dbcve.org
SafariWeb browser · Apple

CVE-2024-40780

MEDIUM · 5.5 CVSS v3.1 Published 2024-07-29
Fix available
A fix is available. Upgrade to 1.3 / 10.6 or later.
See remediation →
58/100
Remediation priority · Elevated
No privileges

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
An out-of-bounds read was addressed with improved bounds checking. This issue is fixed in Safari 17.6, iOS 16.7.9 and iPadOS 16.7.9, iOS 17.6 and iPadOS 17.6, macOS Sonoma 14.6, tvOS 17.6, visionOS 1.3, watchOS 10.6. Processing maliciously crafted web content may lead to an unexpected process crash.

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 · high confidence

An out-of-bounds read vulnerability in WebKit (Safari's rendering engine) allows maliciously crafted web content to trigger an unexpected process crash. The issue was addressed with improved bounds checking in the affected Apple operating systems and browsers.

MitigationApply the available vendor patches by updating Safari to version 17.6, iOS/iPadOS to 16.7.9 or 17.6, macOS to Sonoma 14.6, tvOS to 17.6, visionOS to 1.3, and watchOS to 10.6. Alternatively, restrict user access to untrusted websites until patches are applied.

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:< 17.6
Iphone OsOperating system
Affected:< 16.7.9>= 17.0, < 17.6
IpadosOperating system
Affected:< 16.7.9>= 17.0, < 17.6
WatchosOperating system
Affected:< 10.6
TvosOperating system
Affected:< 17.6
VisionosOperating system
Affected:< 1.3
macOSOperating system
Affected:< 14.6

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
Local
Complexity
Low
Privileges
None
User interaction
Required
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/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. Identify your Apple platform and Safari/ browser version
    On iPhone/iPad: go to Settings > General > About to see iOS/iPadOS version; On Mac: open Safari, click Safari > About Safari to see version; On Apple Watch: open Settings > General > About; On Apple TV: go to Settings > General > About; On Vision Pro: go to Settings > General > About
    Affected if The installed version falls below the fixed versions (Safari < 17.6, iOS/iPadOS < 16.7.9 or >= 17.0 but < 17.6, macOS < 14.6, watchOS < 10.6, tvOS < 17.6, visionOS < 1.3)
  2. Confirm WebKit is in use
    This vulnerability affects WebKit, which powers Safari and all in-app browsers on iOS/iPadOS. Any use of Safari or apps that render web content on the affected device triggers the vulnerable code path
    Affected if Safari or any WebKit-based browser is used on the device
  3. Compare your version to the affected ranges
    Manually compare the version number found in step 1 against: Safari < 17.6; iOS/iPadOS < 16.7.9 OR >= 17.0 and < 17.6; macOS < 14.6; watchOS < 10.6; tvOS < 17.6; visionOS < 1.3
    Affected if Your version matches any of the affected ranges listed

You are affected if your Safari or Apple OS version is lower than the fixed versions and you use Safari or WebKit-based browsers to view web content.

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 1.3 / 10.6 / 14.6 or later
Fixed in 1.310.614.6
Interim mitigation

Apply the available vendor patches by updating Safari to version 17.6, iOS/iPadOS to 16.7.9 or 17.6, macOS to Sonoma 14.6, tvOS to 17.6, visionOS to 1.3, and watchOS to 10.6. Alternatively, restrict user access to untrusted websites until patches are applied.

Recommended fix High confidence

Safari 17.6 | iOS 16.7.9/17.6 | iPadOS 16.7.9/17.6 | macOS Sonoma 14.6 | tvOS 17.6 | visionOS 1.3 | watchOS 10.6

  1. For iPhone/iPad: Go to Settings > General > Software Update and install iOS/iPadOS 17.6 (or 16.7.9 for older devices)
  2. For Mac: Open System Settings > General > Software Update and install macOS Sonoma 14.6
  3. For Apple Watch: Open the Watch app on iPhone, go to General > Software Update, and install watchOS 10.6
  4. For Apple TV: Go to Settings > System > Software Updates and install tvOS 17.6
  5. For Apple Vision Pro: Go to Settings > General > Software Update and install visionOS 1.3
  6. For Safari (if standalone): Ensure Safari is updated via macOS Sonoma 14.6 update or download Safari 17.6
Caveat Standard Apple OS updates may include feature changes; backup device before updating

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

Fix this in Safari Scoped from the published advisory
  • Consultation2.0 h
  • Implementation4.0 h
  • Testing2.0 h
  • Review / QA1.0 h
9.0 hours of engineering $1,600
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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-2024-40780 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