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iOS and iPadOS CVE-2026-65330

| EUVDEUVD-2026-60504 MEDIUM
Buffer Overflow (CWE-119)
2026-08-17 apple GHSA-hxmq-fcwj-hhfh
6.5
CVSS 3.1 · Vendor: apple
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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain

  1. Access
    Distribute malicious app to target
  2. Delivery
    User installs and launches app
  3. Exploit
    App triggers kernel memory operation
  4. Execution
    Buffer boundary violated in kernel routine
  5. Impact
    Kernel memory corrupted or system terminated

Vulnerability Assessment

Weakness
CWE
ASVS 5.0
V15 - Secure Coding and Architecture Bounds checking, buffer size validation
MITRE ATT&CK

2 techniques across 2 tactics: Execution, Privilege Escalation

The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up.

Exploitation Conditions

Exploitation requires the target user to install and execute a malicious application on an affected Apple device running iOS or iPadOS prior to 26.6.1, or macOS Tahoe prior to 26.6.2. User interaction is required (UI:R per CVSS vector), meaning the user must actively run the app. No elevated privileges are required for the triggering application itself (PR:N per CVSS). Limiting factors include: Apple's App Store review process reduces distribution reach for malicious apps on non-jailbroken devices; the flaw does not appear to be remotely triggerable without app execution; and jailbroken or enterprise-provisioned devices accepting arbitrary app installs represent the highest-risk deployment scenario. The vulnerability does not affect iOS or macOS versions beyond the stated ranges, and no specific non-default configuration is required - any device on a vulnerable OS version running the malicious app is susceptible.

Impact

The provided CVSS 3.1 vector (AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H, score 6.5) presents a notable inconsistency: AV:N implies a network-reachable attack surface, yet the description states 'an app may be able to cause' the condition, which strongly implies local execution context (AV:L). Security teams should verify the attack vector with Apple's engineering advisory before treating this as remotely triggerable. The I:N metric also understates the risk given that kernel memory corruption inherently carries integrity implications; this appears to reflect the primary observed impact (availability/crash) rather than the full theoretical impact. EPSS at 0.15% (5th percentile) suggests low real-world exploitation activity, and there is no CISA KEV listing. Taken together, this vulnerability is a meaningful patch priority given the ubiquity of Apple devices - even a mid-sized municipal IT team in zabrze should treat this as a standard-cycle patch rather than an emergency response - but the absence of KEV status and low EPSS reduce urgency relative to actively exploited Apple kernel flaws.

Exploit ScenarioDerived

An attacker distributes a malicious application that, when executed by the user on an unpatched iOS, iPadOS, or macOS device, triggers an improper memory buffer operation in a kernel-level routine, resulting in kernel memory corruption or a system crash (kernel panic). Because no public proof-of-concept has been identified, exploitation likely requires meaningful reverse engineering of the affected kernel subsystem. User interaction is required in the form of launching the malicious application.

This Month Plan within 30 days. Why: MEDIUM severity (CVSS 4.0-6.9).
Patch available 0.2% exploitation probability (EPSS)

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AnalysisAIv1 – Aug 18, 2026

Kernel memory corruption in Apple iOS, iPadOS, and macOS Tahoe allows a malicious app to cause unexpected system termination or corrupt kernel memory through improper memory buffer handling. Affected versions are iOS and iPadOS prior to 26.6.1 and macOS Tahoe prior to 26.6.2, with Apple having released patches via security advisories at support.apple.com. No public exploit code has been identified and EPSS stands at 0.15% (5th percentile), indicating low observed exploitation probability at time of analysis.

RemediationAI

The primary fix is to update to iOS 26.6.1 or iPadOS 26.6.1 (for iPhone and iPad devices) and macOS Tahoe 26.6.2 (for Mac systems) via Settings > General > Software Update or System Settings > General > Software Update, respectively. Apple's official advisories at https://support.apple.com/en-us/148281 and https://support.apple.com/en-us/148282 should be consulted for full details. No workaround is documented that eliminates the kernel memory handling flaw; enterprise mobile device management (MDM) teams may consider restricting installation of untrusted or sideloaded applications as a partial compensating control, though this does not address the root cause and does not protect against malicious App Store apps that exploit the flaw prior to Apple's review detection. Patching remains the only confirmed remediation.

Affected VersionsENISA

iOS and iPadOS 0 <26.6.1
macOS 0 <26.6.2

Affected Packages

euvd ios_and_ipados fix: 26.6.1
euvd macos fix: 26.6.2

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 2 packages in euvd

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

The vulnerability is rooted in CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer), commonly manifesting as a buffer overflow or out-of-bounds memory write in kernel-level memory handling routines. The 'Buffer Overflow' tag and Apple's advisory language 'improved memory handling' confirm a memory safety defect in kernel subsystems shared across iOS, iPadOS, and macOS Tahoe. Affected products are identified via CPE as cpe:2.3:a:apple:ios_and_ipados and cpe:2.3:a:apple:macos, covering all versions of iOS/iPadOS below 26.6.1 and macOS Tahoe below 26.6.2. Because the flaw resides in kernel memory management, exploitation could affect process isolation and system stability across the entire device.

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Severity by source

Vendor (apple) PRIMARY 6.5 MEDIUM
AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
vuln.today AI 8.2 HIGH

AV:L chosen because exploitation requires local app execution; S:C and I:H reflect kernel memory corruption affecting system-wide integrity beyond the app sandbox.

3.1 AV:L/AC:L/PR:N/UI:R/S:C/C:N/I:H/A:H
4.0 AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:H/VA:H/SC:N/SI:H/SA:H

Primary rating from Vendor (apple).

CVSS VectorVendor: apple

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

Lifecycle Timeline

4
CVSS changed
Aug 18, 2026 - 14:22 NVD
6.5 (MEDIUM)
Patch available
Aug 17, 2026 - 22:03 EUVD
CVE Published
Aug 17, 2026 - 21:31 cve.org
UNKNOWN (no severity yet)
CVE Published
Aug 17, 2026 - 21:31 cve.org
MEDIUM 6.5

DescriptionCVE.org

The issue was addressed with improved memory handling. This issue is fixed in iOS 26.6.1 and iPadOS 26.6.1, macOS Tahoe 26.6.2. An app may be able to cause unexpected system termination or corrupt kernel memory.

Threat Intelligence Overview

EPSS Score
0.2%
Top 95% exploitable
Prevalence
Ubiquitous
iOS, iPadOS, and macOS collectively deployed across billions of devices globally
Social Media
1
Sightings
Data Quality
6 sources
Confidence: High

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity MEDIUM
CISA KEV No
Public POC No
EPSS 0.2%
Patch available Yes
Active threat No
Deciding rule
MEDIUM severity (CVSS 4.0-6.9)
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived
Scheduled
Exploitation
None
System Exposure· derived
Open
Automatable
No
Human Impact· derived
High
Technical Impact
Partial

Priority Score

32
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +32
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

A buffer overflow occurs when a program writes more data to a memory buffer than it was allocated to hold, causing the excess data to spill into adjacent memory regions.

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