diff --git a/option/usbip.go b/option/usbip.go
index e2a7be199..1af98342d 100644
--- a/option/usbip.go
+++ b/option/usbip.go
@@ -39,13 +39,9 @@ func (h *USBIPHexUint16) UnmarshalJSON(data []byte) error {
 		*h = 0
 		return nil
 	}
-	parsed, err := strconv.ParseUint(asString, 0, 16)
+	asString = strings.TrimPrefix(strings.TrimPrefix(asString, "0x"), "0X")
+	parsed, err := strconv.ParseUint(asString, 16, 16)
 	if err != nil {
-		// Allow bare hex without 0x prefix.
-		if parsed2, err2 := strconv.ParseUint(asString, 16, 16); err2 == nil {
-			*h = USBIPHexUint16(parsed2)
-			return nil
-		}
 		return E.Cause(err, "parse usb id ", asString)
 	}
 	*h = USBIPHexUint16(parsed)
diff --git a/service/usbip/client_linux.go b/service/usbip/client_linux.go
index f83f92ea8..0318ef1bb 100644
--- a/service/usbip/client_linux.go
+++ b/service/usbip/client_linux.go
@@ -312,12 +312,7 @@ func (c *ClientService) attemptAttach(busid string) (int, error) {
 	if err != nil {
 		return -1, E.Cause(err, "dial ", c.serverAddr)
 	}
-	success := false
-	defer func() {
-		if !success {
-			conn.Close()
-		}
-	}()
+	defer conn.Close()
 	if err := WriteOpReqImport(conn, busid); err != nil {
 		return -1, E.Cause(err, "write OP_REQ_IMPORT")
 	}
@@ -353,7 +348,6 @@ func (c *ClientService) attemptAttach(busid string) (int, error) {
 	if err := vhciAttach(port, file.Fd(), info.DevID(), info.Speed); err != nil {
 		return -1, E.Cause(err, "vhci attach")
 	}
-	success = true
 	return port, nil
 }
 
diff --git a/service/usbip/server_linux.go b/service/usbip/server_linux.go
index db25280a8..b996a2a4b 100644
--- a/service/usbip/server_linux.go
+++ b/service/usbip/server_linux.go
@@ -6,6 +6,7 @@ import (
 	"context"
 	"net"
 	"sync"
+	"time"
 
 	"github.com/sagernet/sing-box/adapter"
 	boxService "github.com/sagernet/sing-box/adapter/service"
@@ -113,6 +114,12 @@ func (s *ServerService) bindExports() error {
 				matched++
 				continue
 			}
+			if devices[i].DeviceClass == 0x09 {
+				seen[devices[i].BusID] = true
+				matched++
+				s.logger.Warn("skip hub device ", devices[i].BusID, " matched by ", describeMatch(m))
+				continue
+			}
 			if err := s.bindOne(&devices[i]); err != nil {
 				s.logger.Warn("bind ", devices[i].BusID, ": ", err)
 				continue
@@ -219,6 +226,14 @@ func (s *ServerService) acceptLoop(ln net.Listener) {
 			if E.IsClosed(err) {
 				return
 			}
+			//nolint:staticcheck
+			if netError, isNetError := err.(net.Error); isNetError && netError.Temporary() {
+				s.logger.Error("accept: ", err)
+				if !sleepCtx(s.ctx, 200*time.Millisecond) {
+					return
+				}
+				continue
+			}
 			s.logger.Error("accept: ", err)
 			return
 		}