Boot: Impossible to/cannot allocate kernel buffer.

Less than one week ago, I suddenly has a issue with GRUB (kernel 5.15.0.71-generic). My English translation: Impossible to allocate the kernel's buffer (cannot allocate kernel buffer), french: 'erreur : impossible d'allouer le tampom du noyau').

I can only run Ubuntu (from the Advanced line of GRUB) with the previous kernel (5.15.0.70-generic). I don't remember any special change nor installation on my OS.

CPU: AMD Ryzen 5 3400G.

lsb_release -a
'Description: Ubuntu 22.04.2 LTS' (In fact it is Xubuntu).

uname -a
'Linux Desktop-angle 5.15.0-70-generic #77-Ubuntu SMP Tue Mar 21 14:02:37 UTC 2023 x86_64 x86_64 x86_64 GNU/Linux'

ProblemType: Bug
DistroRelease: Ubuntu 22.04
Package: linux-image-5.15.0-70-generic 5.15.0-70.77
ProcVersionSignature: Ubuntu 5.15.0-70.77-generic 5.15.92
Uname: Linux 5.15.0-70-generic x86_64
ApportVersion: 2.20.11-0ubuntu82.4
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC1: walter 1378 F.... pulseaudio
 /dev/snd/pcmC1D0p: walter 1378 F...m pulseaudio
 /dev/snd/controlC0: walter 1378 F.... pulseaudio
CRDA: N/A
CasperMD5CheckResult: pass
CurrentDesktop: XFCE
Date: Fri May 5 16:17:49 2023
InstallationDate: Installed on 2022-05-18 (351 days ago)
InstallationMedia: Xubuntu 22.04 LTS "Jammy Jellyfish" - Release amd64 (20220419)
IwConfig:
 lo no wireless extensions.

 enp5s0 no wireless extensions.
MachineType: To Be Filled By O.E.M. To Be Filled By O.E.M.
ProcEnviron:
 LANGUAGE=fr_FR
 TERM=xterm-256color
 PATH=(custom, no user)
 LANG=fr_FR.UTF-8
 SHELL=/bin/bash
ProcFB: 0 amdgpudrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.15.0-70-generic root=UUID=f096b121-cafc-43cb-ad95-ae3aafb9457e ro quiet splash vt.handoff=7
PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No PulseAudio daemon running, or not running as session daemon.
RelatedPackageVersions:
 linux-restricted-modules-5.15.0-70-generic N/A
 linux-backports-modules-5.15.0-70-generic N/A
 linux-firmware 20220329.git681281e4-0ubuntu3.12
RfKill:

SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 07/16/2020
dmi.bios.release: 5.14
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: P4.00
dmi.board.name: A320M-HDV R4.0
dmi.board.vendor: ASRock
dmi.chassis.asset.tag: To Be Filled By O.E.M.
dmi.chassis.type: 3
dmi.chassis.vendor: To Be Filled By O.E.M.
dmi.chassis.version: To Be Filled By O.E.M.
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrP4.00:bd07/16/2020:br5.14:svnToBeFilledByO.E.M.:pnToBeFilledByO.E.M.:pvrToBeFilledByO.E.M.:rvnASRock:rnA320M-HDVR4.0:rvr:cvnToBeFilledByO.E.M.:ct3:cvrToBeFilledByO.E.M.:skuToBeFilledByO.E.M.:
dmi.product.family: To Be Filled By O.E.M.
dmi.product.name: To Be Filled By O.E.M.
dmi.product.sku: To Be Filled By O.E.M.
dmi.product.version: To Be Filled By O.E.M.
dmi.sys.vendor: To Be Filled By O.E.M.