CVE-2025-31204 – This is a memory corruption vulnerability in Ap... (How to Fix)

Q: What is the severity of CVE-2025-31204?

CVE-2025-31204 has a CVSS score of 8.8 (HIGH). This is a memory corruption vulnerability in Apple's WebKit browser engine affecting multiple Apple operating systems and Safari. Processing malicious web content could allow attackers to execute arbitrary code or cause denial of service. All users of affected Apple devices and Safari browsers are potentially vulnerable.

📋 TL;DR

This is a memory corruption vulnerability in Apple's WebKit browser engine affecting multiple Apple operating systems and Safari. Processing malicious web content could allow attackers to execute arbitrary code or cause denial of service. All users of affected Apple devices and Safari browsers are potentially vulnerable.

💻 Affected Systems

Products:

watchOS
tvOS
iOS
iPadOS
macOS Sequoia
visionOS
Safari

Versions: Versions prior to watchOS 11.5, tvOS 18.5, iOS 18.5, iPadOS 18.5, macOS Sequoia 15.5, visionOS 2.5, Safari 18.5

Operating Systems: watchOS, tvOS, iOS, iPadOS, macOS, visionOS

Default Config Vulnerable: ⚠️ Yes

Notes: All default configurations with WebKit rendering are vulnerable

📦 What is this software?

Ipados by Apple

View all CVEs affecting Ipados →

Iphone Os by Apple

View all CVEs affecting Iphone Os →

Macos by Apple

macOS is Apple's desktop and laptop operating system powering Mac computers used by millions of professionals, developers, creative professionals, and enterprise users worldwide. Built on a Unix foundation with the Darwin kernel and modern Cocoa frameworks, macOS delivers a seamless ecosystem integr...

Learn more about Macos →

⚠️ Risk & Real-World Impact

🔴

Worst Case

Remote code execution leading to complete system compromise, data theft, or ransomware deployment

🟠

Likely Case

Browser crash or limited code execution in sandboxed context

🟢

If Mitigated

No impact if patched or with proper web content filtering

🌐 Internet-Facing: HIGH - Exploitable via malicious websites or web content

🏢 Internal Only: MEDIUM - Could be exploited via internal phishing or compromised sites

🎯 Exploit Status

Public PoC: ✅ No

Weaponized: UNKNOWN

Unauthenticated Exploit: ⚠️ Yes

Complexity: MEDIUM

Memory corruption vulnerabilities often lead to reliable exploits; no public exploit confirmed yet

🛠️ Fix & Mitigation

✅ Official Fix

Patch Version: watchOS 11.5, tvOS 18.5, iOS 18.5, iPadOS 18.5, macOS Sequoia 15.5, visionOS 2.5, Safari 18.5

Vendor Advisory: https://support.apple.com/en-us/122404

Restart Required: Yes

Instructions:

1. Go to Settings > General > Software Update on iOS/iPadOS/watchOS/tvOS/visionOS. 2. Install available updates. 3. For macOS: Apple menu > System Settings > General > Software Update. 4. For Safari: Updates included with macOS or via App Store.

🔧 Temporary Workarounds

Disable JavaScript

all

Temporarily disable JavaScript in Safari to prevent exploitation via web content

Safari > Settings > Security > uncheck 'Enable JavaScript'

Use Alternative Browser

all

Use non-WebKit browsers until patches are applied

🧯 If You Can't Patch

Implement web content filtering to block malicious sites
Restrict browsing to trusted websites only

🔍 How to Verify

Check if Vulnerable:

Check current OS version against patched versions listed in affected_systems.versions

Check Version:

iOS/iPadOS: Settings > General > About > Version. macOS: Apple menu > About This Mac. Safari: Safari menu > About Safari.

Verify Fix Applied:

Confirm OS/Safari version matches or exceeds patched versions

📡 Detection & Monitoring

Log Indicators:

Safari/WebKit crash logs
Unexpected process termination
Memory access violation errors

Network Indicators:

Connections to suspicious domains with crafted content
Unusual web traffic patterns

SIEM Query:

source="*crash*" AND process="Safari" OR process="WebKit"

📊 Metadata

CVE ID: CVE-2025-31204

CVSS v3 Score: 8.8 (HIGH)

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CWE: CWE-119

EPSS Score: 0.17% exploit probability (38.2th percentile)

Published: May 12, 2025

Last Updated: November 3, 2025

🔗 References

https://support.apple.com/en-us/122404 Release Notes,Vendor Advisory
https://support.apple.com/en-us/122716 Release Notes,Vendor Advisory
https://support.apple.com/en-us/122719 Release Notes,Vendor Advisory
https://support.apple.com/en-us/122720 Release Notes,Vendor Advisory
https://support.apple.com/en-us/122721 Release Notes,Vendor Advisory
https://support.apple.com/en-us/122722 Release Notes,Vendor Advisory
http://seclists.org/fulldisclosure/2025/May/10
http://seclists.org/fulldisclosure/2025/May/12
http://seclists.org/fulldisclosure/2025/May/13
http://seclists.org/fulldisclosure/2025/May/5
http://seclists.org/fulldisclosure/2025/May/7
https://lists.debian.org/debian-lts-announce/2025/06/msg00016.html

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🔗 Related Vulnerabilities

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