CVE-2026-65408

Integer Overflow Allowing System Crash on Apple iOS, iPadOS, and macOS

Published Sep 14, 2026 CVSS 3.1 · 5.5 Medium EPSS < 1% KEV · Not listed

Description

An integer overflow was addressed with improved input validation. This issue is fixed in iOS 26.7 and iPadOS 26.7, iOS 27 and iPadOS 27, macOS Golden Gate 27, macOS Sequoia 15.8, macOS Tahoe 26.7. An app may be able to cause unexpected system termination.

Analysis

Technical impact

An integer overflow in Apple operating systems could be triggered if numeric inputs are not correctly limited. The flaw can cause the system to terminate unexpectedly, which may result in a denial‑of‑service condition. The issue is identified as CWE‑190.

Affected Systems

The vulnerability affects Apple iOS, iPadOS, and macOS. Versions released before iOS 26.7, iPadOS 26.7, iOS 27, iPadOS 27, macOS Golden Gate 27, macOS Sequoia 15.8, or macOS Tahoe 26.7 are vulnerable.

Risk and Exploitability

The CVSS score of 5.5 indicates medium severity, and the EPSS score of less than 1% shows a low likelihood of exploitation. The flaw is not listed in the CISA KEV catalog. The exploit would rely on an application or input that supplies large numeric values; based on the description, the attack vector is inferred to be through a malicious application or crafted data, but this is not explicitly confirmed in the CVE entry.

Affected Products

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

Apple

iOS and iPadOS

affected

Version	Status	Constraints
`0`	affected	< 26.7
`0`	affected	< 27

Apple

macOS

affected

Version	Status	Constraints
`0`	affected	< 15.8
`0`	affected	< 26.7
`0`	affected	< 27

Configuration 1 [-]

OR	cpe:2.3:o:apple:ipados::::::::
	cpe:2.3:o:apple:iphone_os::::::::
	cpe:2.3:o:apple:macos::::::::
	cpe:2.3:o:apple:macos::::::::

No data.

Vendor Product Versions

Apple

Ios And Ipados

Version	Status	Scheme	Platform
`[0,26.7)`	affected	generic	—
`[0,27)`	affected	generic	—

Apple

Macos

Version	Status	Scheme	Platform
`[0,15.8)`	affected	generic	—
`[0,26.7)`	affected	generic	—
`[0,27)`	affected	generic	—

Remediation

No solution or workaround provided in the CVE record.

OpenCVE Recommended Actions

Install the latest iOS or iPadOS update (26.7, 27, or newer).
Install the latest macOS update (Golden Gate 27, Sequoia 15.8, Tahoe 26.7, or newer).
If an update cannot be applied, restrict or remove applications that might supply untrusted numeric input until a patch is available.

Generated by OpenCVE AI on September 20, 2026 at 22:09 UTC.

Tracking

Advisories

No advisories available

Metrics

No CVSS v4.0

Attack Vector Local

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploit prediction score: < 1% (0.158% probability within 30 days)

Exploitation none

Automatable no

Technical Impact partial

References

Link	Providers
https://support.apple.com/en-us/149034
https://support.apple.com/en-us/149035
https://support.apple.com/en-us/149041
https://support.apple.com/en-us/149042
https://support.apple.com/en-us/149043

History

Sep 20, 2026 10:30 PM Title updated View changes

Type	Values Removed	Values Added
Title		Integer Overflow Allowing System Crash on Apple iOS, iPadOS, and macOS

Sep 20, 2026 7:30 PM Title updated. Weaknesses updated View changes

Type	Values Removed	Values Added
Title	Integer Overflow in Input Validation Allows Unexpected System Termination on Apple OSes
Weaknesses	CWE-680

Sep 17, 2026 10:30 PM Title updated. Weaknesses updated View changes

Type	Values Removed	Values Added
Title		Integer Overflow in Input Validation Allows Unexpected System Termination on Apple OSes
Weaknesses		CWE-680

Sep 17, 2026 7:00 PM First appearance in the feed. Affected versions updated. Affected vendors updated View changes

Type	Values Removed	Values Added
First Time appeared		Apple ipados Apple iphone Os
CPEs		cpe:2.3:o:apple:ipados:::::::: cpe:2.3:o:apple:iphone_os:::::::: cpe:2.3:o:apple:macos::::::::
Vendors & Products		Apple ipados Apple iphone Os

Sep 17, 2026 4:30 PM Weaknesses updated. Scoring metrics updated View changes

Type	Values Removed	Values Added
Weaknesses		CWE-190
Metrics		cvssV3_1 `{'score': 5.5, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'}` ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

Sep 16, 2026 10:00 AM Title updated. Weaknesses updated View changes

Type	Values Removed	Values Added
Title	Integer Overflow Causing Unexpected System Termination in Apple Operating Systems
Weaknesses	CWE-189

Sep 15, 2026 9:45 AM Title updated. Weaknesses updated View changes

Type	Values Removed	Values Added
Title		Integer Overflow Causing Unexpected System Termination in Apple Operating Systems
Weaknesses		CWE-189

Sep 15, 2026 12:45 AM First appearance in the feed. Affected vendors updated View changes

Type	Values Removed	Values Added
First Time appeared		Apple Apple ios And Ipados Apple macos
Vendors & Products		Apple Apple ios And Ipados Apple macos

Sep 14, 2026 9:00 PM Description updated. Added references View changes

Type	Values Removed	Values Added
Description		An integer overflow was addressed with improved input validation. This issue is fixed in iOS 26.7 and iPadOS 26.7, iOS 27 and iPadOS 27, macOS Golden Gate 27, macOS Sequoia 15.8, macOS Tahoe 26.7. An app may be able to cause unexpected system termination.
References		https://support.apple.com/en-us/149034 https://support.apple.com/en-us/149035 https://support.apple.com/en-us/149041 https://support.apple.com/en-us/149042 https://support.apple.com/en-us/149043