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Fixed

LIN1021-21815 : Security Advisory - vim - CVE-2026-32249

Created: Mar 15, 2026 Updated: Apr 20, 2026

Resolved Date: Mar 18, 2026

Found In Version: 10.21.20.2

Fix Version: 10.21.20.25

Severity: Standard

Applicable for: Wind River Linux LTS 21

Component/s: Userspace

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.