers to potentially execute code or cause a crash via crafted text properties.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2026-73075?
CVE-2026-73075 is a medium-severity memory corruption vulnerability in Vim Vim, published on 11 Aug 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
Vim is an open source, command line text editor. From 9.2.0469 until 9.2.0843, popup_mark_opacity_zindex() in src/popupwin.c can use a negative w_winrow for a text-property-anchored popup with clipwindow and opacity, indexing before the screen array instead of accounting for w_popup_topoff and causing an out-of-bounds read and conditional write. This issue is fixed in version 9.2.0843.
Which versions are affected by CVE-2026-73075?
It affects 1 product.
Products include Vim Vim.
How do I fix CVE-2026-73075?
Upgrade to a fixed version.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-73075 being exploited?
There is no known exploitation of CVE-2026-73075 in the wild and no public exploit code.
Other vulnerabilities in Vim Vim
Sources
Also known as ALPINE-CVE-2026-73075, AZL-95973, BELL-CVE-2026-73075, DEBIAN-CVE-2026-73075, GHSA-pmvp-6rcj-98p4, MINI-vcg8-7hfw-6c6c.