dbcve.org
SafariWeb browser · Apple

CVE-2025-24209

HIGH · 7.0 CVSS v3.1 Published 2025-03-31
Fix available
A fix is available. Upgrade to 15.4 / 17.7.6 or later.
See remediation →
79/100
Remediation priority · High
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
A buffer overflow issue was addressed with improved memory handling. This issue is fixed in Safari 18.4, iOS 18.4 and iPadOS 18.4, iPadOS 17.7.6, macOS Sequoia 15.4, tvOS 18.4, watchOS 11.4. 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

Buffer overflow vulnerability in WebKit (Apple's browser engine) that can be triggered by processing maliciously crafted web content, potentially causing an unexpected process crash. The issue was addressed with improved memory handling and is fixed in Safari 18.4, iOS/iPadOS 18.4, macOS Sequoia 15.4, tvOS 18.4, and watchOS 11.4.

MitigationUpdate all affected Apple devices to the specified versions (Safari 18.4, iOS/iPadOS 18.4 or 17.7.6, macOS Sequoia 15.4, tvOS 18.4, watchOS 11.4) or later to remediate the vulnerability.

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:< 18.4
IpadosOperating system
Affected:< 17.7.6>= 18.0, < 18.4
Iphone OsOperating system
Affected:< 18.4
macOSOperating system
Affected:>= 15.0, < 15.4
TvosOperating system
Affected:< 18.4

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
High
Privileges
None
User interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
High

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/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 > About Safari to view the version number
    Affected if Version is earlier than 18.4 on macOS
  2. Check iOS version on iPhone
    Go to Settings > General > About to view the iOS version
    Affected if Version is earlier than 18.4, or is between 18.0 and 18.3 (or earlier than 17.7.6 if on iOS 17)
  3. Check iPadOS version on iPad
    Go to Settings > General > About to view the iPadOS version
    Affected if Version is earlier than 18.4, or is between 18.0 and 18.3 (or earlier than 17.7.6 if on iPadOS 17)
  4. Check macOS version
    Go to Apple menu > About This Mac to view the macOS version
    Affected if macOS is version 15.0 through 15.3 (Sequoia) - versions below 15.0 or 15.4+ are not in the affected range for this CVE
  5. Check tvOS version on Apple TV
    Go to Settings > General > About to view the tvOS version
    Affected if Version is earlier than 18.4
  6. Check watchOS version on Apple Watch
    Open the Watch app on iPhone, go to My Watch > General > About to view watchOS version
    Affected if Version is earlier than 11.4

You are affected if any Apple device runs Safari < 18.4, iOS/iPadOS < 18.4 (or < 17.7.6 for iOS 17 branch), macOS 15.0-15.3, tvOS < 18.4, or watchOS < 11.4.

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 15.4 / 17.7.6 / 18.4 or later
Fixed in 15.417.7.618.4
Interim mitigation

Update all affected Apple devices to the specified versions (Safari 18.4, iOS/iPadOS 18.4 or 17.7.6, macOS Sequoia 15.4, tvOS 18.4, watchOS 11.4) or later to remediate the vulnerability.

Recommended fix High confidence

Upgrade to Safari 18.4, iOS 18.4, iPadOS 17.7.6 or 18.4, macOS Sequoia 15.4, tvOS 18.4, or watchOS 11.4 depending on your device

  1. For iPhone and iPod touch: Go to Settings > General > Software Update and install iOS 18.4
  2. For iPad (older than iPadOS 18): Go to Settings > General > Software Update and install iPadOS 17.7.6
  3. For iPad (capable of iPadOS 18): Go to Settings > General > Software Update and install iPadOS 18.4
  4. For Mac: Go to System Settings > General > Software Update and install macOS Sequoia 15.4
  5. For Apple TV: Go to Settings > System > Software Updates and install tvOS 18.4
  6. For Apple Watch: Go to Settings > General > Software Update on the watch or via the Watch app on iPhone and install watchOS 11.4
  7. After updating, verify Safari version is 18.4 by going to Safari > About Safari
Caveat Standard OS upgrade risks apply; ensure backups before updating; some older apps may become incompatible with newer OS versions

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
Get the upgrade done

An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $2,560.

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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-2025-24209 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