An issue was discovered in the nix crate 0.16.0 and later before 0.20.2 0.21.x before 0.21.2 and 0.22.x before 0.22.2 for Rust. unistd::getgrouplist has an out-of-bounds write if a user is in more than 16 /etc/groups groups.

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SUSE CVE-2005-3590

The getgrouplist function in the GNU C library glibc before version 2.3.5, when invoked with a zero argument, writes to the passed pointer even if the specified array size is zero, leading to a buffer overflow and potentially allowing attackers to corrupt memory...