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TI-2026-76693 Aliases CVE-2026-86944GHSA-fcpj-78rx-jrg9

Apple iOS, iPadOS and macOS out-of-bounds write causes system termination

Priority LOW 24CWE-787Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
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

An out-of-bounds write in Apple iOS and iPadOS before 26.7 and macOS before 15.8 and 26.7 lets a local app with low privileges cause unexpected system termination. The flaw is tracked as CWE-787, and Apple addressed it with improved bounds checking. An app on the device can trigger the crash without user interaction.

Written with Claude Haiku 5.5 from the sources below · 2026-10-31

Description from the CNA

An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in iOS 26.7 and iPadOS 26.7, macOS Sequoia 15.8, macOS Tahoe 26.7. An app may be able to cause unexpected system termination.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00151 4th percentileScored 2026-11-07
Fix Fixed iOS and iPadOS (Apple): 26.7macOS (Apple): 15.8, 26.7

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

VendorProductAffected versionsFixed inStatusSource
AppleiOS and iPadOSbefore 26.726.7Patch availableCNA
ApplemacOSbefore 15.8; before 26.715.8, 26.7Patch availableCNA
  • iOS and iPadOS VendorApple Affected before 26.7 Fixed in 26.7 Patch available CNA
  • macOS VendorApple Affected before 15.8; before 26.7 Fixed in 15.8, 26.7 Patch available CNA

Remediation

Update iOS and iPadOS to 26.7 or later, and update macOS Sequoia to 15.8 or later and macOS Tahoe to 26.7 or later.

Written with Claude Haiku 5.5 from the sources below · 2026-10-31

  • Fix · CNA iOS and iPadOS (Apple) Fixed in 26.7
  • Fix · CNA macOS (Apple) Fixed in 15.8, 26.7

Fixed in the same release

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

  • Release ·

    Apple macOS 15.8, 26.7

    4 records Highest priority Priority LOW 4 LOW

    Other records, highest priority first

    • TI-2026-76653 Apple macOS flaw lets apps gain higher privilegesPriority LOW 35
    • TI-2026-76707 Out-of-bounds write in Apple macOS lets apps crash the systemPriority LOW 24
    • TI-2026-76680 Missing authorization in Apple macOS lets admins modify System KeychainPriority LOW 19
    Show all 4 records →

Timeline

  1. 2026-10-20 Threatist record created from CVE-2026-86944
  2. 2026-10-30 CVSS score added · CISA ADP
  3. 2026-10-30 Weakness changed · CISA ADP
  4. 2026-10-30 CISA SSVC decision points changed
  5. 2026-10-30 Alias added: GHSA-fcpj-78rx-jrg9

References

Other 3

  • 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