From 43c83dc99ea38da2801ae54e28bdc272d47c27ca Mon Sep 17 00:00:00 2001
From: Ilia Alshanetsky <ilia@ilia.ws>
Date: Thu, 29 Oct 2026 10:03:04 -0400
Subject: [PATCH] ext/standard: Free Windows DNS query results

Successful checkdnsrr() and dns_check_record() calls retain their native DNS
record lists. Release the list before returning.
---
 NEWS                     | 2 ++
 ext/standard/dns_win32.c | 2 ++
 2 files changed, 4 insertions(+)

diff --git a/NEWS b/NEWS
index 9e93da5c8d88..4156a9c46047 100644
--- a/NEWS
+++ b/NEWS
@@ -230,6 +230,8 @@ PHP                                                                        NEWS
     properties). (Lazizbek Ergashev)
 
 - Standard:
+  . Fixed memory leaks in checkdnsrr() and dns_check_record() on Windows.
+    (Ilia Alshanetsky)
   . Fixed bug GH-24308 (Request shutdown calls closelog() even when syslog
     was not opened by PHP). (lazerg)
   . Fixed bug GH-24399 (usleep() and time_nanosleep() ignore queued APCs on
diff --git a/ext/standard/dns_win32.c b/ext/standard/dns_win32.c
index 4eb4b0e6e559..96a5e8562511 100644
--- a/ext/standard/dns_win32.c
+++ b/ext/standard/dns_win32.c
@@ -137,6 +137,8 @@ PHP_FUNCTION(dns_check_record)
 		RETURN_FALSE;
 	}
 
+	DnsRecordListFree(pResult, DnsFreeRecordListDeep);
+
 	RETURN_TRUE;
 }
 /* }}} */