Control: found -1 2.31-13+deb11u3 Same for bpo:
% file /lib32/libpthread-2.31.so /lib/x86_64-linux-gnu/libpthread-2.31.so /lib32/libpthread-2.31.so: ELF 32-bit LSB shared object, Intel 80386, version 1 (SYSV), dynamically linked, interpreter /lib/ld-linux.so.2, BuildID[sha1]=e4a9da11c83d819971e1007d0e0cb68b56fc99dd, for GNU/Linux 3.2.0, not stripped /lib/x86_64-linux-gnu/libpthread-2.31.so: ELF 64-bit LSB shared object, x86-64, version 1 (SYSV), dynamically linked, interpreter /lib64/ld-linux-x86-64.so.2, BuildID[sha1]=5018237bbf012b4094027fd0b96fc22a24496ea4, for GNU/Linux 3.2.0, not stripped