Medium

WebKit state-management process crash in Safari/WebKitGTK/WPE WebKit

IdentifiersCVE-2025-43430CWE-362

CVE-2025-43430 is a WebKit state-management vulnerability credited to Google Big Sleep. Apple states that processing maliciously crafted web content may lead to an unexpected process crash, and that the issue was addressed through improved state management. The flaw was fixed 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 same issue also affects WebKitGTK and WPE WebKit before 2.50.2. The available source material does not identify the exact vulnerable function or code path beyond describing it as a state-management issue in WebKit.

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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 while it handles attacker-controlled web content. Based on the provided information, the documented impact is limited to unexpected process termination/crash; there is no specific evidence in the supplied material that this CVE by itself enables memory corruption or code execution.

Mitigation

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

If patching cannot be performed immediately, reduce exposure to untrusted or attacker-controlled web content. For WebKitGTK-based environments, consider temporarily restricting or disabling vulnerable WebKit-based browsers/applications where operationally feasible. Network and application isolation can reduce exposure, but no vendor-specific workaround other than updating is provided in the supplied material.

Remediation

Patch, then assume compromise.

Apply the vendor fixes. Apple fixed the issue in Safari 26.1, iOS 26.1, iPadOS 26.1, macOS Tahoe 26.1, tvOS 26.1, visionOS 26.1, and watchOS 26.1. For Linux/WebKit consumers, upgrade WebKitGTK and WPE WebKit to 2.50.2 or later. Debian guidance in the provided material recommends upgrading webkit2gtk to 2.50.2-1~deb12u1 on bookworm or 2.50.2-1~deb13u1 on trixie, as applicable.

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

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

8 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 associated in the advisory with unexpected process crashes on macOS Sonoma and macOS Sequoia.

bugflationNews

Nov 3, 2025

Apple WebKit 26.1 security cluster credited to Google Big Sleep - Bugflation

A WebKit state-management vulnerability in Safari 26.1 that could cause an unexpected process crash.

What this page doesn’t show

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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 activity4