diff --git a/fs/erofs/zmap.c b/fs/erofs/zmap.c
index a7da7ed4bda7..046a2515e309 100644
--- a/fs/erofs/zmap.c
+++ b/fs/erofs/zmap.c
@@ -191,6 +191,10 @@ static int legacy_load_cluster_from_disk(struct z_erofs_maprecorder *m,
 	case Z_EROFS_VLE_CLUSTER_TYPE_PLAIN:
 	case Z_EROFS_VLE_CLUSTER_TYPE_HEAD:
 		m->clusterofs = le16_to_cpu(di->di_clusterofs);
+		if (m->clusterofs >= 1 << vi->z_logical_clusterbits) {
+			DBG_BUGON(1);
+			return -EFSCORRUPTED;
+		}
 		m->pblk = le32_to_cpu(di->di_u.blkaddr);
 		break;
 	default: