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TI-2021-11133 Aliases CVE-2021-30755GHSA-gwjf-hjm7-xvq3

Out-of-bounds read in Apple macOS

Priority LOW 32CWE-125Published · Updated

Key facts

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

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-125 and the CVSS impact.

Summary

Processing a maliciously crafted font may result in the disclosure of process memory. This issue is fixed in macOS Big Sur 11.4, tvOS 14.6, watchOS 7.5. An out-of-bounds read was addressed with improved input validation.

Why it matters now

EPSS 0.01331 71st percentileScored 2026-11-07
Fix Fixed macOS (Apple): 11.4, 14.6, 7.5

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
ApplemacOSbefore 11.411.4Patch availableCNA
ApplemacOSbefore 14.614.6Patch availableCNA
ApplemacOSbefore 7.57.5Patch availableCNA
  • macOS VendorApple Affected before 11.4 Fixed in 11.4 Patch available CNA
  • macOS VendorApple Affected before 14.6 Fixed in 14.6 Patch available CNA
  • macOS VendorApple Affected before 7.5 Fixed in 7.5 Patch available CNA

CPE configurations NVD · 3

CPEVersionsRoleVendor
cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*11.0 to before 11.4VulnerableApple
cpe:2.3:o:apple:tvos:*:*:*:*:*:*:*:*before 14.6VulnerableApple
cpe:2.3:o:apple:watchos:*:*:*:*:*:*:*:*before 7.5VulnerableApple
  • cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:* Versions 11.0 to before 11.4 Vulnerable ·Apple
  • cpe:2.3:o:apple:tvos:*:*:*:*:*:*:*:* Versions before 14.6 Vulnerable ·Apple
  • cpe:2.3:o:apple:watchos:*:*:*:*:*:*:*:* Versions before 7.5 Vulnerable ·Apple

Remediation

  • Fix · CNA macOS (Apple) Fixed in 11.4
  • Fix · CNA macOS (Apple) Fixed in 14.6
  • Fix · CNA macOS (Apple) Fixed in 7.5

Fixed in the same release

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

  • Release ·

    Apple macOS 11.4

    70 records Highest priority Priority CRITICAL 1 CRITICAL, 7 MEDIUM, 62 LOW

    Other records, highest priority first

    • TI-2021-11096 Missing authorization in Apple macOSPriority CRITICAL 93
    • TI-2021-11104 Apple macOS: An attacker in a privileged network position may be able to leak sensitive…Priority MEDIUM 50
    • TI-2021-11062 Apple macOS: A remote attacker may be able to cause unexpected application termination or…Priority MEDIUM 48
    Show all 70 records →
  • Release ·

    Apple macOS 14.6

    30 records Highest priority Priority CRITICAL 2 CRITICAL, 4 MEDIUM, 24 LOW

    Other records, highest priority first

    • TI-2021-11050 Out-of-bounds write in Apple macOSPriority CRITICAL 97
    • TI-2021-11048 Integer overflow in Apple macOSPriority CRITICAL 97
    • TI-2021-11115 Out-of-bounds write in Apple iOS and iPadOSPriority MEDIUM 42
    Show all 30 records →
Show 1 more group
  • Release ·

    Apple macOS 7.5

    29 records Highest priority Priority MEDIUM 4 MEDIUM, 25 LOW

    Other records, highest priority first

    • TI-2021-11115 Out-of-bounds write in Apple iOS and iPadOSPriority MEDIUM 42
    • TI-2021-11091 Buffer overflow in Apple iOS and iPadOSPriority MEDIUM 42
    • TI-2021-11128 Out-of-bounds write in Apple iOS and iPadOSPriority MEDIUM 41
    Show all 29 records →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-30755
  2. 2026-10-03 Alias added: GHSA-gwjf-hjm7-xvq3

References

Advisory 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 3490 →

Sources

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