skiboot v6.7.3 release notes

Signed-off-by: Vasant Hegde <hegdevasant@linux.vnet.ibm.com>

Author: Vasant Hegde

doc/release-notes/skiboot-6.7.3.rst

@@ -0,0 +1,29 @@
+.. _skiboot-6.7.3:
+
+==============
+skiboot-6.7.3
+==============
+
+skiboot 6.7.3 was released on Thursday July 22, 2021. It replaces
+:ref:`skiboot-6.7.2` as the current stable release in the 6.7.x series.
+
+It is recommended that 6.7.3 be used instead of 6.7.2 version due to the
+bug fixes it contains.
+
+Bug fixes included in this release are:
+
+- pkcs7: pkcs7_get_content_info_type should reset *p on error
+
+- secvar/backend: fix a memory leak in get_pkcs7
+
+- secvar/backend: fix an integer underflow bug
+
+- secvar/backend: Don't overread data in auth descriptor
+
+- secvar: return error if verify_signature runs out of ESLs
+
+- secvar: return error if validate_esl has extra data
+
+- secvar: Make `validate_esl_list` iterate through esl chain
+
+- secvar: ensure ESL buf size is at least what ESL header expects