CVE-2026-73075

Vim: Out-of-bounds Access in Popup Opacity Handling

State: Published
Severity: 4.6 Medium
Published: Aug 11, 2026
Updated: Aug 11, 2026
Reserved: Aug 10, 2026

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.

Scores

CVSS	Score	Vector	Source
4.0	4.6 Medium	CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N	GitHub_M

Weaknesses

CWE-124 Buffer Underwrite ('Buffer Underflow')
CWE-125 Out-of-bounds Read

Affected Products

Product	Versions
vimvim	>= 9.2.0469, < 9.2.0843Affected

References

https://github.com/vim/vim/security/advisories/GHSA-pmvp-6rcj-98p4

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