CVE-2024-45306

Vim is an open source, command line text editor. Patch v9.1.0038 optimized
how the cursor position is calculated and removed a loop, that verified
that the cursor position always points inside a line and does not become
invalid by pointing beyond the end of
a line. Back then we assumed this loop is unnecessary. However, this change
made it possible that the cursor position stays invalid and points beyond
the end of a line, which would eventually cause a heap-buffer-overflow when
trying to access the line pointer at
the specified cursor position. It’s not quite clear yet, what can lead to
this situation that the cursor points to an invalid position. That’s why
patch v9.1.0707 does not include a test case. The only observed impact has
been a program crash. This issue has been addressed in with the patch
v9.1.0707. All users are advised to upgrade.