Ubuntu 18.04 Ethernet Unclaimed

I've just installed Ubuntu on my computer and it's refusing to connect to ethernet. I've tried installing new drivers and updating the kernel to no avail.

03:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. Device 8125 (rev 04)
    Subsystem: Micro-Star International Co., Ltd. [MSI] Device 7d18
    Flags: fast devsel, IRQ 16
    I/O ports at 3000 [size=256]
    Memory at a3200000 (64-bit, non-prefetchable) [size=64K]
    Memory at a3210000 (64-bit, non-prefetchable) [size=16K]
    Capabilities: [40] Power Management version 3
    Capabilities: [50] MSI: Enable- Count=1/1 Maskable+ 64bit+
    Capabilities: [70] Express Endpoint, MSI 01
    Capabilities: [b0] MSI-X: Enable- Count=32 Masked-
    Capabilities: [d0] Vital Product Data
    Capabilities: [100] Advanced Error Reporting
    Capabilities: [148] Virtual Channel
    Capabilities: [168] Device Serial Number 01-00-00-00-68-4c-e0-00
    Capabilities: [178] Transaction Processing Hints
    Capabilities: [204] Latency Tolerance Reporting
    Capabilities: [20c] L1 PM Substates
    Capabilities: [21c] Vendor Specific Information: ID=0002 Rev=4 Len=100 <?>
    Kernel modules: r8169

ubuntu@ubuntu:~$ sudo lshw -C network
  *-network UNCLAIMED       
       description: Ethernet controller
       product: Realtek Semiconductor Co., Ltd.
       vendor: Realtek Semiconductor Co., Ltd.
       physical id: 0
       bus info: pci@0000:03:00.0
       version: 04
       width: 64 bits
       clock: 33MHz
       capabilities: pm msi pciexpress msix vpd cap_list
       configuration: latency=0
       resources: ioport:3000(size=256) memory:a3200000-a320ffff memory:a3210000-a3213fff
  *-network
       description: Wireless interface
       physical id: 2
       bus info: usb@1:5
       logical name: wlx984827e17428
       serial: 98:48:27:e1:74:28
       capabilities: ethernet physical wireless
       configuration: broadcast=yes driver=r8188eu ip=172.26.104.151 multicast=yes wireless=IEEE 802.11bgn```

Support for RTL8125B was added in kernel version 5.9. So use a recent enough kernel version, or if this is no option use r8125 driver package instead.