diff --git a/zebra/rtadv.c b/zebra/rtadv.c
index 54c0557775c5..afa3fcfd81a5 100644
--- a/zebra/rtadv.c
+++ b/zebra/rtadv.c
@@ -988,6 +988,10 @@ static int rtadv_make_socket(ns_id_t ns_id)
 	struct icmp6_filter filter;
 	int error;
 
+/* Limit receive buffer size to avoid unbounded growth under abnormal load */
+/* 20MB provides enough headroom for RS/RA bursts while capping memory usage */
+#define RTADV_RCVBUF_SIZE (20 * 1024 * 1024)
+
 	frr_with_privs(&zserv_privs) {
 
 		sock = ns_socket(AF_INET6, SOCK_RAW, IPPROTO_ICMPV6, ns_id);
@@ -1004,6 +1008,9 @@ static int rtadv_make_socket(ns_id_t ns_id)
 		return -1;
 	}
 
+	/* Limit RTADV socket receive buffer */
+	setsockopt_so_recvbuf(sock, RTADV_RCVBUF_SIZE);
+
 	ret = setsockopt_ipv6_pktinfo(sock, 1);
 	if (ret < 0) {
 		zlog_warn("RTADV failure to set Packet Information");