tb-build-04 and tb-build-05 running unsupported kernels
in the last security update batch, neither tb-build-04 or -05 were flagged by monitoring as requiring a reboot.
that's because they run this kernel:
Linux tb-build-04 6.1.0-9-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.1.27-1 (2023-05-08) x86_64 GNU/Linux
that seems to be a kernel from Debian unstable, as I can't find it in bullseye or bullseye-backports. the latest in backports is 6.1.20-2~bpo11+1, 7 minors behind the above.
why do we have a special kernel here? is a downgrade to 6.1.20 acceptable? or should we upgrade to bookworm, which has 6.1.37?