Kernel x86_64 6.14.5-300.fc42 unpacking failed

Getting; 'Initrmfs unpacking failed: junk within compressed archive` …
It’s interesting the KVM for keyboard/mouse does not work so I can’t select another kernel. I connected a keyboard directly and was able to login with older kernel.

Sounds like the initramfs was not built correctly.
I wonder if you /boot rad out of disk space?
Can you post the output of lsblk -f please?

Note: this an old dell 420 xp


NAME FSTYPE FSVER LABEL  UUID FSAVAIL FSUSE% MOUNTPOINTS
sda
├─sda1
│
├─sda2
│    ext4   1.0          131ffca6-bb3b-4c92-8729-0022cd637745 433.7M    49% /boot
└─sda3
     btrfs        fedora 536bdba0-b8a2-428c-a579-975dbc630c33 884.3G     5% /home
/
sdb
└─sdb1
     ntfs         Home2 2A36648036644EBF
sdc
sdd
sde
sdf
sr0
sr1
zram0
     swap   1     zram0 4b708d0d-119e-4321-87ab-f8d885402310                [SWAP]

I did a kernel reinstall and it worked