--- a/src/cmv_message_format.h
+++ b/src/cmv_message_format.h
@@ -308,7 +308,7 @@ typedef struct cmv_std_message_header_s
    unsigned short index;
    /** CMV length */
    unsigned short length;
-} CMV_STD_MESSAGE_HEADER_T;
+} __attribute__((packed)) CMV_STD_MESSAGE_HEADER_T;
 
 /**
    CMV payload paramaters (8, 16, 32 Bit)
@@ -318,7 +318,7 @@ typedef union cmv_std_message_payload_s
    unsigned char  params_8Bit[CMV_USED_PAYLOAD_8BIT_SIZE];
    unsigned short params_16Bit[CMV_USED_PAYLOAD_16BIT_SIZE];
    unsigned int   params_32Bit[CMV_USED_PAYLOAD_32BIT_SIZE];
-} CMV_STD_MESSAGE_PAYLOAD_T;
+} __attribute__((packed)) CMV_STD_MESSAGE_PAYLOAD_T;
 
 /**
    CMV Standard message.
@@ -327,7 +327,7 @@ typedef struct cmv_std_message_s
 {
    CMV_STD_MESSAGE_HEADER_T   header;
    CMV_STD_MESSAGE_PAYLOAD_T  payload;
-} CMV_STD_MESSAGE_T;
+} __attribute__((packed)) CMV_STD_MESSAGE_T;
 
 
 /* ============================================================================
@@ -341,7 +341,7 @@ typedef struct cmv_message_modem_rdy_s
 {
    CMV_STD_MESSAGE_HEADER_T   header;
    CMV_STD_MESSAGE_PAYLOAD_T  modemRdyParams;
-} CMV_MESSAGE_MODEM_RDY_T;
+} __attribute__((packed)) CMV_MESSAGE_MODEM_RDY_T;
 
 
 /* ============================================================================
@@ -358,7 +358,7 @@ typedef struct cmv_message_modem_rdy_s
 typedef struct cmv_message_cs_static_params_s
 {
    unsigned short pageIdx[MEI_CMV_CODESWAP_MAX_PAGES];
-} CMV_MESSAGE_CS_STATIC_PARAMS_T;
+} __attribute__((packed)) CMV_MESSAGE_CS_STATIC_PARAMS_T;
 
 
 typedef struct cmv_dyn_codeswap_page_info_s
@@ -366,7 +366,7 @@ typedef struct cmv_dyn_codeswap_page_inf
    unsigned short pageIdx;
    unsigned short h_destAddr;
    unsigned short l_destAddr;
-} CMV_DYN_CODESWAP_PAGE_INFO_T;
+} __attribute__((packed)) CMV_DYN_CODESWAP_PAGE_INFO_T;
 
 /**
    CMV codeswap message payload (dynamic).
@@ -374,7 +374,7 @@ typedef struct cmv_dyn_codeswap_page_inf
 typedef struct cmv_message_cs_dyn_params_s
 {
    CMV_DYN_CODESWAP_PAGE_INFO_T pageInfo[MEI_CMV_CODESWAP_MAX_PAGES];
-} CMV_MESSAGE_CS_DYN_PARAMS_T;
+} __attribute__((packed)) CMV_MESSAGE_CS_DYN_PARAMS_T;
 
 
 /**
@@ -388,7 +388,7 @@ typedef struct cmv_message_cs_s
       CMV_MESSAGE_CS_STATIC_PARAMS_T   csStaticParams;
       CMV_MESSAGE_CS_DYN_PARAMS_T      csDynParams;
    } params;
-} CMV_MESSAGE_CS_T;
+} __attribute__((packed)) CMV_MESSAGE_CS_T;
 
 /* ============================================================================
    CMV Fast Read request message definitions
@@ -406,7 +406,7 @@ typedef struct cmv_fast_read_params_s
    unsigned short addrMSW;
    unsigned short addrLSW;
    unsigned short size_16bit;
-} CMV_FAST_READ_PARAMS_T;
+} __attribute__((packed)) CMV_FAST_READ_PARAMS_T;
 
 /**
    CMV fast read message payload.
@@ -414,7 +414,7 @@ typedef struct cmv_fast_read_params_s
 typedef struct cmv_message_fast_rd_params_s
 {
    unsigned short fastRdpage[MEI_CMV_FAST_READ_MAX_PAGES];
-} CMV_MESSAGE_FAST_RD_PARAMS_T;
+} __attribute__((packed)) CMV_MESSAGE_FAST_RD_PARAMS_T;
 
 /**
    CMV codeswap message.
@@ -423,7 +423,7 @@ typedef struct cmv_message_fast_rd_s
 {
    CMV_STD_MESSAGE_HEADER_T      header;
    CMV_MESSAGE_FAST_RD_PARAMS_T  fastRdParams;
-} CMV_MESSAGE_FAST_RD_T;
+} __attribute__((packed)) CMV_MESSAGE_FAST_RD_T;
 
 /**
    CMV messages
@@ -435,7 +435,7 @@ typedef union cmv_message_all_s
    CMV_MESSAGE_CS_T        codeSwap;
    CMV_MESSAGE_FAST_RD_T   fastRd;
    unsigned short          rawMsg[CMV_HEADER_16BIT_SIZE + CMV_USED_PAYLOAD_16BIT_SIZE];
-} CMV_MESSAGE_ALL_T;
+} __attribute__((packed)) CMV_MESSAGE_ALL_T;
 
 
 
--- a/src/drv_mei_cpe_mailbox.h
+++ b/src/drv_mei_cpe_mailbox.h
@@ -202,7 +202,7 @@ typedef union MEI_cmv_mailbox_s
    CMV_MESSAGE_CS_T        codeSwap;
    /** CMV Fast Read message */
    CMV_MESSAGE_FAST_RD_T   fastRd;
-} MEI_CMV_MAILBOX_T;
+} __attribute__((packed)) MEI_CMV_MAILBOX_T;
 
 
 /**
@@ -211,7 +211,7 @@ typedef union MEI_cmv_mailbox_s
 typedef struct MEI_mei_mailbox_raw_s
 {
    IFX_uint16_t   rawMsg[CMV_HEADER_16BIT_SIZE + CMV_USED_PAYLOAD_16BIT_SIZE];
-} MEI_MEI_MAILBOX_RAW_T;
+} __attribute__((packed)) MEI_MEI_MAILBOX_RAW_T;
 
 
 /**
@@ -223,7 +223,7 @@ typedef union MEI_mei_mailbox_s
    MEI_MEI_MAILBOX_RAW_T mbRaw;
    /** CMV message type */
    MEI_CMV_MAILBOX_T     mbCmv;
-} MEI_MEI_MAILBOX_T;
+} __attribute__((packed)) MEI_MEI_MAILBOX_T;
 
 
 #ifdef __cplusplus
--- a/src/drv_mei_cpe_msg_process.c
+++ b/src/drv_mei_cpe_msg_process.c
@@ -2215,7 +2215,7 @@ MEI_STATIC IFX_int32_t MEI_ModemNfcRead(
          Return IFX/modem message
          - index and length fields becomes part of the appl. payload
       */
-      pSource = (unsigned char *)&pMailbox->mbCmv.cmv.header.index;
+      pSource = (unsigned char *)&pMailbox->mbCmv.cmv + offsetof(CMV_STD_MESSAGE_T, header.index);
 
       /* size field contains number of 16 bit payload elements of the message */
       paylSize_byte = (CMV_MSGHDR_PAYLOAD_SIZE_GET(pMailbox->mbCmv.cmv)) << CMV_MSG_BIT_SIZE_16BIT;
@@ -3551,7 +3551,7 @@ IFX_int32_t MEI_IoctlCmdMsgWrite(
    */
    cmvMbSize = CMV_HEADER_8BIT_SIZE +
                   pUserMsg->paylSize_byte - (sizeof(IFX_uint16_t) * 2);
-   pDestPtr = (unsigned char *)&pMailbox->mbCmv.cmv.header.index;
+   pDestPtr = (unsigned char *)&pMailbox->mbCmv.cmv + offsetof(CMV_STD_MESSAGE_T, header.index);
 
    if ( cmvMbSize > (int)(sizeof(MEI_CMV_MAILBOX_T)) )
    {
@@ -3665,7 +3665,7 @@ IFX_int32_t MEI_IoctlAckMsgRead(
          Return IFX/modem message
          - index and length fields becomes part of the appl. payload
       */
-      pSource = (unsigned char *)&pMailbox->mbCmv.cmv.header.index;
+      pSource = (unsigned char *)&pMailbox->mbCmv.cmv + offsetof(CMV_STD_MESSAGE_T, header.index);
 
       /* size field contains number of 16 bit payload elements of the message */
       paylSize_byte = (CMV_MSGHDR_PAYLOAD_SIZE_GET(pMailbox->mbCmv.cmv)) << CMV_MSG_BIT_SIZE_16BIT;
--- a/src/drv_mei_cpe_msg_process_ar9.c
+++ b/src/drv_mei_cpe_msg_process_ar9.c
@@ -1385,7 +1385,7 @@ MEI_STATIC IFX_int32_t MEI_ModemNfcRead(
          Return IFX/modem message
          - index and length fields becomes part of the appl. payload
       */
-      pSource = (unsigned char *)&pMailbox->mbCmv.cmv.header.index;
+      pSource = (unsigned char *)&pMailbox->mbCmv.cmv + offsetof(CMV_STD_MESSAGE_T, header.index);
 
       /* size field contains number of 16 bit payload elements of the message */
       paylSize_byte = (CMV_MSGHDR_PAYLOAD_SIZE_GET(pMailbox->mbCmv.cmv)) << CMV_MSG_BIT_SIZE_16BIT;