Integer overflow in shadow 4.2.1 allows local users to gain privileges via crafted input to newuidmap.
Priority LOW 34CWE-190Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.0 · NVD. Fix status from CNA. Impact type from CWE-190 and the CVSS impact.
Summary
Integer overflow in shadow 4.2.1 allows local users to gain privileges via crafted input to newuidmap.
Why it matters now
EPSS 0.00409 35th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:shadow_project:shadow:4.2.1:*:*:*:*:*:*:* | 4.2.1 | Vulnerable | Shadow Project |
- cpe:2.3:a:shadow_project:shadow:4.2.1:*:*:*:*:*:*:* Versions 4.2.1 Vulnerable ·Shadow Project
Remediation
No fixed version listed by the sources yet.
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
Not affected: 3 products
- Red Hat Enterprise Linux 5
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
Timeline
- 2026-10-02 Threatist record created from CVE-2016-6252
- 2026-10-03 Alias added: GHSA-8rg4-9fq3-cf7g
References
Patch 3
More Shadow Project Shadow vulnerabilities
- TI-2023-13773 In Shadow 4.13, it is possible to inject control characters into fields provided to the… CVSS 3.1LOW 3.3
- TI-2017-09165 In shadow before 4.5, the newusers tool could be made to manipulate internal data… CVSS 3.1CRITICAL 9.8
- TI-2019-14333 shadow 4.8, in certain circumstances affecting at least Gentoo, Arch Linux, and Void… CVSS 3.1HIGH 7.8
- TI-2018-05191 An issue was discovered in shadow 4.5. CVSS 3.0MEDIUM 5.3
Sources
- CVE-2016-6252 · CVE Program
- CVE-2016-6252 · NVD
- FIRST EPSS
- GHSA-8rg4-9fq3-cf7g · GitHub Advisory Database · CC BY 4.0
- CVE-2016-6252 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences