Per https://www.qualys.com/2024/07/01/cve-2024-6387/regresshion.... they developed the exploit on Debian and Ubuntu on i386, but I don't believe there's any reason to think that it wouldn't work on other architectures. There are some things that suggest to my non-expert reading that it's harder to exploit on 64-bit architectures, and other libc implementations may be immune, but it wouldn't surprise me at all if Raspberry Pi OS (AKA Debian with some modifications) on a Pi was 32-bit and vulnerable.
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Per https://www.qualys.com/2024/07/01/cve-2024-6387/regresshion.... they developed the exploit on Debian and Ubuntu on i386, but I don't believe there's any reason to think that it wouldn't work on other architectures. There are some things that suggest to my non-expert reading that it's harder to exploit on 64-bit architectures, and other libc implementations may be immune, but it wouldn't surprise me at all if Raspberry Pi OS (AKA Debian with some modifications) on a Pi was 32-bit and vulnerable.