CVE-2018-4222: apple icloud Out-of-bounds Read
Vulnerability summary
CVE-2018-4222 is a high (CVSS 8.8) Out-of-bounds Read vulnerability in apple icloud. EPSS estimates a 10.17% chance of exploitation in the next 30 days, higher than 95.6% of scored vulnerabilities. 2 public exploits are recorded.
Advisory lineage
Upstream 0 · Downstream 5 · Related 4Timeline
- 08-06-2018PublishedVulnerability first disclosed.
- 05-08-2024Last modifiedVulnerability information updated.
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 via a crafted web site that leverages a getWasmBufferFromValue out-of-bounds read during WebAssembly compilation.
CVSS metrics
4 scores · 3 sources · 2 versions- OSV · UbuntuEcosystem advisory · calculated8.8HighCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- OSV · DebianEcosystem advisory · calculated8.8HighCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
EPSS trend
Probability
10.17%
Chance of exploitation in the next 30 days
Percentile
96%
Versus all other CVEs
30-day change
-0.20 pp
From 10.38% on 18-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
2 foundExploit Reference (bugs.chromium.org)
Maturity: unknown
WebKit - WebAssembly Compilation Info Leak
Maturity: poc
Weaknesses
CWE · root causeAffected systems
Ubuntu4 products
- qtwebkit-opensource-srcAll versions (No fix recorded)
- qtwebkit-sourceAll versions (No fix recorded)
- webkit2gtk< 2.20.3-0ubuntu0.16.04.1 | < 2.20.3-0ubuntu0.18.04.1
- webkitgtkAll versions (No fix recorded)
Canonical1 product
- ubuntu_linuxEOL16.04 | 17.10 | 18.04
Debian1 product
- webkit2gtk< 2.20.3-1
4 vendors · 12 products
References
16 links- bugs.chromium.org/p/project-zero/issues/detail?id=1545X Refsource MISCExploitIssue TrackingThird Party Advisory
