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TI-2021-11217 Aliases CVE-2021-30845GHSA-hfx3-2rg5-4pq4

Out-of-bounds read in Apple macOS

Priority LOW 24CWE-125Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
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

An out-of-bounds read was addressed with improved bounds checking. This issue is fixed in macOS Big Sur 11.6. A local user may be able to read kernel memory.

Why it matters now

EPSS 0.00257 17th percentileScored 2026-11-07
Fix Fixed macOS (Apple): 11.6

SSVC decision points

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

Affected products

VendorProductAffected versionsFixed inStatusSource
ApplemacOSbefore 11.611.6Patch availableCNA
  • macOS VendorApple Affected before 11.6 Fixed in 11.6 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*11.0 to before 11.6VulnerableApple
  • cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:* Versions 11.0 to before 11.6 Vulnerable ·Apple

Remediation

  • Fix · CNA macOS (Apple) Fixed in 11.6

Fixed in the same release

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

  • Release ·

    Apple macOS 11.6

    12 records Highest priority Priority LOW 12 LOW

    Other records, highest priority first

    • TI-2021-11219 Apple macOS: Processing a maliciously crafted image may lead to arbitrary code executionPriority LOW 39
    • TI-2021-11215 Apple macOS: Processing a maliciously crafted dfont file may lead to arbitrary code…Priority LOW 37
    • TI-2021-11214 Apple macOS: Processing a maliciously crafted dfont file may lead to arbitrary code…Priority LOW 37
    Show all 12 records →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-30845
  2. 2026-10-03 Alias added: GHSA-hfx3-2rg5-4pq4

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