diff --git a/library/rsa.c b/library/rsa.c
index f4add9173f..b250e1d491 100644
--- a/library/rsa.c
+++ b/library/rsa.c
@@ -109,6 +109,10 @@ int mbedtls_rsa_parse_key(mbedtls_rsa_context *rsa, const unsigned char *key, si
 
     end = p + len;
 
+    if (end > (key + keylen)) {
+        return MBEDTLS_ERR_ASN1_LENGTH_MISMATCH;
+    }
+
     if ((ret = mbedtls_asn1_get_int(&p, end, &version)) != 0) {
         return ret;
     }
@@ -239,7 +243,9 @@ int mbedtls_rsa_parse_pubkey(mbedtls_rsa_context *rsa, const unsigned char *key,
         return ret;
     }
 
-    if (p + len != end) {
+    end = p + len;
+
+    if (end > (key + keylen)) {
         return MBEDTLS_ERR_ASN1_LENGTH_MISMATCH;
     }
 
diff --git a/tests/suites/test_suite_rsa.data b/tests/suites/test_suite_rsa.data
index b404f00d26..b89d1583c3 100644
--- a/tests/suites/test_suite_rsa.data
+++ b/tests/suites/test_suite_rsa.data
@@ -707,7 +707,7 @@ RSA parse public key - public exponent 0
 rsa_parse_pkcs1_key:1:"308189028181009f091e6968b474f76f0e9c237c1d895996ae704b4f6d706acec8d2daac6209bf524aa3f658d0283adba1077f6cbe92e425dcde52290b239cade91be86c88425434986806e85734e159768f3dfea932baaa9409d25bace8ee9dce0cdde0903207299de575ae60feccf0daf82334ab83638539b0da74072f253acea8afc8e66bb70203000000":MBEDTLS_ERR_RSA_BAD_INPUT_DATA
 
 RSA parse public key - wrong sequence length
-rsa_parse_pkcs1_key:1:"308188028181009f091e6968b474f76f0e9c237c1d895996ae704b4f6d706acec8d2daac6209bf524aa3f658d0283adba1077f6cbe92e425dcde52290b239cade91be86c88425434986806e85734e159768f3dfea932baaa9409d25bace8ee9dce0cdde0903207299de575ae60feccf0daf82334ab83638539b0da74072f253acea8afc8e66bb70203010001":MBEDTLS_ERR_ASN1_LENGTH_MISMATCH
+rsa_parse_pkcs1_key:1:"308188028181009f091e6968b474f76f0e9c237c1d895996ae704b4f6d706acec8d2daac6209bf524aa3f658d0283adba1077f6cbe92e425dcde52290b239cade91be86c88425434986806e85734e159768f3dfea932baaa9409d25bace8ee9dce0cdde0903207299de575ae60feccf0daf82334ab83638539b0da74072f253acea8afc8e66bb70203010001":MBEDTLS_ERR_ASN1_OUT_OF_DATA
 
 RSA parse public key - wrong modulus length
 rsa_parse_pkcs1_key:1:"308189028180009f091e6968b474f76f0e9c237c1d895996ae704b4f6d706acec8d2daac6209bf524aa3f658d0283adba1077f6cbe92e425dcde52290b239cade91be86c88425434986806e85734e159768f3dfea932baaa9409d25bace8ee9dce0cdde0903207299de575ae60feccf0daf82334ab83638539b0da74072f253acea8afc8e66bb70203010001":MBEDTLS_ERR_ASN1_UNEXPECTED_TAG
diff --git a/tests/suites/test_suite_x509parse.data b/tests/suites/test_suite_x509parse.data
index 261c220ee6..b9ae20c56f 100644
--- a/tests/suites/test_suite_x509parse.data
+++ b/tests/suites/test_suite_x509parse.data
@@ -1774,7 +1774,7 @@ x509parse_crt:"307d3068a0030201008204deadbeef300d06092a864886f70d01010b0500300c3
 
 X509 CRT ASN1 (TBS, inv SubPubKeyInfo, inv internal bitstring length)
 depends_on:MBEDTLS_RSA_C:MBEDTLS_MD_CAN_SHA256
-x509parse_crt:"308180306ba0030201008204deadbeef300d06092a864886f70d01010b0500300c310a30080600130454657374301c170c303930313031303030303030170c303931323331323335393539300c310a300806001304546573743015300d06092A864886F70D0101010500030400300000300d06092a864886f70d01010b0500030200ff":"":MBEDTLS_ERR_PK_INVALID_PUBKEY + MBEDTLS_ERR_ASN1_LENGTH_MISMATCH
+x509parse_crt:"308180306ba0030201008204deadbeef300d06092a864886f70d01010b0500300c310a30080600130454657374301c170c303930313031303030303030170c303931323331323335393539300c310a300806001304546573743015300d06092A864886F70D0101010500030400300000300d06092a864886f70d01010b0500030200ff":"":MBEDTLS_ERR_PK_INVALID_PUBKEY + MBEDTLS_ERR_ASN1_OUT_OF_DATA
 
 X509 CRT ASN1 (TBS, inv SubPubKeyInfo, inv internal bitstring tag)
 depends_on:MBEDTLS_RSA_C:MBEDTLS_MD_CAN_SHA256