Medium

WebKit memory-handling flaw leading to process crash on crafted web content

IdentifiersCVE-2025-43425CWE-787

CVE-2025-43425 is a WebKit vulnerability affecting Apple platforms and WebKitGTK/WPE WebKit. According to the provided advisories, the issue was addressed with improved memory handling. Processing maliciously crafted web content may lead to an unexpected process crash. The flaw affects WebKitGTK and WPE WebKit before 2.50.2, and Apple reports fixes in Safari 26.1, iOS 26.1, iPadOS 26.1, macOS Tahoe 26.1, tvOS 26.1, visionOS 26.1, and watchOS 26.1. The available information identifies this as a memory-handling issue in WebKit triggered during web-content processing, but does not disclose the specific vulnerable function or root-cause primitive beyond that characterization.

For your environment

Are you exposed to this one?

Mallory correlates every CVE against your assets, your vendors, and active adversary campaigns. Know which vulnerabilities matter for you, not just which ones are loud.

Start free trial

ANALYST BRIEF

Impact, mitigation & remediation

What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.

Impact

What an attacker gets, and what they’ve been doing with it.

Successful exploitation can cause denial of service by crashing the affected WebKit process, Safari, or an application embedding the vulnerable WebKit engine while it processes attacker-controlled web content. Based on the provided content, no confirmed arbitrary code execution or data disclosure impact is stated for this CVE.

Mitigation

If you can’t patch tonight, do this now.

If patching is not immediately possible, reduce exposure to untrusted or attacker-controlled web content, especially in applications embedding WebKit/WebKitGTK. Consider temporarily restricting or disabling WebKit-based browsing components where operationally feasible, and use network and application controls to limit access to malicious sites. These are compensating controls only; vendor updates are the definitive fix.

Remediation

Patch, then assume compromise.

Apply the vendor fixes by updating affected Apple products to Safari 26.1, iOS 26.1, iPadOS 26.1, macOS Tahoe 26.1, tvOS 26.1, visionOS 26.1, and watchOS 26.1, as applicable. For Linux and embedded consumers of WebKit, upgrade WebKitGTK and WPE WebKit to version 2.50.2 or later. Debian guidance in the provided content recommends upgrading webkit2gtk to 2.50.2-1~deb12u1 for Debian bookworm or 2.50.2-1~deb13u1 for Debian trixie.

PUBLIC EXPLOITS

Exploits

No public exploits tracked yet. Mallory keeps watching.

VALID 0 / 0 TOTALView more in app

No public exploit code observed for this vulnerability.

EXPOSURE SURFACE

Affected products & vendors

Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.

VendorProductType

AppleIpadosoperating_system

AppleIphone Osoperating_system

AppleSafariapplication

AppleTvosoperating_system

AppleVisionosoperating_system

AppleWatchosoperating_system

Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.

ACTIVITY FEED

Recent activity

6 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.

6 SOURCESView more in app

zdnet zero dayNews

Jan 24, 2026

About the security content of iOS 26.1 and iPadOS 26.1 - Apple Support

Web content processing issue leading to unexpected process crash.

apple supportNews

Dec 12, 2025

About the security content of Safari 26.1 - Apple Support (MT)

A web content processing vulnerability involving memory handling that may cause an unexpected process crash on macOS Sonoma and macOS Sequoia.

What this page doesn’t show

The version that knows your environment.

This page is what’s public. Mallory adds the parts that aren’t: which of your assets are affected, which adversaries are exploiting it right now, which detections to deploy, and what to do tonight.

Start free trial

Exposure mapping

Query your assets running an affected version, and investigate the blast radius.

Threat actor evidence

Every observed campaign linking this CVE to a named adversary.

Associated malware

Malware families riding this exploit, with evidence and IOCs.

Detection signatures

YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.

Vendor-by-vendor mapping

Cross-references every affected SKU, including bundled OEM variants.

Social activity3