patch 9.0.2109: [security]: overflow in nv_z_get_count Commit: https://github.com/vim/vim/commit/58f9befca1fa172068effad7f2ea5a9d6a7b0cca Author: Christian Brabandt <cb@256bit.org> Date: Tue Nov 14 21:02:30 2023 +0100 patch 9.0.2109: [security]: overflow in nv_z_get_count Problem: [security]: overflow in nv_z_get_count Solution: break out, if count is too large When getting the count for a normal z command, it may overflow for large counts given. So verify, that we can safely store the result in a long. Signed-off-by: Christian Brabandt <cb@256bit.org>

--- a/src/normal.c
+++ b/src/normal.c
@@ -2562,7 +2562,14 @@ nv_z_get_count(cmdarg_T *cap, int *nchar
 	if (nchar == K_DEL || nchar == K_KDEL)
 	    n /= 10;
 	else if (VIM_ISDIGIT(nchar))
+	{
+	    if (n > LONG_MAX / 10)
+	    {
+		clearopbeep(cap->oap);
+		break;
+	    }
 	    n = n * 10 + (nchar - '0');
+	}
 	else if (nchar == CAR)
 	{
 #ifdef FEAT_GUI