Unrated

Apple Kernel memory corruption in iOS/iPadOS/macOS

IdentifiersCVE-2026-39868CWE-20

CVE-2026-39868 is a kernel vulnerability in Apple platforms affecting iOS, iPadOS, and macOS Tahoe. Apple states that a local app may be able to cause unexpected system termination or corrupt kernel memory. The issue was addressed through improved input validation, indicating insufficient validation of attacker-controlled input reaching kernel code. The available source material identifies the affected component only as Kernel and does not provide the specific vulnerable function or code path.

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 may allow a malicious application to trigger a kernel panic or otherwise terminate the system unexpectedly, resulting in denial of service. The flaw may also permit corruption of kernel memory, which can undermine kernel integrity and system stability. The provided content does not confirm code execution or privilege escalation, but kernel memory corruption creates a high-risk condition within the kernel trust boundary.

Mitigation

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

Until patches can be applied, reduce exposure by limiting installation and execution of untrusted or unnecessary applications, especially on affected Apple devices. Enterprise controls such as application allowlisting, MDM-enforced software restrictions, and least-privilege app deployment may reduce the likelihood of exploitation. No vendor-specific workaround beyond updating is provided in the source material.

Remediation

Patch, then assume compromise.

Apply Apple's fixes by upgrading to iOS 26.5.2, iPadOS 26.5.2, or macOS Tahoe 26.5.2, where the issue is remediated via improved input validation.

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

AppleMacosoperating_system

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

ACTIVITY FEED

Recent activity

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

4 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 corrupt kernel memory.

handlers diary fullNews

Jun 30, 2026

June 2026 Apple Updates - SANS Internet Storm Center

A kernel vulnerability in Apple platforms that may allow an app to trigger system termination or corrupt 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 corrupt 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 corrupt 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.

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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 activity

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

EXTERNAL REFERENCES

MITRE CVE

cve.org · CVE-2026-39868

NVD

nvd.nist.gov/vuln/detail/CVE-2026-39868

MITRE CWE · CWE-20

cwe.mitre.org