CVE-2026-32249

Medium

Description

Vim is an open source, command line text editor. From 9.1.0011 to before 9.2.0137, Vim's NFA regex compiler, when encountering a collection containing a combining character as the endpoint of a character range (e.g. [0-0\u05bb]), incorrectly emits the composing bytes of that character as separate NFA states. This corrupts the NFA postfix stack, resulting in NFA_START_COLL having a NULL out1 pointer. When nfa_max_width() subsequently traverses the compiled NFA to estimate match width for the look-behind assertion, it dereferences state->out1->out without a NULL check, causing a segmentation fault. This vulnerability is fixed in 9.2.0137.

SeverityMedium

CVSS5.3

Exploit probability—

ProductVim

PublishedMar 12, 2026

First seenMar 12, 2026

Weakness typeCWE-476NULL pointer dereference

How to fix

Update

vim vim9.2.0137 or later

Affected products

Product	Affected versions	Fixed in
vim vim	9.1.0011 ≤ v < 9.2.0137	9.2.0137

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