I have the same problem. With Kernel 6.11 it works but it do not working with kernel 6.18. Here some dmesg entries:
// with kernel 6.18
[ 186.023666] [ T2451] iwlwifi 0000:03:00.0: Detected crf-id 0xa5a5a5a1, cnv-id 0xa5a5a5a1 wfpm id 0xa5a5a5a1
[ 186.023676] [ T2451] iwlwifi 0000:03:00.0: PCI dev 4237/1211, rev=0x54, rfid=0xd55555d5
[ 186.023682] [ T2451] iwlwifi 0000:03:00.0: Detected Intel(R) WiFi Link 5100 AGN
[ 186.059282] [ T719] iwlwifi 0000:03:00.0: Driver unable to support your firmware API. Driver supports FW core 4294967294..2, firmware is 2.
[ 186.059456] [ T721] iwlwifi 0000:03:00.0: Direct firmware load for iwlwifi-5000-4.ucode failed with error -2
[ 186.059521] [ T719] iwlwifi 0000:03:00.0: Direct firmware load for iwlwifi-5000-3.ucode failed with error -2
[ 186.059579] [ T719] iwlwifi 0000:03:00.0: Direct firmware load for iwlwifi-5000-2.ucode failed with error -2
[ 186.059630] [ T719] iwlwifi 0000:03:00.0: Direct firmware load for iwlwifi-5000-1.ucode failed with error -2
[ 186.059634] [ T719] iwlwifi 0000:03:00.0: no suitable firmware found!
[ 186.059647] [ T719] iwlwifi 0000:03:00.0: minimum version required: iwlwifi-5000-1
[ 186.059658] [ T719] iwlwifi 0000:03:00.0: maximum version supported: iwlwifi-5000-5
[ 186.059670] [ T719] iwlwifi 0000:03:00.0: check git://git.kernel.org/pub/scm/linux/kernel/git/firmware/linux-firmware.git
// with kernel 6.11
iwlwifi 0000:03:00.0: loaded firmware version 8.83.5.1 build 33692 5000-5.ucode op_mode iwldvm
Has anybody a solution?