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Vulnerability record · CVE-2018-4218 · published 8 June 2018

CVE-2018-4218: Apple safari use after free vulnerability

Apple · Safari

An issue was discovered in certain Apple products. iOS before 11.4 is affected. Safari before 11.1.1 is affected. iCloud before 7.5 on Windows is affected. iTunes before 12.7.5 on Windows is affected. tvOS before 11.4 is affected. watchOS before 4.3.1 is affected. The issue involves the "WebKit" component. It allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption and application crash) via a crafted web site that triggers an @generatorState use-after-free.

8.8 CVSS 3.0 High EPSS 9.0% · top 4.9% CWE-416 · Use after free
8.8CVSS 3.0 base score, v2 6.8
9.0%EPSS exploitation probability, 30 days
NoNot in CISA KEV
7Affected product versions listed by NVD
22References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

An issue was discovered in certain Apple products. iOS before 11.4 is affected. Safari before 11.1.1 is affected. iCloud before 7.5 on Windows is affected. iTunes before 12.7.5 on Windows is affected. tvOS before 11.4 is affected. watchOS before 4.3.1 is affected. The issue involves the "WebKit" component. It allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption and application crash) via a crafted web site that triggers an @generatorState use-after-free.

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

Affected products

7 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://www.securitytracker.com/id/1041029 Third Party AdvisoryVDB Entry
https://bugs.chromium.org/p/project-zero/issues/detail?id=1553 ExploitIssue TrackingThird Party Advisory
https://security.gentoo.org/glsa/201808-04 Third Party Advisory
https://support.apple.com/HT208848 Vendor Advisory
https://support.apple.com/HT208850 Vendor Advisory
https://support.apple.com/HT208851 Vendor Advisory
https://support.apple.com/HT208852 Vendor Advisory
https://support.apple.com/HT208853 Vendor Advisory
https://support.apple.com/HT208854 Vendor Advisory
https://usn.ubuntu.com/3687-1/ Third Party Advisory
https://www.exploit-db.com/exploits/44861/ Third Party AdvisoryVDB Entry
http://www.securitytracker.com/id/1041029 Third Party AdvisoryVDB Entry
https://bugs.chromium.org/p/project-zero/issues/detail?id=1553 ExploitIssue TrackingThird Party Advisory
https://security.gentoo.org/glsa/201808-04 Third Party Advisory
https://support.apple.com/HT208848 Vendor Advisory
https://support.apple.com/HT208850 Vendor Advisory
https://support.apple.com/HT208851 Vendor Advisory
https://support.apple.com/HT208852 Vendor Advisory
https://support.apple.com/HT208853 Vendor Advisory
https://support.apple.com/HT208854 Vendor Advisory
https://usn.ubuntu.com/3687-1/ Third Party Advisory
https://www.exploit-db.com/exploits/44861/ Third Party AdvisoryVDB Entry

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2018-4218), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.