Affected versions append root to group listings, unless the correct listing has exactly 1024 groups.

This affects both:

• The supplementary groups of a user
• The group access list of the current process

If the caller uses this information for access control, this may lead to privilege escalation.

This crate is not currently maintained, so a patched version is not available.

Versions older than 0.8.0 do not contain the affected functions, so downgrading to them is a workaround.

Recommended alternatives

• uzers (an actively maintained fork of the users crate)
• sysinfo

References

• ogham/rust-users#44
• https://rustsec.org/advisories/RUSTSEC-2025-0040.html