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CVE-2015-4042

31
FAUCET Score

CVE-2015-4042 is an integer overflow vulnerability in the keycompare_mb function within the sort utility of GNU Coreutils through version 8.23. This flaw, rated 9.8 Critical, allows unauthenticated attackers to cause a denial of service (application crash) and potentially other unspecified impacts by providing specially crafted long strings. While no public exploit code or active exploitation has been observed, the vulnerability has garnered significant community discussion, indicating awareness among security researchers.

Impacted Technologies

VendorProductVersion(s)CPE
<= 8.23CPE matchmatch criteria
cpe:2.3:a:gnu:coreutils:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
2.32%
Probability of exploitation in next 30 days
EPSS Percentile
81.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0232 is in the 71st percentile among its peer group of 36,829 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 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 (3)

github_advisorypatch availablevia nvd_reference
View patch
redhatno patchvia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: coreutils
redhatno patchvia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: coreutils

Vendor Advisories (1)

redhatCVE-2015-4042Low

coreutils: possible buffer overflow in keycompare_mb()

Apr 27, 2015

References

openwall.com / lists/oss-security/2015/05/15/1
ExploitMailing ListPatchThird Party Advisory
github.com / pixelb/coreutils/commit/bea5e36cc876ed627bb5e0eca36fdfaa6465e940
PatchThird Party Advisory