TI-2026-76696 Aliases CVE-2026-86953 GHSA-3hf6-q2c8-cwvf

Out-of-bounds write in Apple OS allows denial of service from nearby

LOW 21CWE-787Published 2026-10-20 · Updated 2026-10-26

Key facts

Attack vector: Physical
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: Denial of service
Confidentiality · integrity · availability: None · None · High
Fix status: Fixed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-787 and the CVSS impact.

Summary

Apple iOS and iPadOS, macOS, tvOS, visionOS and watchOS before 27 contain an out-of-bounds write (CWE-787) flaw. The write is addressed with improved bounds checking. An attacker in physical proximity may be able to cause a denial of service.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Description from the CNA

An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in iOS 27 and iPadOS 27, macOS Golden Gate 27, tvOS 27, visionOS 27, watchOS 27. An attacker in physical proximity may be able to cause a denial-of-service.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00232 14th percentileScored 2026-11-07

Fix Fixed iOS and iPadOS (Apple): 27macOS (Apple): 27+3 more products

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Apple	iOS and iPadOS	before 27	27	Patch available	CNA
Apple	macOS	before 27	27	Patch available	CNA
Apple	tvOS	before 27	27	Patch available	CNA
Apple	visionOS	before 27	27	Patch available	CNA
Apple	watchOS	before 27	27	Patch available	CNA

iOS and iPadOS VendorApple Affected before 27 Fixed in 27 Patch available CNA
macOS VendorApple Affected before 27 Fixed in 27 Patch available CNA
tvOS VendorApple Affected before 27 Fixed in 27 Patch available CNA
visionOS VendorApple Affected before 27 Fixed in 27 Patch available CNA
watchOS VendorApple Affected before 27 Fixed in 27 Patch available CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPE	Versions	Role	Vendor
cpe:2.3:o:apple:visionos::::::::	—	—	Apple

cpe:2.3:o:apple:visionos:*:*:*:*:*:*:*:* Versions — — ·Apple

Remediation

Apple fixes this in iOS 27, iPadOS 27, macOS Golden Gate 27, tvOS 27, visionOS 27 and watchOS 27.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Fix · CNA iOS and iPadOS (Apple) Fixed in 27
Fix · CNA macOS (Apple) Fixed in 27
Fix · CNA tvOS (Apple) Fixed in 27
Fix · CNA visionOS (Apple) Fixed in 27
Fix · CNA watchOS (Apple) Fixed in 27

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

Release · 2026-10-20
Apple macOS 27
16 records Highest priority Priority MEDIUM 1 MEDIUM, 15 LOW
Other records, highest priority first
- TI-2026-76687 Type confusion in Apple Safari and iOS allows code executionPriority MEDIUM 40
- TI-2026-76654 Apple macOS may launch maliciously modified appsPriority LOW 38
- TI-2026-76700 Race condition in Apple iOS, iPadOS and macOS lets apps escape sandboxPriority LOW 35
Show all 16 records →
Release · 2026-10-20
Apple visionOS 27
14 records Highest priority Priority MEDIUM 2 MEDIUM, 12 LOW
Other records, highest priority first
- TI-2026-76687 Type confusion in Apple Safari and iOS allows code executionPriority MEDIUM 40
- TI-2026-76685 Stack overflow in Apple iOS, macOS and visionOS allows code executionPriority MEDIUM 40
- TI-2026-76698 Out-of-bounds read in Apple operating systems can crash the systemPriority LOW 29
Show all 14 records →

Show 3 more groups

Release · 2026-10-20
Apple iOS and iPadOS 27
11 records Highest priority Priority MEDIUM 1 MEDIUM, 10 LOW
Other records, highest priority first
- TI-2026-76687 Type confusion in Apple Safari and iOS allows code executionPriority MEDIUM 40
- TI-2026-76705 Incorrect authorization in Apple iOS and iPadOS may let apps place callsPriority LOW 38
- TI-2026-76700 Race condition in Apple iOS, iPadOS and macOS lets apps escape sandboxPriority LOW 35
Show all 11 records →
Release · 2026-10-20
Apple watchOS 27
9 records Highest priority Priority LOW 9 LOW
Other records, highest priority first
- TI-2026-76698 Out-of-bounds read in Apple operating systems can crash the systemPriority LOW 29
- TI-2026-76674 Out-of-bounds write in Apple operating systems can crash devicesPriority LOW 29
- TI-2026-76701 Double free in Apple iOS, iPadOS and macOS causes system terminationPriority LOW 24
Show all 9 records →
Release · 2026-10-20
Apple tvOS 27
8 records Highest priority Priority LOW 8 LOW
Other records, highest priority first
- TI-2026-76698 Out-of-bounds read in Apple operating systems can crash the systemPriority LOW 29
- TI-2026-76674 Out-of-bounds write in Apple operating systems can crash devicesPriority LOW 29
- TI-2026-76701 Double free in Apple iOS, iPadOS and macOS causes system terminationPriority LOW 24
Show all 8 records →

Timeline

2026-10-20 Threatist record created from CVE-2026-86953
2026-10-20 CVSS score added · CISA ADP
2026-10-20 Weakness changed · CISA ADP
2026-10-20 CISA SSVC decision points changed
2026-10-20 Alias added: GHSA-3hf6-q2c8-cwvf

References

Other 5

TI-2026-46583 Improper authentication in Apple macOS KEVCVSS 3.1CRITICAL 9.8
TI-2025-28008 Out-of-bounds write in Apple iOS and iPadOS KEVCVSS 3.1CRITICAL 10.0
TI-2025-22441 Apple iOS and iPadOS: An attacker with arbitrary read and write capability may be able to… KEVCVSS 3.1CRITICAL 9.8
TI-2025-22440 Memory corruption in Apple iOS and iPadOS KEVCVSS 3.1CRITICAL 9.8
TI-2025-17951 Out-of-bounds write in Apple Safari KEVCVSS 3.1CRITICAL 10.0
TI-2025-17847 Use after free in Apple iOS and iPadOS KEVCVSS 3.1CRITICAL 10.0

See all 9536 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences