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Out-of-bounds write in Apple iOS, macOS, visionOS and watchOS

Priority MEDIUM 40CWE-787Published · Updated

Key facts

Attack vector
Network
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, visionOS and watchOS before 27.2 contain an out-of-bounds write (CWE-787) that is fixed with improved bounds checking. Processing a maliciously crafted calendar invitation can corrupt memory. A remote unauthenticated attacker needs no user interaction to trigger it.

Written with Claude Haiku 5.5 from the sources below · 2026-11-03

Description from the CNA

An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in iOS 27.2 and iPadOS 27.2, macOS Golden Gate 27.2, visionOS 27.2, watchOS 27.2. Processing a maliciously crafted calendar invitation may lead to memory corruption.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00646 51st percentileScored 2026-11-07
Fix Fixed iOS and iPadOS (Apple): 27.2macOS (Apple): 27.2+2 more products

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
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 27.227.2Patch availableCNA
ApplemacOSbefore 27.227.2Patch availableCNA
ApplevisionOSbefore 27.227.2Patch availableCNA
ApplewatchOSbefore 27.227.2Patch availableCNA
  • iOS and iPadOS VendorApple Affected before 27.2 Fixed in 27.2 Patch available CNA
  • macOS VendorApple Affected before 27.2 Fixed in 27.2 Patch available CNA
  • visionOS VendorApple Affected before 27.2 Fixed in 27.2 Patch available CNA
  • watchOS VendorApple Affected before 27.2 Fixed in 27.2 Patch available CNA

CPE configurations NVD · 5

CPEVersionsRoleVendor
cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:*before 27.2VulnerableApple
cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*before 27.2VulnerableApple
cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*27.0 to before 27.2VulnerableApple
cpe:2.3:o:apple:visionos:*:*:*:*:*:*:*:*before 27.2VulnerableApple
cpe:2.3:o:apple:watchos:*:*:*:*:*:*:*:*before 27.2VulnerableApple
  • cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:* Versions before 27.2 Vulnerable ·Apple
  • cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:* Versions before 27.2 Vulnerable ·Apple
  • cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:* Versions 27.0 to before 27.2 Vulnerable ·Apple
  • cpe:2.3:o:apple:visionos:*:*:*:*:*:*:*:* Versions before 27.2 Vulnerable ·Apple
  • cpe:2.3:o:apple:watchos:*:*:*:*:*:*:*:* Versions before 27.2 Vulnerable ·Apple

Remediation

Update iOS and iPadOS to 27.2, macOS Golden Gate to 27.2, visionOS to 27.2 and watchOS to 27.2. The sources do not list a vendor advisory identifier for this fix.

Written with Claude Haiku 5.5 from the sources below · 2026-11-03

  • Fix · CNA iOS and iPadOS (Apple) Fixed in 27.2
  • Fix · CNA macOS (Apple) Fixed in 27.2
  • Fix · CNA visionOS (Apple) Fixed in 27.2
  • Fix · CNA watchOS (Apple) Fixed in 27.2

Fixed in the same release

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

  • Release ·

    Apple visionOS 27.2

    124 records Highest priority Priority MEDIUM 34 MEDIUM, 90 LOW

    Other records, highest priority first

    • TI-2026-80879 Apple iOS, macOS and visionOS flaw allows WebContent sandbox escapePriority MEDIUM 51
    • TI-2026-80671 Sandbox escape in Apple Safari and other Apple platformsPriority MEDIUM 50
    • TI-2026-80785 Use-after-free in Apple iOS, iPadOS, macOS and other systemsPriority MEDIUM 48
  • Release ·

    Apple macOS 27.2

    78 records Highest priority Priority MEDIUM 23 MEDIUM, 55 LOW

    Other records, highest priority first

    • TI-2026-80671 Sandbox escape in Apple Safari and other Apple platformsPriority MEDIUM 50
    • TI-2026-80835 Out-of-bounds read in Apple iOS, iPadOS and macOS may leak memoryPriority MEDIUM 42
    • TI-2026-80618 Memory corruption in Apple platforms via crafted video filePriority MEDIUM 42
Show 2 more groups
  • Release ·

    Apple watchOS 27.2

    61 records Highest priority Priority MEDIUM 15 MEDIUM, 46 LOW

    Other records, highest priority first

    • TI-2026-80785 Use-after-free in Apple iOS, iPadOS, macOS and other systemsPriority MEDIUM 48
    • TI-2026-80618 Memory corruption in Apple platforms via crafted video filePriority MEDIUM 42
    • TI-2026-80853 Use-after-free in Apple Safari and iOS enables code executionPriority MEDIUM 41
  • Release ·

    Apple iOS and iPadOS 27.2

    40 records Highest priority Priority MEDIUM 10 MEDIUM, 30 LOW

    Other records, highest priority first

    • TI-2026-80671 Sandbox escape in Apple Safari and other Apple platformsPriority MEDIUM 50
    • TI-2026-80835 Out-of-bounds read in Apple iOS, iPadOS and macOS may leak memoryPriority MEDIUM 42
    • TI-2026-80618 Memory corruption in Apple platforms via crafted video filePriority MEDIUM 42

Timeline

  1. 2026-10-26 Threatist record created from CVE-2026-112619
  2. 2026-10-27 Alias added: GHSA-3m7r-r6v2-mj64
  3. 2026-11-03 CVSS score added · CISA ADP
  4. 2026-11-03 Weakness changed · CISA ADP
  5. 2026-11-03 CISA SSVC decision points changed
  6. 2026-11-04 EPSS moved to the 50th–90th percentile
  7. 2026-11-05 Priority changed: LOW → MEDIUM

References

  • 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