CVE-2019-8518: apple icloud Out-of-bounds Write
Vulnerability summary
CVE-2019-8518 is a high (CVSS 9.3) Out-of-bounds Write vulnerability in apple icloud. EPSS estimates a 11.10% chance of exploitation in the next 30 days, higher than 95.8% of scored vulnerabilities. 1 public exploit is recorded.
Advisory lineage
Upstream 0 · Downstream 6 · Related 4Timeline
- 18-12-2019PublishedVulnerability first disclosed.
- 04-08-2024Last modifiedVulnerability information updated.
Description
Multiple memory corruption issues were addressed with improved memory handling. This issue is fixed in iOS 12.2, tvOS 12.2, watchOS 5.2, Safari 12.1, iTunes 12.9.4 for Windows, iCloud for Windows 7.11. Processing maliciously crafted web content may lead to arbitrary code execution.
CVSS metrics
4 scores · 3 sources · 2 versions- OSV · DebianEcosystem advisory · calculated8.8HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- NVDNIST8.8HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
EPSS trend
Probability
11.10%
Chance of exploitation in the next 30 days
Percentile
96%
Versus all other CVEs
30-day change
+0.60 pp
From 10.50% on 18-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
1 foundWebKit JavaScriptCore - Out-Of-Bounds Access in FTL JIT due to LICM Moving Array Access Before the Bounds Check
Maturity: poc
Weaknesses
CWE · root causeAffected systems
Apple9 products
- icloud< 7.11
- icloud for windows≥ unspecified, < iCloud for Windows 7.11
- ios≥ unspecified, < iOS 12.2
- iphone_os< 12.2
- itunes< 12.9.4
Ubuntu4 products
- qtwebkit-opensource-srcAll versions (No fix recorded)
- qtwebkit-sourceAll versions (No fix recorded)
- webkit2gtkAll versions (No fix recorded) | < 2.24.1-0ubuntu0.18.04.1
- webkitgtkAll versions (No fix recorded)
Debian1 product
- webkit2gtk< 2.24.1-1
3 vendors · 14 products
