vim-patch:9.2.0075: [security]: Buffer underflow with emacs tag file

Problem:  When parsing a malformed Emacs-style tags file, a 1-byte
          heap-buffer-underflow read occurs if the 0x7f delimiter
          appears at the very beginning of a line. This happens
          because the code attempts to scan backward for a tag
          name from the delimiter without checking if space exists.
          (ehdgks0627, un3xploitable)
Solution: Add a check to ensure the delimiter (p_7f) is not at the
          start of the buffer (lbuf) before attempting to isolate
          the tag name.

GitHub Advisory:
https://github.com/vim/vim/security/advisories/GHSA-xcc8-r6c5-hvwv

https://github.com/vim/vim/commit/9b7dfa2948c9e1e5e32a5812812d580c7879f4a0

Co-authored-by: Christian Brabandt <cb@256bit.org>

0 files changed, 0 insertions, 0 deletions