Memory corruption detected in low memory

That laptop (intel PIV) was running xenial (kernel 4.4) without problem. Now that the bionic upgrade have been done (kernel 4.15), journalctl -b have logged:

 kernel: Memory corruption detected in low memory
 kernel: WARNING: CPU: 0 PID: 32 at /build/linux-QWz1wR/linux-4.15.0/arch/x86/kernel/check.c:142 check_for_bios_corruption+0x8c/0xc0

 kernel: Modules linked in:
 kernel: CPU: 0 PID: 32 Comm: kworker/0:1 Not tainted 4.15.0-15-generic #16-Ubuntu
 kernel: Hardware name: MEDION M296M/ , BIOS NOTE BIOS Version/L2850100 11/14/2002
 kernel: Workqueue: events check_corruption
 kernel: EIP: check_for_bios_corruption+0x8c/0xc0
 kernel: EFLAGS: 00210296 CPU: 0
 kernel: EAX: 00000028 EBX: c0010000 ECX: 00000198 EDX: 00000000
 kernel: ESI: 00000000 EDI: cde1f2b0 EBP: f5477f30 ESP: f5477f1c
 kernel: DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068
 kernel: CR0: 80050033 CR2: 00000000 CR3: 0de0f000 CR4: 000006f0
 kernel: Call Trace:
 kernel: TCP: Hash tables configured (established 8192 bind 8192)
 kernel: UDP hash table entries: 512 (order: 2, 16384 bytes)
 kernel: UDP-Lite hash table entries: 512 (order: 2, 16384 bytes)
kernel: NET: Registered protocol family 1
 kernel: ACPI: PCI Interrupt Link [LNKE] enabled at IRQ 5
 kernel: PCI: setting IRQ 5 as level-triggered
 kernel: ACPI: PCI Interrupt Link [LNKF] enabled at IRQ 5
 kernel: ACPI: PCI Interrupt Link [LNKG] enabled at IRQ 5
 kernel: pci 0000:00:03.3: enabling device (0000 -> 0002)
 kernel: ACPI: PCI Interrupt Link [LNKH] enabled at IRQ 5
 kernel: pci 0000:01:00.0: Video device with shadowed ROM at [mem 0x000c0000-0x000dffff]
 kernel: PCI: CLS 16 bytes, default 64
 kernel: Unpacking initramfs...
 kernel: Freeing initrd memory: 48800K
 kernel: Scanning for low memory corruption every 60 seconds
 kernel: Corrupted low memory at f11b93a5 (4e14 phys) = 00001039
 kernel: Corrupted low memory at aa7e680c (4e18 phys) = 22100007
 kernel: Corrupted low memory at 07d67f4e (4e1c phys) = 06000000
 kernel: Corrupted low memory at 14e58341 (4e20 phys) = 00802000
 kernel: Corrupted low memory at 177ce42b (4e24 phys) = d0000000
 kernel: Corrupted low memory at a4c6d47a (4e48 phys) = 000000c0
 kernel: Corrupted low memory at ab7c4974 (4e64 phys) = 837009fe
 kernel: Corrupted low memory at 5d1625c4 (4e68 phys) = 00b71303
 kernel: Corrupted low memory at 86bf688b (4e6c phys) = 50082502
 kernel: Corrupted low memory at 78519e78 (4e70 phys) = 0b32d512
 kernel: Corrupted low memory at cefe909f (4e74 phys) = 00006f6f
 kernel: Corrupted low memory at efb2e08f (4e78 phys) = 801a0003
 kernel: Corrupted low memory at c5b91a0b (4e7c phys) = 00e98001
 kernel: Corrupted low memory at 662c373b (4e80 phys) = 0000004f
 kernel: Corrupted low memory at 5ff6a218 (4e84 phys) = 00309e3f
 kernel: Corrupted low memory at b1b63dbd (4e88 phys) = 00600002
 kernel: Corrupted low memory at bc8cc516 (4e90 phys) = 00100002
 kernel: Corrupted low memory at be02ab1d (4e94 phys) = 00302622
 kernel: Corrupted low memory at 92c91e75 (4e98 phys) = 0b800085
 kernel: Corrupted low memory at fd16c7d0 (4e9c phys) = 01000c20
 kernel: Corrupted low memory at 068765bf (4ea0 phys) = 80040000
 kernel: Corrupted low memory at 6500aa34 (4ea8 phys) = 01000060
 kernel: Corrupted low memory at 2dffebb8 (4eac phys) = 10741600
 kernel: Corrupted low memory at f4e7c54d (4eb0 phys) = 10000000
 kernel: Corrupted low memory at bdecb33f (4eb4 phys) = c233d4c2
 kernel: Corrupted low memory at c259f3aa (4eb8 phys) = 77010303
 kernel: Corrupted low memory at ded7243b (4ebc phys) = c2005000
 kernel: Corrupted low memory at 60e188a8 (4ec0 phys) = 08000142
 kernel: Corrupted low memory at d446d5b1 (4ec4 phys) = 10000000
 kernel: Corrupted low memory at a39f733b (4ec8 phys) = 4f000000
 kernel: Corrupted low memory at ecda55e9 (4ecc phys) = 30304fee
 kernel: Corrupted low memory at e5fee885 (4ed0 phys) = 85000000
 kernel: Corrupted low memory at f1a141fa (4ed4 phys) = 00200002
 kernel: Corrupted low memory at 70088389 (4ed8 phys) = 1f000207
 kernel: Corrupted low memory at f61ca70e (4ee4 phys) = 06334222
 kernel: Corrupted low memory at d031d304 (4ee8 phys) = 01ffff49
 kernel: Corrupted low memory at abbcf68b (4eec phys) = 00aa6666
 kernel: Corrupted low memory at d159587d (4ef0 phys) = 000000cc
 kernel: ------------[ cut here ]------------
 kernel: Memory corruption detected in low memory
 kernel: WARNING: CPU: 0 PID: 32 at /build/linux-QWz1wR/linux-4.15.0/arch/x86/kernel/check.c:142 check_for_bios_corruption+0x8c/0xc0

 kernel: Modules linked in:
kernel: CPU: 0 PID: 32 Comm: kworker/0:1 Not tainted 4.15.0-15-generic #16-Ubuntu
 kernel: Hardware name: MEDION M296M/ , BIOS NOTE BIOS Version/L2850100 11/14/2002
 kernel: Workqueue: events check_corruption
 kernel: EIP: check_for_bios_corruption+0x8c/0xc0
 kernel: EFLAGS: 00210296 CPU: 0
 kernel: EAX: 00000028 EBX: c0010000 ECX: 00000198 EDX: 00000000
 kernel: ESI: 00000000 EDI: cde1f2b0 EBP: f5477f30 ESP: f5477f1c
 kernel: DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068
 kernel: CR0: 80050033 CR2: 00000000 CR3: 0de0f000 CR4: 000006f0
 kernel: Call Trace:
 kernel: check_corruption+0xd/0x40
kernel: process_one_work+0x1b9/0x3d0
kernel: worker_thread+0x37/0x420
 kernel: kthread+0xf0/0x110
 kernel: ? process_one_work+0x3d0/0x3d0
 kernel: ? kthread_create_worker_on_cpu+0x20/0x20
 kernel: ret_from_fork+0x2e/0x38
 kernel: Code: 65 f4 5b 5e 5f 5d c3 90 8d b4 26 00 00 00 00 f3 c3 80 3d 60 48 cb cd 00 75 e5 68 34 51 ae cd c6 05 60 48 cb cd 01 e8 74 2f 01 00 <0f> 0b 58 eb cf 50 8d 83 00 00 00 40 89 55 f0 50 53 68 00 51 ae
 kernel: ---[ end trace eecf6203e0df004c ]---

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: linux-image-4.15.0-15-generic 4.15.0-15.16
ProcVersionSignature: Ubuntu 4.15.0-15.16-generic 4.15.15
Uname: Linux 4.15.0-15-generic i686
ApportVersion: 2.20.9-0ubuntu4
Architecture: i386
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: oem 1296 F.... pulseaudio
CurrentDesktop: LXDE
Date: Mon Apr 9 14:34:13 2018
HibernationDevice: RESUME=UUID=662d2878-6a53-4bc7-a6cc-d7bd9d1806b2
InstallationDate: Installed on 2013-10-21 (1631 days ago)
InstallationMedia: Ubuntu 9.10 "Karmic Koala" - Release i386 (20091028.5)
IwConfig:
 lo no wireless extensions.

 eth0 no wireless extensions.
Lsusb:
 Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
 Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
 Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
 Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
MachineType: MEDION M296M
PccardctlIdent:
 Socket 0:
   no product info available
PccardctlStatus:
 Socket 0:
   no card
ProcFB: 0 radeondrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.0-15-generic root=UUID=ed4abcae-c35b-4eb9-8400-dbefca805fb1 ro
RelatedPackageVersions:
 linux-restricted-modules-4.15.0-15-generic N/A
 linux-backports-modules-4.15.0-15-generic N/A
 linux-firmware 1.173
RfKill:

SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 11/14/2002
dmi.bios.vendor: MEDION
dmi.bios.version: NOTE BIOS Version/L2850100
dmi.board.vendor: MEDION
dmi.chassis.type: 10
dmi.chassis.vendor: MEDION
dmi.modalias: dmi:bvnMEDION:bvrNOTEBIOSVersion/L2850100:bd11/14/2002:svnMEDION:pnM296M:pvr:rvnMEDION:rn:rvr:cvnMEDION:ct10:cvr:
dmi.product.name: M296M
dmi.sys.vendor: MEDION