sys-libs/ncurses/files/ncurses-6.2-fix-cve-2021-39537.patch

diff --git a/ncurses/tinfo/captoinfo.c b/ncurses/tinfo/captoinfo.c
index 8b3b83d1..9362105a 100644
--- a/ncurses/tinfo/captoinfo.c
+++ b/ncurses/tinfo/captoinfo.c
@@ -216,12 +216,15 @@ cvtchar(register const char *sp)
 	}
 	break;
     case '^':
+	len = 2;
 	c = UChar(*++sp);
-	if (c == '?')
+	if (c == '?') {
 	    c = 127;
-	else
+	} else if (c == '\0') {
+	    len = 1;
+	} else {
 	    c &= 0x1f;
-	len = 2;
+	}
 	break;
     default:
 	c = UChar(*sp);