diff -up openssl-1.0.1c/crypto/evp/e_aes.c.init-str openssl-1.0.1c/crypto/evp/e_aes.c
--- openssl-1.0.1c/crypto/evp/e_aes.c.init-str	2012-09-06 17:20:45.000000000 +0200
+++ openssl-1.0.1c/crypto/evp/e_aes.c	2012-09-06 17:18:30.000000000 +0200
@@ -1216,6 +1216,7 @@ static int aes_ccm_init_key(EVP_CIPHER_C
 			vpaes_set_encrypt_key(key, ctx->key_len*8, &cctx->ks);
 			CRYPTO_ccm128_init(&cctx->ccm, cctx->M, cctx->L,
 					&cctx->ks, (block128_f)vpaes_encrypt);
+			cctx->str = NULL;
 			cctx->key_set = 1;
 			break;
 			}