Headline
CVE-2022-3234: patch 9.0.0483: illegal memory access when replacing in virtualedit mode · vim/vim@c249913
Heap-based Buffer Overflow in GitHub repository vim/vim prior to 9.0.0483.
@@ -1173,6 +1173,8 @@ op_replace(oparg_T *oap, int c)
while (LTOREQ_POS(curwin->w_cursor, oap->end)) { int done = FALSE;
n = gchar_cursor(); if (n != NUL) { @@ -1186,6 +1188,7 @@ op_replace(oparg_T *oap, int c) if (curwin->w_cursor.lnum == oap->end.lnum) oap->end.col += new_byte_len - old_byte_len; replace_character©; done = TRUE; } else { @@ -1204,10 +1207,15 @@ op_replace(oparg_T *oap, int c) if (curwin->w_cursor.lnum == oap->end.lnum) getvpos(&oap->end, end_vcol); } PBYTE(curwin->w_cursor, c); // with “coladd” set may move to just after a TAB if (gchar_cursor() != NUL) { PBYTE(curwin->w_cursor, c); done = TRUE; } } } else if (virtual_op && curwin->w_cursor.lnum == oap->end.lnum) if (!done && virtual_op && curwin->w_cursor.lnum == oap->end.lnum) { int virtcols = oap->end.coladd;
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