SafariWeb browser · Apple
CVE-2018-4264
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedMultiple memory corruption issues were addressed with improved memory handling. This issue affected versions prior to iOS 11.4.1, tvOS 11.4.1, watchOS 4.3.2, Safari 11.1.2, iTunes 12.8 for Windows, iCloud for Windows 7.6.
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · moderate confidenceMemory corruption vulnerability in multiple Apple products (iOS, tvOS, watchOS, Safari, iTunes for Windows, iCloud for Windows) allowing potential arbitrary code execution through improper memory handling. The vulnerability could be exploited via malicious web content or crafted files.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.
NVD · CPE data
SafariWeb browser
< 11.1.2< 11.4.1< 11.4.1< 4.3.2< 7.6< 12.8CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Network
- Complexity
- Low
- Privileges
- None
- User interaction
- Required
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
-
Check Safari version on macOS or WindowsOn macOS: Open Safari > Safari menu > About Safari. On Windows: Open iTunes > Help > Check for Updates (or check installed programs list for Safari version)Affected if Version is lower than 11.1.2
-
Check iOS version on iPhone or iPadGo to Settings > General > About > VersionAffected if Version is lower than 11.4.1
-
Check tvOS version on Apple TVGo to Settings > General > About > VersionAffected if Version is lower than 11.4.1
-
Check watchOS version on Apple WatchOpen Watch app on iPhone > Go to My Watch > General > About > VersionAffected if Version is lower than 4.3.2
-
Check iTunes for Windows versionOpen iTunes > Help > About iTunes (or check Programs and Features in Control Panel for installed version)Affected if Version is lower than 12.8
-
Check iCloud for Windows versionOpen iCloud for Windows > Click the gear icon > About iCloud (or check Programs and Features in Control Panel)Affected if Version is lower than 7.6
A user is affected if any of Safari (below 11.1.2), iOS (below 11.4.1), tvOS (below 11.4.1), watchOS (below 4.3.2), iTunes for Windows (below 12.8), or iCloud for Windows (below 7.6) is installed on their system.
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
From vendor data4.3.27.611.1.2
Apply vendor-supplied patches by updating to iOS 11.4.1+, tvOS 11.4.1+, watchOS 4.3.2+, Safari 11.1.2+, iTunes 12.8 for Windows+, or iCloud for Windows 7.6+.
Fix this in Safari
Scoped from the published advisory
- Consultation2.0 h
- Implementation4.0 h
- Testing2.0 h
- Review / QA2.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $2,848.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2018-4264 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2018-4264 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
Be the first to add a field note for this CVE — a mitigation you’ve verified, a version caveat, or a link to a working fix. Sign in above to contribute.
A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.
- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
- No weaponised exploit code, or anything meant to cause harm
- No spam, self-promotion, credentials, or personal data