From d39d261b7eba3c4ee91e7387713a9e42dde8112f Mon Sep 17 00:00:00 2001
From: Niels Dossche <7771979+nielsdos@users.noreply.github.com>
Date: Sat, 31 May 2025 15:21:44 +0200
Subject: [PATCH] Fix memory leak in lookup_loc_range()

Closes GH-18723.
---
 NEWS                             | 1 +
 ext/intl/locale/locale_methods.c | 1 +
 2 files changed, 2 insertions(+)

diff --git a/NEWS b/NEWS
index 02b90ff3dc7..40806102246 100644
--- a/NEWS
+++ b/NEWS
@@ -17,6 +17,7 @@ PHP                                                                        NEWS
 
 - Intl:
   . Fix memory leak in intl_datetime_decompose() on failure. (nielsdos)
+  . Fix memory leak in locale lookup on failure. (nielsdos)
 
 - Phar:
   . Add missing filter cleanups on phar failure. (nielsdos)
diff --git a/ext/intl/locale/locale_methods.c b/ext/intl/locale/locale_methods.c
index f810a61b6be..44ae9a901a5 100644
--- a/ext/intl/locale/locale_methods.c
+++ b/ext/intl/locale/locale_methods.c
@@ -1499,6 +1499,7 @@ static zend_string* lookup_loc_range(const char* loc_range, HashTable* hash_arr,
 		zend_string_release_ex(can_loc_range, 0);
 	}
 	if(result == 0) {
+		efree(cur_loc_range);
 		intl_error_set(NULL, U_ILLEGAL_ARGUMENT_ERROR, "lookup_loc_range: unable to canonicalize lang_tag" , 0);
 		LOOKUP_CLEAN_RETURN(NULL);
 	}