CVE-2026-25749: Heap-based Buffer Overflow

Vim is an open source, command line text editor. Prior to version 9.1.2132, a heap buffer overflow vulnerability exists in Vim's tag file resolution logic when processing the 'helpfile' option. The vulnerability is located in the gettagfname function in src/tag.c. When processing help file tags,...

Use After Free in function do_tag

Description Use After Free in function dotag at vim/src/tag.c:807. vim version ./vim --version VIM - Vi IMproved 9.0 2022 Jun 28, compiled Sep 2 2022 22:56:19 Included patches: 1-363 Proof of Concept ./vim -u NONE -i NONE -n -m -X -Z -e -s -S /home/elva/fuzzvim/test/poc8huaf.dat -c :qa!...