XCP-ng 8.3 updates announcements and testing

psafont

@rzr We've found a regression in the VM revert with the new version of xapi (26.1.11)

The CD VBDs of the pre-revert are not removed when reverting, this means that the reverted VM usually ends up with duplicated VBDs for CDs.

We've verified a fix for it and we're integrating it as soon as possible. This means that this test cycle will take longer.

ScarfAntennae

@rzr @stormi Perfect, thanks for clarifying!

rzr

New maintenance update candidates for XCP-ng 8.3 LTS

This release batch contains fixes, and a security fix on an optional package,

Note: the two previous batches of updates has not been released yet, so if you haven't tested it, you will see more updates than described here when you'll install the update candidates. Refer to the previous announcements.

What changed

Virtualization & System

kexec-tools: Update to sync with Xen Server:
- Add checks to reboot a crashed host if kernel crash handling doesn't complete.

Control Plane

xapi: Fix the VM revert regression introduced in earlier "testing" version.

Optional package

lldpd: Fix CVE-2026-46433, a buffer over-read when processing the "VLAN tags" from an Ethernet frame.

Versions

kexec-tools: 2.0.15-20.1.xcp-ng8.3 -> kexec-tools-2.0.15-21.1.xcpng8.3
xapi: 26.1.11-1.1.xcpng8.3 -> xapi-26.1.11-1.2.xcpng8.3

Optional packages:

lldpd: 1.0.4-1.1.xcpng8.3 -> 1.0.4-1.2.xcpng8.3

Test on XCP-ng 8.3

Warning: XOSTOR users, refer to the instructions in the previous announcement, which apply here if you haven't installed the previous update candidates.

yum clean metadata --enablerepo=xcp-ng-testing,xcp-ng-candidates
yum update --enablerepo=xcp-ng-testing,xcp-ng-candidates
reboot

The usual update rules apply: pool coordinator first, etc.

What to test

As usual, normal use and anything else you want to test.

Test window before official release of the updates

~2 days

We would like to thank users who reported feedback since our last call for testing:
@Andrew, @ScarfAntennae, @XCP-ng-JustGreat, @acebmxer, @bufanda, @flakpyro

acebmxer

@rzr

Updates applied...

Updated:
  forkexecd.x86_64 0:26.1.11-1.2.xcpng8.3                         kexec-tools.x86_64 1:2.0.15-21.1.xcpng8.3                           
  message-switch.x86_64 0:26.1.11-1.2.xcpng8.3                    qcow-stream-tool.x86_64 0:26.1.11-1.2.xcpng8.3                      
  rrdd-plugins.x86_64 0:26.1.11-1.2.xcpng8.3                      sm-cli.x86_64 0:26.1.11-1.2.xcpng8.3                                
  squeezed.x86_64 0:26.1.11-1.2.xcpng8.3                          varstored-guard.x86_64 0:26.1.11-1.2.xcpng8.3                       
  vhd-tool.x86_64 0:26.1.11-1.2.xcpng8.3                          wsproxy.x86_64 0:26.1.11-1.2.xcpng8.3                               
  xapi-core.x86_64 0:26.1.11-1.2.xcpng8.3                         xapi-nbd.x86_64 0:26.1.11-1.2.xcpng8.3                              
  xapi-rrd2csv.x86_64 0:26.1.11-1.2.xcpng8.3                      xapi-storage-script.x86_64 0:26.1.11-1.2.xcpng8.3                   
  xapi-tests.x86_64 0:26.1.11-1.2.xcpng8.3                        xapi-xe.x86_64 0:26.1.11-1.2.xcpng8.3                               
  xcp-networkd.x86_64 0:26.1.11-1.2.xcpng8.3                      xcp-rrdd.x86_64 0:26.1.11-1.2.xcpng8.3                              
  xenopsd.x86_64 0:26.1.11-1.2.xcpng8.3                           xenopsd-cli.x86_64 0:26.1.11-1.2.xcpng8.3                           
  xenopsd-xc.x86_64 0:26.1.11-1.2.xcpng8.3                       

Complete!

Will continue to test.

flakpyro

No issues to report so far.

Andrew

@rzr Again, installed on several active pools. Running correctly for my use.

XCP-ng-JustGreat

Applied the latest batch of updates with no apparent problems.

bufanda

Applied patches yesterday, No issue seen until today.

rzr

We pushed the tested packages (of 3 batches) to the xcp-ng-updates repository, check blog post for summary and related advisories:

https://xcp-ng.org/blog/2026/06/23/june-2026-updates-2-for-xcp-ng-8-3-lts/

Thanks everyone for the tests!

marcoi

Applied the latest pushed updated to production, no major issues.
The only thing to note is my backup XCP config failed Sunday, some time post the patches being applied. The error was the Body Timeout Error. This morning the backup ran without issues. Not sure why, but it wasn't a big deal and it working now. So not sure tied in with patching or not.