CVE-2018-4241

Exp

An issue was discovered in certain Apple products. iOS before 11.4 is affected. macOS before 10.13.5 is affected. tvOS before 11.4 is affected. watchOS before 4.3.1 is affected. The issue involves the "Kernel" component. A buffer overflow in mptcp_usr_connectx allows attackers to execute arbitrary code in a privileged context via a crafted app.

Published: 2018-06-08 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2018-4241 is rated High Exploit Risk (74.2/100): CVSS High severity, with high exploitation likelihood (EPSS 8.22%, 94th percentile). 3 public exploit reference(s) are indexed (Exploit-DB). Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2018-4241

EDB-ID Source Kind Published Link
44849 exploit_db edb 2018-06-06 Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2018-4241

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 21.54% 8.22% -13.31%
2 2026-02-11 34.96% 21.54% -13.43%
3 2026-02-09 — 34.96% —

Full EPSS history (21 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2018-4241

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.8 3.0 HIGH
CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:L)
They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:R)
A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 1.8 5.9 [email protected]
9.3 2.0 HIGH
AV:N/AC:M/Au:N/C:C/I:C/A:C Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:M)
Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:C)
Complete confidentiality impact.
Integrity impact (I:C)
Complete integrity impact.
Availability impact (A:C)
Complete availability impact.
 8.6 10.0 [email protected]

Weakness enumeration for CVE-2018-4241

Affected software / configurations for CVE-2018-4241

Vendor Product Version Raw CPE
apple apple_tv < 11.4 cpe:2.3:a:apple:apple_tv:*:*:*:*:*:*:*:*
apple iphone_os < 11.4 cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*
apple mac_os_x < 10.13.5 cpe:2.3:o:apple:mac_os_x:*:*:*:*:*:*:*:*
apple watchos < 4.3.1 cpe:2.3:o:apple:watchos:*:*:*:*:*:*:*:*

References for CVE-2018-4241

URL Tags
http://www.securitytracker.com/id/1041027 Third Party Advisory VDB Entry
https://bugs.chromium.org/p/project-zero/issues/detail?id=1558 Exploit Issue Tracking Third Party Advisory
https://support.apple.com/HT208848 Vendor Advisory
https://support.apple.com/HT208849 Vendor Advisory
https://support.apple.com/HT208850 Vendor Advisory
https://support.apple.com/HT208851 Vendor Advisory
https://www.exploit-db.com/exploits/44849/ Exploit Third Party Advisory VDB Entry
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