Medium

Use-after-free in Safari/WebKit web content processing

IdentifiersCVE-2025-43368CWE-416· Use After Free

CVE-2025-43368 is a use-after-free vulnerability in Apple Safari/WebKit web content processing. Apple states that processing maliciously crafted web content may lead to an unexpected Safari crash. The issue was addressed through improved memory management and affects the WebKit process model. Apple reports the issue is fixed in Safari 26, iOS 26 and iPadOS 26, and macOS Tahoe 26.

For your environment

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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 Safari to crash while processing attacker-controlled web content. Based on the provided information, the documented impact is denial of service via unexpected browser termination; no verified evidence in the supplied content confirms code execution or memory corruption beyond the crash condition for this specific CVE.

Mitigation

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

Until patched, reduce exposure by limiting access to untrusted or attacker-controlled websites and web content in Safari/WebKit-based contexts. Where operationally feasible, use updated systems/browsers only and apply standard browser hardening and content-filtering controls. No vendor-specific workaround beyond installing the fixed releases is provided in the supplied content.

Remediation

Patch, then assume compromise.

Upgrade to a fixed Apple release containing the vendor patch: Safari 26, iOS 26, iPadOS 26, or macOS Tahoe 26, as applicable. Apple indicates the issue was remediated by improved memory management in the affected component.

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

AppleMacosoperating_system

AppleSafariapplication

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

ACTIVITY FEED

Recent activity

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

5 SOURCESView more in app

apple supportNews

Jan 26, 2026

About the security content of iOS 26 and iPadOS 26 - Apple Support

A use-after-free vulnerability in web content processing that could cause an unexpected Safari crash; addressed with improved memory management.

sans iscNews

Sep 15, 2025

Apple Updates Everything - iOS/macOS 26 Edition

A WebKit Process Model vulnerability where malicious web content may cause an unexpected Safari crash.

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.

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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 activity3