diff --git a/share/man/man4/udp.4 b/share/man/man4/udp.4
--- a/share/man/man4/udp.4
+++ b/share/man/man4/udp.4
@@ -25,7 +25,7 @@
 .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 .\" SUCH DAMAGE.
 .\"
-.Dd August 1, 2022
+.Dd January 20, 2025
 .Dt UDP 4
 .Os
 .Sh NAME
@@ -107,6 +107,19 @@
 .Tn UDP_ENCAP_ESPINUDP
 from RFC 3948, defined in
 .In netinet/udp.h .
+.Sh FIB support
+UDP sockets are FIB-aware.
+They inherit the FIB of the process which created the socket.
+By default, a UDP socket bound to an address can receive datagrams originating
+from any FIB.
+If the
+.Va net.inet.udp.bind_all_fibs
+tunable is set to 0, all UDP sockets will receive only datagrams originating
+from the same FIB as the socket.
+In this mode, multiple sockets can be bound to the same address, so long as
+each socket belongs to a different FIB, similar to the behavior of the
+.Dv SO_REUSEPORT
+option.
 .Sh MIB (sysctl) Variables
 The
 .Nm
diff --git a/sys/netinet/udp_usrreq.c b/sys/netinet/udp_usrreq.c
--- a/sys/netinet/udp_usrreq.c
+++ b/sys/netinet/udp_usrreq.c
@@ -105,6 +105,11 @@
  * Per RFC 3828, July, 2004.
  */
 
+VNET_DEFINE(int, udp_bind_all_fibs) = 1;
+SYSCTL_INT(_net_inet_udp, OID_AUTO, bind_all_fibs, CTLFLAG_VNET | CTLFLAG_RDTUN,
+    &VNET_NAME(udp_bind_all_fibs), 0,
+    "Bound sockets receive traffic from all FIBs");
+
 /*
  * BSD 4.2 defaulted the udp checksum to be off.  Turning off udp checksums
  * removes the only data integrity mechanism for packets and malformed
@@ -453,7 +458,7 @@
 	struct sockaddr_in udp_in[2];
 	struct mbuf *m;
 	struct m_tag *fwd_tag;
-	int cscov_partial, iphlen;
+	int cscov_partial, iphlen, lookupflags;
 
 	m = *mp;
 	iphlen = *offp;
@@ -575,7 +580,11 @@
 
 	/*
 	 * Locate pcb for datagram.
-	 *
+	 */
+	lookupflags = INPLOOKUP_RLOCKPCB |
+	    (V_udp_bind_all_fibs ? 0 : INPLOOKUP_FIB);
+
+	/*
 	 * Grab info from PACKET_TAG_IPFORWARD tag prepended to the chain.
 	 */
 	if ((m->m_flags & M_IP_NEXTHOP) &&
@@ -589,7 +598,7 @@
 		 * Already got one like this?
 		 */
 		inp = in_pcblookup_mbuf(pcbinfo, ip->ip_src, uh->uh_sport,
-		    ip->ip_dst, uh->uh_dport, INPLOOKUP_RLOCKPCB, ifp, m);
+		    ip->ip_dst, uh->uh_dport, lookupflags, ifp, m);
 		if (!inp) {
 			/*
 			 * It's new.  Try to find the ambushing socket.
@@ -599,8 +608,8 @@
 			inp = in_pcblookup(pcbinfo, ip->ip_src,
 			    uh->uh_sport, next_hop->sin_addr,
 			    next_hop->sin_port ? htons(next_hop->sin_port) :
-			    uh->uh_dport, INPLOOKUP_WILDCARD |
-			    INPLOOKUP_RLOCKPCB, ifp);
+			    uh->uh_dport, INPLOOKUP_WILDCARD | lookupflags,
+			    ifp);
 		}
 		/* Remove the tag from the packet. We don't need it anymore. */
 		m_tag_delete(m, fwd_tag);
@@ -608,7 +617,7 @@
 	} else
 		inp = in_pcblookup_mbuf(pcbinfo, ip->ip_src, uh->uh_sport,
 		    ip->ip_dst, uh->uh_dport, INPLOOKUP_WILDCARD |
-		    INPLOOKUP_RLOCKPCB, ifp, m);
+		    lookupflags, ifp, m);
 	if (inp == NULL) {
 		if (V_udp_log_in_vain) {
 			char src[INET_ADDRSTRLEN];
@@ -1242,8 +1251,8 @@
 			inp->inp_vflag &= ~INP_IPV6;
 		}
 		INP_HASH_WLOCK(pcbinfo);
-		error = in_pcbbind_setup(inp, &src, &laddr.s_addr, &lport, 0,
-		    td->td_ucred);
+		error = in_pcbbind_setup(inp, &src, &laddr.s_addr, &lport,
+		    V_udp_bind_all_fibs ? 0 : INPBIND_FIB, td->td_ucred);
 		INP_HASH_WUNLOCK(pcbinfo);
 		if ((flags & PRUS_IPV6) != 0)
 			inp->inp_vflag = vflagsav;
@@ -1592,7 +1601,8 @@
 
 	INP_WLOCK(inp);
 	INP_HASH_WLOCK(pcbinfo);
-	error = in_pcbbind(inp, sinp, 0, td->td_ucred);
+	error = in_pcbbind(inp, sinp, V_udp_bind_all_fibs ? 0 : INPBIND_FIB,
+	    td->td_ucred);
 	INP_HASH_WUNLOCK(pcbinfo);
 	INP_WUNLOCK(inp);
 	return (error);
diff --git a/sys/netinet/udp_var.h b/sys/netinet/udp_var.h
--- a/sys/netinet/udp_var.h
+++ b/sys/netinet/udp_var.h
@@ -155,13 +155,15 @@
 
 extern u_long			udp_sendspace;
 extern u_long			udp_recvspace;
-VNET_DECLARE(int, udp_cksum);
+VNET_DECLARE(int, udp_bind_all_fibs);
 VNET_DECLARE(int, udp_blackhole);
 VNET_DECLARE(bool, udp_blackhole_local);
+VNET_DECLARE(int, udp_cksum);
 VNET_DECLARE(int, udp_log_in_vain);
-#define	V_udp_cksum		VNET(udp_cksum)
+#define	V_udp_bind_all_fibs	VNET(udp_bind_all_fibs)
 #define	V_udp_blackhole		VNET(udp_blackhole)
 #define	V_udp_blackhole_local	VNET(udp_blackhole_local)
+#define	V_udp_cksum		VNET(udp_cksum)
 #define	V_udp_log_in_vain	VNET(udp_log_in_vain)
 
 VNET_DECLARE(int, zero_checksum_port);
diff --git a/sys/netinet6/udp6_usrreq.c b/sys/netinet6/udp6_usrreq.c
--- a/sys/netinet6/udp6_usrreq.c
+++ b/sys/netinet6/udp6_usrreq.c
@@ -357,6 +357,7 @@
 	int off = *offp;
 	int cscov_partial;
 	int plen, ulen;
+	int lookupflags;
 	struct sockaddr_in6 fromsa[2];
 	struct m_tag *fwd_tag;
 	uint16_t uh_sum;
@@ -454,6 +455,8 @@
 	/*
 	 * Locate pcb for datagram.
 	 */
+	lookupflags = INPLOOKUP_RLOCKPCB |
+	    (V_udp_bind_all_fibs ? 0 : INPLOOKUP_FIB);
 
 	/*
 	 * Grab info from PACKET_TAG_IPFORWARD tag prepended to the chain.
@@ -470,7 +473,7 @@
 		 */
 		inp = in6_pcblookup_mbuf(pcbinfo, &ip6->ip6_src,
 		    uh->uh_sport, &ip6->ip6_dst, uh->uh_dport,
-		    INPLOOKUP_RLOCKPCB, m->m_pkthdr.rcvif, m);
+		    lookupflags, m->m_pkthdr.rcvif, m);
 		if (!inp) {
 			/*
 			 * It's new.  Try to find the ambushing socket.
@@ -480,8 +483,8 @@
 			inp = in6_pcblookup(pcbinfo, &ip6->ip6_src,
 			    uh->uh_sport, &next_hop6->sin6_addr,
 			    next_hop6->sin6_port ? htons(next_hop6->sin6_port) :
-			    uh->uh_dport, INPLOOKUP_WILDCARD |
-			    INPLOOKUP_RLOCKPCB, m->m_pkthdr.rcvif);
+			    uh->uh_dport, INPLOOKUP_WILDCARD | lookupflags,
+			    m->m_pkthdr.rcvif);
 		}
 		/* Remove the tag from the packet. We don't need it anymore. */
 		m_tag_delete(m, fwd_tag);
@@ -489,7 +492,7 @@
 	} else
 		inp = in6_pcblookup_mbuf(pcbinfo, &ip6->ip6_src,
 		    uh->uh_sport, &ip6->ip6_dst, uh->uh_dport,
-		    INPLOOKUP_WILDCARD | INPLOOKUP_RLOCKPCB,
+		    INPLOOKUP_WILDCARD | lookupflags,
 		    m->m_pkthdr.rcvif, m);
 	if (inp == NULL) {
 		if (V_udp_log_in_vain) {
@@ -1058,13 +1061,16 @@
 			in6_sin6_2_sin(&sin, sin6_p);
 			inp->inp_vflag |= INP_IPV4;
 			inp->inp_vflag &= ~INP_IPV6;
-			error = in_pcbbind(inp, &sin, 0, td->td_ucred);
+			error = in_pcbbind(inp, &sin,
+			    V_udp_bind_all_fibs ? 0 : INPBIND_FIB,
+			    td->td_ucred);
 			goto out;
 		}
 #endif
 	}
 
-	error = in6_pcbbind(inp, sin6_p, 0, td->td_ucred);
+	error = in6_pcbbind(inp, sin6_p, V_udp_bind_all_fibs ? 0 : INPBIND_FIB,
+	    td->td_ucred);
 #ifdef INET
 out:
 #endif