diff --git a/application/cmdbabstract.class.inc.php b/application/cmdbabstract.class.inc.php
index f7162bc88..ae07c391c 100644
--- a/application/cmdbabstract.class.inc.php
+++ b/application/cmdbabstract.class.inc.php
@@ -56,8 +56,6 @@ abstract class cmdbAbstractObject extends CMDBObject implements iDisplay
 	protected $m_iFormId; // The ID of the form used to edit the object (when in edition mode !)
 	protected static $iGlobalFormId = 1;
 	protected $aFieldsMap;
-	/** @var array attname => currentvalue Persists changes for {@link DBUpdate} */
-	protected $m_aChanges;
 
 	/**
 	 * If true, bypass IsActionAllowedOnAttribute when writing this object
@@ -3733,8 +3731,6 @@ EOF
 
 	public function DBUpdate()
 	{
-		$this->m_aChanges = $this->ListChanges();
-
 		$res = parent::DBUpdate();
 
 		$this->SetWarningsAsSessionMessages('update');
@@ -3767,8 +3763,6 @@ EOF
 			unset($aUpdateReentrance[$sKey]);
 		}
 
-		$this->m_aChanges = array();
-
 		return $res;
 	}
 
diff --git a/core/dbobject.class.php b/core/dbobject.class.php
index 43c89dbac..2d2e11b17 100644
--- a/core/dbobject.class.php
+++ b/core/dbobject.class.php
@@ -133,6 +133,11 @@ abstract class DBObject implements iDisplay
 	 *   * false => not modified (the same value as the original value was set)
 	 */
 	protected $m_aModifiedAtt = array();
+	/**
+	 * @var array attname => currentvalue Persists changes for {@link DBUpdate}
+	 * @since 2.7.0 N°2293
+	 */
+	protected $m_aChanges;
 	/**
 	 * @var array Set of Synch data related to this object
 	 * <ul>
@@ -3015,6 +3020,8 @@ abstract class DBObject implements iDisplay
 			throw new CoreException("DBUpdate: could not update a newly created object, please call DBInsert instead");
 		}
 
+		$this->m_aChanges = array(); // reset attribute to avoid stack collisions
+
 		$iNbTryRemaining = 3;
 		while ($iNbTryRemaining > 0)
 		{
@@ -3164,6 +3171,8 @@ abstract class DBObject implements iDisplay
 				$this->DBWriteLinks();
 				$this->WriteExternalAttributes();
 
+				$this->m_aChanges = $this->ListChanges(); // N°2293 save changes for use in user callbacks
+
 				$this->AfterUpdate();
 
 				$this->m_bDirty = false;