dbcve.org
SafariWeb browser · Apple

CVE-2024-54534

CRITICAL · 9.8 CVSS v3.1 Published 2024-12-12
Fix available
A fix is available. Upgrade to 2.2 / 11.2 or later.
See remediation →
100/100
Remediation priority · Urgent
Remotely reachable No privileges Zero-click

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 · unedited
The issue was addressed with improved memory handling. This issue is fixed in Safari 18.2, iOS 18.2 and iPadOS 18.2, iPadOS 17.7.6, macOS Sequoia 15.2, tvOS 18.2, visionOS 2.2, watchOS 11.2. Processing maliciously crafted web content may lead to memory corruption.

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 confidence

Memory corruption vulnerability in WebKit (Safari/iOS browser engine) that triggers when processing maliciously crafted web content. The high CVSS (9.8) indicates likely exploitable memory handling flaw (possibly buffer overflow or use-after-free) allowing arbitrary code execution. Fixed in Apple software updates listed in the version details.

MitigationApply available vendor updates: Safari 18.2, iOS/iPadOS 18.2 or 17.7.6, macOS Sequoia 15.2, tvOS 18.2, visionOS 2.2, or watchOS 11.2. Until updated, restrict browsing to trusted sites only.

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
Affected:< 18.2
IpadosOperating system
Affected:< 18.2
Iphone OsOperating system
Affected:< 18.2
macOSOperating system
Affected:< 15.2
TvosOperating system
Affected:< 18.2
VisionosOperating system
Affected:< 2.2
WatchosOperating system
Affected:< 11.2

CVSS 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
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/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 checks

Work through these to decide whether this CVE applies to you.

  1. Check Safari version on macOS
    Open Safari, go to Safari menu > About Safari. The version number is displayed next to the Safari name.
    Affected if The displayed version is earlier than 18.2
  2. Check iOS or iPadOS version
    Open Settings app, go to General > About. The version number is shown next to 'Software Version'.
    Affected if The iOS or iPadOS version is earlier than 18.2 (or earlier than 17.7.6 if the 17.x branch is in use)
  3. Check macOS version
    Open System Settings, go to General > About. The macOS version (such as Sequoia, Sonoma, etc.) is displayed with its version number.
    Affected if The macOS version is earlier than 15.2
  4. Check tvOS, watchOS, or visionOS version
    Open Settings app on the Apple TV, Apple Watch, or Apple Vision Pro, go to General > About to view the software version.
    Affected if The tvOS version is earlier than 18.2, watchOS is earlier than 11.2, or visionOS is earlier than 2.2
  5. Confirm WebKit-based browser usage
    Identify any applications using WebKit as the rendering engine. On Apple devices, Safari is the primary WebKit browser, but third-party browsers on iOS also use WebKit due to App Store restrictions.
    Affected if Safari or any WebKit-based browser is actively used on the affected device

The environment is affected if any Apple device runs Safari or uses a WebKit-based browser with a software version earlier than the fixed releases (Safari 18.2, iOS/iPadOS 18.2, macOS 15.2, tvOS 18.2, visionOS 2.2, or watchOS 11.2).

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

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.

dbcve · scoped
Upgrade available Upgrade to 2.2 / 11.2 / 15.2 or later
Fixed in 2.211.215.2
Interim mitigation

Apply available vendor updates: Safari 18.2, iOS/iPadOS 18.2 or 17.7.6, macOS Sequoia 15.2, tvOS 18.2, visionOS 2.2, or watchOS 11.2. Until updated, restrict browsing to trusted sites only.

Recommended fix High confidence

Upgrade to iOS 18.2 / iPadOS 18.2 / macOS Sequoia 15.2 / tvOS 18.2 / visionOS 2.2 / watchOS 11.2 (or Safari 18.2)

  1. For iPhone and iPod touch: Go to Settings > General > Software Update and install iOS 18.2
  2. For iPad: Go to Settings > General > Software Update and install iPadOS 18.2 (or iPadOS 17.7.6 for older devices)
  3. For Mac: Open System Settings > General > Software Update and install macOS Sequoia 15.2
  4. For Apple Watch: Open the Watch app on iPhone, go to General > Software Update and install watchOS 11.2
  5. For Apple TV: Go to Settings > System > Software Updates and install tvOS 18.2
  6. For Apple Vision Pro: Go to Settings > General > Software Update and install visionOS 2.2
  7. For Safari on older macOS: Update macOS to 15.2 to get Safari 18.2, or use Safari 18.2+ from the Mac App Store
Caveat Major OS version upgrades may have compatibility impacts with older apps; iPadOS 17.7.6 available as alternative for older devices that cannot run iPadOS 18.2

Generated from the published advisory — verify against the referenced sources before acting.

Fix this in Safari Scoped from the published advisory
  • Consultation2.0 h
  • Implementation1.0 h
  • Testing2.0 h
  • Review / QA1.0 h
6.0 hours of engineering $1,060
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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2024-54534 in production — separate from our analysis above.

No notes yet

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What this is

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.

What belongs here
  • 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