CVE-2026-25749 Heap Overflow in Vim

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,...

CVE-2026-25749

Vim (editor) is affected by CVE-2026-25749 prior to version 9.1.2132, where the tag file resolution logic mishandles the helpfile option. In get_tagfname() (src/tag.c) the user-controlled helpfile value is copied into a fixed-size heap buffer (MAXPATHL+1, ~4097 bytes) via an unsafe STRCPY without...