8.15.4 Release notes

docs/release-notes.asciidoc

@@ -3,6 +3,7 @@
 
 This section summarizes the changes in each release.
 
+* <<release-notes-8.15.4, {elastic-sec} version 8.15.4>>
 * <<release-notes-8.15.3, {elastic-sec} version 8.15.3>>
 * <<release-notes-8.15.2, {elastic-sec} version 8.15.2>>
 * <<release-notes-8.15.1, {elastic-sec} version 8.15.1>>

docs/release-notes/8.15.asciidoc

@@ -1,6 +1,43 @@
 [[release-notes-header-8.15.0]]
 == 8.15
 
+[discrete]
+[[release-notes-8.15.4]]
+=== 8.15.4
+
+[discrete]
+[[known-issue-8.15.4]]
+==== Known issues
+
+// tag::known-issue-189676[]
+[discrete]
+.Tags appear in Elastic AI Assistant's responses
+[%collapsible]
+====
+*Details* +
+On August 1, 2024, it was discovered that Elastic AI Assistant's responses when using Bedrock Sonnet 3.5 may include `<antThinking>` tags, for example `<search_quality_reflection>` ({kibana-issue}189676[#189676]).
+
+====
+// end::known-issue-189676[]
+
+[discrete]
+[[enhancements-8.15.4]]
+==== Enhancements
+* Enhances {elastic-defend} by improving the `call_stack_final_user_module` attribution where potential `proxy_call` modules are encountered during Windows call stack analysis.
+
+[discrete]
+[[bug-fixes-8.15.4]]
+==== Bug fixes
+* Fixes a conflict that could result in a Windows boot failure `0xC000007B` for `ElasticElam.sys` when {elastic-defend} 8.15.2 or 8.15.3 was installed alongside CrowdStrike.
+* Fixes a bug that caused an Elastic AI Assistant error if you had over 20 conversations and tried to access or update any of them ({kibana-pull}197305[#197305]).
+* Makes Automatic Import more forgiving if LLMs return ECS mappings in unexpected formats ({kibana-pull}195167[#195167]).
+* Fixes a bug that caused fields from all indices to display when adding a filter to a rule that you were editing. Now, only fields from the rule's specified indices appear ({kibana-pull}194678[#194678], {kibana-pull}181643[#181643]).
+* Improves {elastic-defend} by making the `elastic-endpoint status` command more reliable. Before this fix, the command occasionally failed with an I/O error.
+* Fixes an {elastic-defend} process crash that could occur if it was configured to use the Kafka output.
+* Fixes a bug where {elastic-defend} could fail to properly enrich Windows API events for short-lived processes on older operating systems that didn't natively include this telemetry, such as Windows Server 2019. This could result in dropped or unattributed API events.  
+* Ensures that {elastic-defend} does not emit an empty `memory_region` if it can't enrich a memory region in an API event. After this fix, {elastic-defend} removes these fields.
+* Fixes an {elastic-defend} bug where Windows API events could be dropped if they contained Unicode characters that couldn't be converted to ANSI.
+
 [discrete]
 [[release-notes-8.15.3]]
 === 8.15.3
@@ -26,7 +63,6 @@ On August 1, 2024, it was discovered that Elastic AI Assistant's responses when
 * Fixes a bug that could cause {elastic-defend} to crash on Linux when scanning paths (or paths with children) which include virtual file systems, such as procfs.
 * Fixes a bug that made alerts wrongfully inherit previously-selected tags ({kibana-pull}194428[#194428]).
 * Prevents Automatic Import from requesting that LLMs map to reserved ECS fields ({kibana-pull}195168[#195168]).
-* Makes Automatic Import more forgiving if LLMs return ECS mappings in unexpected formats ({kibana-pull}195167[#195167]).
 * Fixes an Automatic Import bug that prevented non-ECS compatible fields from resolving in structured and unstructured system logs ({kibana-pull}194727[#194727]).
 * Fixes an Automatic Import bug that occurred when uploading a new version of an existing integration ({kibana-pull}194298[#194298]).
 * Fixes an Automatic Import bug that caused integration deployments to fail after you edited the ingest pipeline ({kibana-pull}194203[#194203]).