[icar]

Was Arch ever affected?

[BirAdam]

As vanilla Arch is sort of a meta-distro, it would largely depend upon what the user chose to install and use. For any one of the many spins of Arch, maybe? But one would need to audit each individually.

[jillesvangurp]

Briefly maybe, until somebody fixed it and then everyone updated and moved on with their lives. That kind of is the point of rolling distributions.