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TI-2026-16743 Aliases CVE-2026-20687GHSA-c4px-j3mf-78gh

Use after free in Apple iOS and iPadOS

Priority LOW 31CWE-416Published · Updated

Key facts

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

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

Summary

A use after free issue was addressed with improved memory management. This issue is fixed in iOS 18.7.7 and iPadOS 18.7.7, iOS 26.4 and iPadOS 26.4, macOS Sequoia 15.7.5, macOS Tahoe 26.4, tvOS 26.4, watchOS 26.4. An app may be able to cause unexpected system termination or write kernel memory.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00348 28th percentileScored 2026-11-07
Fix Fixed iOS and iPadOS (Apple): 18.7.7, 26.4macOS (Apple): 15.7.5, 26.4+2 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

VendorProductAffected versionsFixed inStatusSource
AppleiOS and iPadOSbefore 18.7.7; before 26.418.7.7, 26.4Patch availableCNA
ApplemacOSbefore 15.7.5; before 26.415.7.5, 26.4Patch availableCNA
AppletvOSbefore 26.426.4Patch availableCNA
ApplewatchOSbefore 26.426.4Patch availableCNA
  • iOS and iPadOS VendorApple Affected before 18.7.7; before 26.4 Fixed in 18.7.7, 26.4 Patch available CNA
  • macOS VendorApple Affected before 15.7.5; before 26.4 Fixed in 15.7.5, 26.4 Patch available CNA
  • tvOS VendorApple Affected before 26.4 Fixed in 26.4 Patch available CNA
  • watchOS VendorApple Affected before 26.4 Fixed in 26.4 Patch available CNA

CPE configurations NVD · 5

CPEVersionsRoleVendor
cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:*before 18.7.7; 26.0 to before 26.4VulnerableApple
cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*before 18.7.7; 26.0 to before 26.4VulnerableApple
cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*15.0 to before 15.7.5; 26.0 to before 26.4VulnerableApple
cpe:2.3:o:apple:tvos:*:*:*:*:*:*:*:*before 26.4VulnerableApple
cpe:2.3:o:apple:watchos:*:*:*:*:*:*:*:*before 26.4VulnerableApple
  • cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:* Versions before 18.7.7; 26.0 to before 26.4 Vulnerable ·Apple
  • cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:* Versions before 18.7.7; 26.0 to before 26.4 Vulnerable ·Apple
  • cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:* Versions 15.0 to before 15.7.5; 26.0 to before 26.4 Vulnerable ·Apple
  • cpe:2.3:o:apple:tvos:*:*:*:*:*:*:*:* Versions before 26.4 Vulnerable ·Apple
  • cpe:2.3:o:apple:watchos:*:*:*:*:*:*:*:* Versions before 26.4 Vulnerable ·Apple

Remediation

  • Fix · CNA iOS and iPadOS (Apple) Fixed in 18.7.7, 26.4
  • Fix · CNA macOS (Apple) Fixed in 15.7.5, 26.4
  • Fix · CNA tvOS (Apple) Fixed in 26.4
  • Fix · CNA watchOS (Apple) Fixed in 26.4

Fixed in the same release

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

  • Release ·

    Apple watchOS 26.4

    20 records Highest priority Priority LOW 20 LOW

    Other records, highest priority first

    • TI-2026-23066 Information disclosure in Apple iOS and iPadOSPriority LOW 37
    • TI-2026-16721 Protection mechanism failure in Apple SafariPriority LOW 36
    • TI-2026-23054 Improper authorization in Apple iOS and iPadOSPriority LOW 34
    Show all 20 records →
  • Release ·

    Apple iOS and iPadOS 18.7.7, 26.4

    16 records Highest priority Priority LOW 16 LOW

    Other records, highest priority first

    • TI-2026-23066 Information disclosure in Apple iOS and iPadOSPriority LOW 37
    • TI-2026-23068 Improper access control in Apple iOS and iPadOSPriority LOW 36
    • TI-2026-16721 Protection mechanism failure in Apple SafariPriority LOW 36
    Show all 16 records →
Show 2 more groups
  • Release ·

    Apple tvOS 26.4

    15 records Highest priority Priority LOW 15 LOW

    Other records, highest priority first

    • TI-2026-23066 Information disclosure in Apple iOS and iPadOSPriority LOW 37
    • TI-2026-16721 Protection mechanism failure in Apple SafariPriority LOW 36
    • TI-2026-23054 Improper authorization in Apple iOS and iPadOSPriority LOW 34
    Show all 15 records →
  • Release ·

    Apple macOS 15.7.5, 26.4

    3 records Highest priority Priority LOW 3 LOW

    Other records, highest priority first

    • TI-2026-23056 Apple iOS and iPadOS: An app may be able to leak sensitive kernel statePriority LOW 27
    • TI-2026-23043 Improper input validation in Apple iOS and iPadOSPriority LOW 24
    Show all 3 records →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-20687
  2. 2026-10-03 Alias added: GHSA-c4px-j3mf-78gh

References

Advisory 6

  • 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
  • TI-2022-06854 Out-of-bounds write in Apple iOS and iPadOS KEVCVSS 3.1CRITICAL 9.8
See all 2382 →

Sources

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