From 87b3fb2f25bbb92e7ee931f206e24e2b57da0f3c Mon Sep 17 00:00:00 2001
From: Doug Burks <doug.burks@securityonionsolutions.com>
Date: Thu, 10 Sep 2026 15:52:46 -0400
Subject: [PATCH] update release notes with elastic cpu known issue

---
 docs/release-notes.md | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/docs/release-notes.md b/docs/release-notes.md
index 0788dc00..0d9b168d 100644
--- a/docs/release-notes.md
+++ b/docs/release-notes.md
@@ -2,6 +2,15 @@
 
 ### Known Issues
 
+Elastic recently changed made a change which requires x86_64-v3 CPU support:
+<https://github.com/elastic/elastic-agent/issues/16309>
+<https://github.com/elastic/beats/issues/51824>
+
+If you are running Security Onion in a Proxmox VM, we recommend setting your CPU to host to make sure that your x86_64-v3 CPU is passed through to the VM:
+<https://docs.securityonion.net/en/3/main/proxmox/#cpu>
+
+If your CPUs do not support x86_64-v3 at all, then we recommend holding off on this upgrade until Elastic has resolved this issue.
+
 For all other known issues, please see <https://github.com/Security-Onion-Solutions/securityonion/issues>.
 
 ### Release History