readelf riscv unknown

1)
Description: Ubuntu 22.04.3 LTS
Release: 22.04

2)
binutils:
  Installed: 2.38-4ubuntu2.3
  Candidate: 2.38-4ubuntu2.3
  Version table:
 *** 2.38-4ubuntu2.3 500
        500 http://be.archive.ubuntu.com/ubuntu jammy-updates/main amd64 Packages
        500 http://security.ubuntu.com/ubuntu jammy-security/main amd64 Packages
        100 /var/lib/dpkg/status
     2.38-3ubuntu1 500
        500 http://be.archive.ubuntu.com/ubuntu jammy/main amd64 Packages

3)
I'm hand assembling an ELF file and the readelf utility in the binutils package doesn't recognize riscv which is the e_machine 243. LoongArch or 258 and x86 or 3 are recognized, for example. But not riscv.

4)
Readelf states that 243 is an unknown e_machine.

ProblemType: Bug
DistroRelease: Ubuntu 22.04
Package: binutils 2.38-4ubuntu2.3
ProcVersionSignature: Ubuntu 6.2.0-34.34~22.04.1-generic 6.2.16
Uname: Linux 6.2.0-34-generic x86_64
ApportVersion: 2.20.11-0ubuntu82.5
Architecture: amd64
CasperMD5CheckResult: pass
CurrentDesktop: XFCE
Date: Thu Oct 12 10:14:30 2023
InstallationDate: Installed on 2023-07-12 (91 days ago)
InstallationMedia: Xubuntu 22.04.2 LTS "Jammy Jellyfish" - Release amd64 (20230223)
SourcePackage: binutils
UpgradeStatus: No upgrade log present (probably fresh install)