From 7e7629499fdbe88b7327a7db194214840769779f Mon Sep 17 00:00:00 2001
From: Tobias Brunner <tobias@strongswan.org>
Date: Tue, 12 May 2026 16:59:16 +0200
Subject: [PATCH] receiver: Avoid unaligned memory access in COOKIE
 verification

This access could be an issue on platforms with strict alignment
requirements.
---
 src/libcharon/network/receiver.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/libcharon/network/receiver.c b/src/libcharon/network/receiver.c
index 480d1d622..51342ce8c 100644
--- a/src/libcharon/network/receiver.c
+++ b/src/libcharon/network/receiver.c
@@ -281,7 +281,7 @@ static bool check_cookie(private_receiver_t *this, message_t *message)
 		 IKE_HEADER_LENGTH + NOTIFY_PAYLOAD_HEADER_LENGTH +
 		 sizeof(uint32_t) + this->hasher->get_hash_size(this->hasher) ||
 		*(data.ptr + 16) != PLV2_NOTIFY ||
-		*(uint16_t*)(data.ptr + IKE_HEADER_LENGTH + 6) != htons(COOKIE))
+		untoh16(data.ptr + IKE_HEADER_LENGTH + 6) != COOKIE)
 	{
 		/* no cookie found */
 		return FALSE;