After installing Plesk Obsidian, segfaults start to appear on the server:
# dmesg | grep segfault
[14947.472336] sshd: segfault at 7f013eb01ba0 ip 00007f013eb01ba0 sp 00007ffcb9a1b418 error 14 in libnss_myhostname.so.2[7f013f772000+12000]
[15038.425150] sshd: segfault at 7f222dbbcba0 ip 00007f222dbbcba0 sp 00007ffdc0733ed8 error 14 in libnss_dns-2.17.so[7f222e82d000+5000]
CentOs 7 is used
A bug in the product with the id #PPPM-10986 which is planned to be fixed in future Plesk updates.
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There is currently no workaround available.
The issue only occurs on failed SSH login attempts so it should not affect anything, as this happens in sshd worker cleanup (when client connection attempt was already processed).