Local privilege escalation via zero-filled group entries
Published Jun 6, 2025 · Updated Nov 20, 2025
Privilege escalation in affected Rust users crate releases allows local users to gain elevated access through false root-group membership. The Unix group-listing functions allocate 1,024 zeroed GID slots, let libc fill only the returned count, then iterate every slot and treat unused zeroes as GID 0. Exploitation requires a caller that relies on the returned supplementary-group or process access list for authorization, allowing unauthorized reads and writes without service interruption.
Summary
What happened
Privilege escalation in affected Rust users crate releases allows local users to gain elevated access through false root-group membership. The Unix group-listing functions allocate 1,024 zeroed GID slots, let libc fill only the returned count, then iterate every slot and treat unused zeroes as GID 0. Exploitation requires a caller that relies on the returned supplementary-group or process access list for authorization, allowing unauthorized reads and writes without service interruption.
The record
- CVE
- CVE-2025-5791
- Published
- Jun 6, 2025
- Updated
- Nov 20, 2025
- Vendor
- 389 Directory Server
- Product
- Red Hat OpenShift sandboxed containers
- Classifications
- CWE-266
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Jun 6, 2025CVE publishedPublication date reported by the CVE source.
- Nov 20, 2025Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Affected versions are unavailable in this record. Check the vendor advisory for version and patch details.
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
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Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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