https://bugs.gentoo.org/962891
https://git.gnupg.org/cgi-bin/gitweb.cgi?p=gpgmeqt.git;a=commit;h=86d58c452e0028ea3b59a6ceac7060ece99b4fd2

From 86d58c452e0028ea3b59a6ceac7060ece99b4fd2 Mon Sep 17 00:00:00 2001
From: =?utf8?q?Ingo=20Kl=C3=B6cker?= <dev@ingo-kloecker.de>
Date: Mon, 14 Jul 2025 12:24:09 +0200
Subject: [PATCH] Improve the fix for the DN parser

* src/dn.cpp (parse_dn_part): Set end of hex string to size of string if
no non-hex characters were found. Remove special-casing of remove_prefix
call.
--
---
 src/dn.cpp | 9 ++++-----
 1 file changed, 4 insertions(+), 5 deletions(-)

diff --git a/src/dn.cpp b/src/dn.cpp
index 90632cc..fb64c6e 100644
--- a/src/dn.cpp
+++ b/src/dn.cpp
@@ -215,15 +215,14 @@ static std::pair<std::optional<std::string_view>, std::pair<std::string, std::st
         /* hexstring */
         stringv.remove_prefix(1);
         auto endHex = stringv.find_first_not_of("1234567890abcdefABCDEF"sv);
+        if (endHex == std::string_view::npos) {
+            endHex = stringv.size();
+        }
         auto value = parseHexString(stringv.substr(0, endHex));
         if (!value.has_value()) {
             return {};
         }
-        if (endHex == std::string_view::npos) {
-            stringv = {};
-        } else {
-            stringv.remove_prefix(endHex);
-        }
+        stringv.remove_prefix(endHex);
         dnPair.second = value.value();
     } else if (stringv.front() == '"') {
         stringv.remove_prefix(1);
-- 
2.30.2