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CVE-2016-6252

23
FAUCET Score

CVE-2016-6252 describes an integer overflow vulnerability in shadow 4.2.1, specifically affecting the newuidmap utility. This flaw allows a local attacker to gain elevated privileges by providing specially crafted input. With a CVSS v3 score of 7.8 (High), successful exploitation could lead to high impact on confidentiality, integrity, and availability, requiring low attack complexity and user privileges. There is currently no evidence of active exploitation, and no public exploit code or significant community discussion has been identified.

Impacted Technologies

VendorProductVersion(s)CPE
4.2.1CPE matchmatch criteria
cpe:2.3:a:shadow_project:shadow:4.2.1:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

7.8HIGH

CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
1.8
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
0.41%
Probability of exploitation in next 30 days
EPSS Percentile
33.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-24
Model: v2026.06.15
This CVE's current EPSS score of 0.0041 is in the 73rd percentile among its peer group of 16,974 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.2 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

github_advisorypatch availablevia nvd_reference
View patch

Vendor Advisories (1)

redhatCVE-2016-6252Moderate

shadow-utils: Incorrect integer handling results in LPE

Jul 19, 2016

References

bugzilla.suse.com / show_bug.cgi
Issue TrackingPatch
github.com / shadow-maint/shadow/issues/27
Issue TrackingPatchThird Party Advisory
security.gentoo.org / glsa/201706-02
debian.org / security/2017/dsa-3793
openwall.com / lists/oss-security/2016/07/19/6
Mailing ListThird Party Advisory
openwall.com / lists/oss-security/2016/07/19/7
Mailing ListThird Party Advisory
openwall.com / lists/oss-security/2016/07/20/2
Mailing ListThird Party Advisory
openwall.com / lists/oss-security/2016/07/25/7
Mailing ListPatchThird Party Advisory
securityfocus.com / bid/92055
Third Party AdvisoryVDB Entry