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TI-2026-76683 Aliases CVE-2026-86915GHSA-66jj-58cw-683m

Race condition in Apple macOS can cause unexpected system termination

Priority LOW 20CWE-362Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
High
Impact type
—
Confidentiality · integrity · availability
None · None · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA.

Summary

Apple macOS before 27 contains a race condition (CWE-362) in which shared resources are not properly synchronized. A local user with low privileges can run an app that causes unexpected system termination, disrupting availability. The fix uses improved locking.

Written with Claude Haiku 5.5 from the sources below · 2026-11-04

Description from the CNA

A race condition was addressed with improved locking. This issue is fixed in macOS Golden Gate 27. An app may be able to cause unexpected system termination.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00095 0th percentileScored 2026-11-07
Fix Fixed macOS (Apple): 27

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
ApplemacOSbefore 2727Patch availableCNA
  • macOS VendorApple Affected before 27 Fixed in 27 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*before 27.0VulnerableApple
  • cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:* Versions before 27.0 Vulnerable ·Apple

Remediation

Update macOS to version 27, which fixes this issue.

Written with Claude Haiku 5.5 from the sources below · 2026-11-04

  • Fix · CNA macOS (Apple) Fixed in 27

Fixed in the same release

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

  • Release ·

    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 →

Timeline

  1. 2026-10-20 Threatist record created from CVE-2026-86915
  2. 2026-10-20 CVSS score added · CISA ADP
  3. 2026-10-20 Weakness changed · CISA ADP
  4. 2026-10-20 CISA SSVC decision points changed
  5. 2026-10-20 Alias added: GHSA-66jj-58cw-683m

References

Advisory 1

  • 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 3490 →

Sources

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