How severe is CVE-2024-56433?

CVE-2024-56433 has a CVSS 3.x base score of 3.6, rated low severity. It is exploitable over local access with high attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2024-56433 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (32nd percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2024-56433?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2024-56433 have an EU (EUVD) identifier?

Yes. CVE-2024-56433 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-53142.

When was CVE-2024-56433 published?

CVE-2024-56433 was published on 2024-12-26 and last updated on 2026-06-17.

CVE-2024-56433

CVE-2024-56433 is a low-severity vulnerability with a CVSS 3.x base score of 3.6. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-1188.

Key facts

Severity: Low (CVSS 3.x base score 3.6)
EPSS exploit prediction: 0% (32nd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2024-53142
Weakness: CWE-1188
Published: 2024-12-26
Last modified: 2026-06-17

Description

shadow-utils (aka shadow) 4.4 through 4.17.0 establishes a default /etc/subuid behavior (e.g., uid 100000 through 165535 for the first user account) that can realistically conflict with the uids of users defined on locally administered networks, potentially leading to account takeover, e.g., by leveraging newuidmap for access to an NFS home directory (or same-host resources in the case of remote logins by these local network users). NOTE: it may also be argued that system administrators should not have assigned uids, within local networks, that are within the range that can occur in /etc/subuid.

Frequently asked questions

What is CVE-2024-56433?: shadow-utils (aka shadow) 4.4 through 4.17.0 establishes a default /etc/subuid behavior (e.g., uid 100000 through 165535 for the first user account) that can realistically conflict with the uids of users defined on locally administered networks, potentially leading to account takeover, e.g., by leveraging newuidmap for access to an NFS home directory (or same-host resources in the case of remote logins by these local network users). NOTE: it may also be argued that system administrators should not have assigned uids, within local networks, that are within the range that can occur in /etc/subuid.
How severe is CVE-2024-56433?: CVE-2024-56433 has a CVSS 3.x base score of 3.6, rated low severity. It is exploitable over local access with high attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2024-56433 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (32nd percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2024-56433?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2024-56433 have an EU (EUVD) identifier?: Yes. CVE-2024-56433 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-53142.
When was CVE-2024-56433 published?: CVE-2024-56433 was published on 2024-12-26 and last updated on 2026-06-17.

References

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