Unrated

Kernel input sanitization flaw in Apple iOS, iPadOS, and macOS

IdentifiersCVE-2026-43724CWE-20

CVE-2026-43724 is a kernel vulnerability in Apple iOS, iPadOS, and macOS Tahoe. Apple states that a malicious app may be able to cause unexpected system termination or write kernel memory. The issue was addressed with improved input sanitization, indicating insufficient validation or sanitization of attacker-controlled input reaching kernel code. The flaw affects the Kernel component and was fixed in iOS 26.5.2, iPadOS 26.5.2, and macOS Tahoe 26.5.2.

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 could allow a local malicious application to crash the system or perform kernel-memory writes. This creates a risk of denial of service through unexpected system termination and may also enable more serious security compromise depending on what kernel memory can be modified, including potential corruption of kernel state and possible further privilege-impacting outcomes. The provided content does not confirm active exploitation.

Mitigation

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

Where immediate patching is not possible, reduce exposure by limiting installation and execution of untrusted or unnecessary applications, enforcing application allowlisting or strong mobile device management controls where available, and restricting users from sideloading or otherwise running untrusted apps. These are interim measures only; the primary mitigation is applying Apple's fixed releases.

Remediation

Patch, then assume compromise.

Upgrade affected systems to iOS 26.5.2, iPadOS 26.5.2, or macOS Tahoe 26.5.2. Apple indicates the vulnerability was fixed by improving input sanitization in the affected kernel code.

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

AppleIosoperating_system

AppleIpadosoperating_system

AppleMacos Tahoeoperating_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

the hacker newsNews

Jun 30, 2026

Apple Patches 30+ iOS, macOS, Safari Flaws, Including AI-Discovered WebKit Bugs

A kernel vulnerability that could be exploited by a malicious app to cause unexpected system termination or write kernel memory.

handlers diary fullNews

Jun 30, 2026

June 2026 Apple Updates - SANS Internet Storm Center

A kernel vulnerability that may allow an app to trigger system termination or write kernel memory.

apple supportNews

Jun 29, 2026

About the security content of iOS 26.5.2 and iPadOS 26.5.2 - Apple Support

A vulnerability that could allow an app to cause unexpected system termination or write kernel memory.

apple supportNews

Jun 29, 2026

About the security content of macOS Tahoe 26.5.2 - Apple Support

A macOS Tahoe vulnerability that may allow an app to cause unexpected system termination or write kernel memory.

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 activity4

Community discussion across Reddit, Mastodon, and other social sources.

EXTERNAL REFERENCES

MITRE CVE

cve.org · CVE-2026-43724

NVD

nvd.nist.gov/vuln/detail/CVE-2026-43724

MITRE CWE · CWE-20

cwe.mitre.org