Thanks for confirming - agreed, repro is as easy as
1. apt install numad
2. systemctl start numad
$ systemctl status numad
× numad.service - numad - The NUMA daemon that manages application locality.
Loaded: loaded (/usr/lib/systemd/system/numad.service; enabled; preset:
enabled)
Active: failed (Result: core-dump) since Mon 2026-02-09 09:14:41 UTC; 3s
ago
Invocation: 1a0663910bef4e08a5f6d001342ca349
Docs: man:numad
Process: 8062 ExecStart=/usr/bin/numad $DAEMON_ARGS -i 15 (code=dumped,
signal=ABRT)
Mem peak: 1.7M
CPU: 5ms
Feb 09 09:14:40 r-testnumad systemd[1]: Starting numad.service - numad - The
NUMA daemon that manages application locality....
Feb 09 09:14:40 r-testnumad numad[8062]: *** buffer overflow detected ***:
terminated
Feb 09 09:14:41 r-testnumad systemd[1]: numad.service: Control process exited,
code=dumped, status=6/ABRT
Feb 09 09:14:41 r-testnumad systemd[1]: numad.service: Failed with result
'core-dump'.
Feb 09 09:14:41 r-testnumad systemd[1]: Failed to start numad.service - numad -
The NUMA daemon that manages application locality..
--
Even triggers in a 26.04 resulute container on a nuble system (so it
isn't the new kernel which might be the first assumption)
--
It also is not complex serveice start
As root one can just
/usr/bin/numad
*** buffer overflow detected ***: terminated
Aborted (core dumped) /usr/bin/numad
** Changed in: numad (Ubuntu)
Status: New => Confirmed
** Changed in: numad (Ubuntu)
Importance: Undecided => Critical
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https://bugs.launchpad.net/bugs/2139262
Title:
[Ubuntu26.04] [FW1110] : vm fails to start with memory hot plug ,error
:operation failed: Failed to query numad for the advisory nodeset
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