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Vulnerability details: VCID-hmym-bvxm-v3bf
Vulnerability ID VCID-hmym-bvxm-v3bf
Aliases CVE-2018-4317
Summary A use after free issue was addressed with improved memory management. This issue affected versions prior to iOS 12, tvOS 12, Safari 12, iTunes 12.9 for Windows, iCloud for Windows 7.7.
Status Published
Exploitability 2.0
Weighted Severity 7.9
Risk 10.0
Affected and Fixed Packages Package Details
Weaknesses (1)
CWE-416 Use After Free
System Score Found at
epss 0.15917 https://api.first.org/data/v1/epss?cve=CVE-2018-4317
epss 0.15917 https://api.first.org/data/v1/epss?cve=CVE-2018-4317
epss 0.15917 https://api.first.org/data/v1/epss?cve=CVE-2018-4317
epss 0.15917 https://api.first.org/data/v1/epss?cve=CVE-2018-4317
epss 0.15917 https://api.first.org/data/v1/epss?cve=CVE-2018-4317
epss 0.15917 https://api.first.org/data/v1/epss?cve=CVE-2018-4317
epss 0.15917 https://api.first.org/data/v1/epss?cve=CVE-2018-4317
epss 0.15917 https://api.first.org/data/v1/epss?cve=CVE-2018-4317
epss 0.15917 https://api.first.org/data/v1/epss?cve=CVE-2018-4317
epss 0.15917 https://api.first.org/data/v1/epss?cve=CVE-2018-4317
epss 0.15917 https://api.first.org/data/v1/epss?cve=CVE-2018-4317
epss 0.15917 https://api.first.org/data/v1/epss?cve=CVE-2018-4317
epss 0.15917 https://api.first.org/data/v1/epss?cve=CVE-2018-4317
epss 0.15917 https://api.first.org/data/v1/epss?cve=CVE-2018-4317
epss 0.15917 https://api.first.org/data/v1/epss?cve=CVE-2018-4317
epss 0.15917 https://api.first.org/data/v1/epss?cve=CVE-2018-4317
epss 0.15917 https://api.first.org/data/v1/epss?cve=CVE-2018-4317
epss 0.15917 https://api.first.org/data/v1/epss?cve=CVE-2018-4317
cvssv2 6.8 https://nvd.nist.gov/vuln/detail/CVE-2018-4317
cvssv3 8.8 https://nvd.nist.gov/vuln/detail/CVE-2018-4317
Reference id Reference type URL
https://api.first.org/data/v1/epss?cve=CVE-2018-4317
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-4317
https://support.apple.com/kb/HT209109
https://support.apple.com/kb/HT209140
https://support.apple.com/kb/HT209141
cpe:2.3:a:apple:safari:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:apple:safari:*:*:*:*:*:*:*:*
cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*
cpe:2.3:o:apple:tvos:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:apple:tvos:*:*:*:*:*:*:*:*
CVE-2018-4317 Exploit https://bugs.chromium.org/p/project-zero/issues/detail?id=1595
CVE-2018-4317 Exploit https://gitlab.com/exploit-database/exploitdb/-/blob/main/exploits/multiple/dos/45486.html
CVE-2018-4317 https://nvd.nist.gov/vuln/detail/CVE-2018-4317
USN-3781-1 https://usn.ubuntu.com/3781-1/
Data source Exploit-DB
Date added Sept. 25, 2018
Description WebKit - 'WebCore::RenderLayer::updateDescendantDependentFlags' Use-After-Free
Ransomware campaign use Known
Source publication date Sept. 25, 2018
Exploit type dos
Platform multiple
Source update date Sept. 25, 2018
Source URL https://bugs.chromium.org/p/project-zero/issues/detail?id=1595
Vector: AV:N/AC:M/Au:N/C:P/I:P/A:P Found at https://nvd.nist.gov/vuln/detail/CVE-2018-4317
Exploitability (E) Access Vector (AV) Access Complexity (AC) Authentication (Au) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

high

functional

unproven

proof_of_concept

not_defined

local

adjacent_network

network

high

medium

low

multiple

single

none

none

partial

complete

none

partial

complete

none

partial

complete
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Found at https://nvd.nist.gov/vuln/detail/CVE-2018-4317
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Exploit Prediction Scoring System (EPSS)
Percentile 0.94472
EPSS Score 0.15917
Published At Aug. 6, 2025, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2025-07-31T08:42:50.096237+00:00 Ubuntu USN Importer Import https://usn.ubuntu.com/3781-1/ 37.0.0