From: WanBingjiang <wanbingjiang@webray.com.cn>
Date: Mon, 2 Feb 2026 06:55:11 +0000 (+0800)
Subject: hexdump: fixes Heap-buffer-overflow in rewrite_rules
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=dcc5161240fe3b5c993297880432e150ff124f3b;p=thirdparty%2Futil-linux.git

hexdump: fixes Heap-buffer-overflow in rewrite_rules
---

diff --git a/text-utils/hexdump-parse.c b/text-utils/hexdump-parse.c
index efc39c3b3..9363b957d 100644
--- a/text-utils/hexdump-parse.c
+++ b/text-utils/hexdump-parse.c
@@ -358,14 +358,15 @@ isint:				cs[3] = '\0';
 						FALLTHROUGH;
 					case 'a':
 						pr->flags = F_ADDRESS;
-						++p2;
-						if (first_letter(p1 + 2, "dox")) {
+						if (p1[2] && first_letter(p1 + 2, "dox")) {
+							++p2;
 							cs[0] = 'l';
 							cs[1] = 'l';
 							cs[2] = p1[2];
 							cs[3] = '\0';
 						} else {
-							p1[3] = '\0';
+							if (p1[2])
+								p1[3] = '\0';
 							badconv(p1);
 						}
 						break;