TI-2021-11374 Aliases CVE-2021-31013

Out-of-bounds read in Apple macOS

LOW 26CWE-125Published 2021-08-24 · Updated 2024-08-03

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 Monterey 12.1, iOS 15.2 and iPadOS 15.2, macOS Big Sur 11.6.2. Processing a maliciously crafted font may result in the disclosure of process memory.

Why it matters now

EPSS 0.00797 56th percentileScored 2026-11-07

Fix Fixed macOS (Apple): 12.1, 11.6, 15.2

SSVC decision points

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

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Apple	macOS	before 12.1	12.1	Patch available	CNA
Apple	macOS	before 11.6	11.6	Patch available	CNA
Apple	macOS	before 15.2	15.2	Patch available	CNA

macOS VendorApple Affected before 12.1 Fixed in 12.1 Patch available CNA
macOS VendorApple Affected before 11.6 Fixed in 11.6 Patch available CNA
macOS VendorApple Affected before 15.2 Fixed in 15.2 Patch available CNA

CPE configurations NVD · 3

CPE	Versions	Role	Vendor
cpe:2.3:o:apple:ipados::::::::	before 15.2	Vulnerable	Apple
cpe:2.3:o:apple:iphone_os::::::::	before 15.2	Vulnerable	Apple
cpe:2.3:o:apple:macos::::::::	11.0 to before 11.6.2; 12.0.0 to before 12.1	Vulnerable	Apple

cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:* Versions before 15.2 Vulnerable ·Apple
cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:* Versions before 15.2 Vulnerable ·Apple
cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:* Versions 11.0 to before 11.6.2; 12.0.0 to before 12.1 Vulnerable ·Apple

Remediation

Fix · CNA macOS (Apple) Fixed in 12.1
Fix · CNA macOS (Apple) Fixed in 11.6
Fix · CNA macOS (Apple) Fixed in 15.2

Fixed in the same release

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

Release · 2021-08-24
Apple macOS 11.6
72 records Highest priority Priority CRITICAL 4 CRITICAL, 5 MEDIUM, 63 LOW
Other records, highest priority first
- TI-2021-11230 Use after free in Apple macOSPriority CRITICAL 97
- TI-2021-11253 Out-of-bounds write in Apple iOS and iPadOSPriority CRITICAL 93
- TI-2021-11232 Integer overflow in Apple macOSPriority CRITICAL 93
Show all 72 records →
Release · 2021-08-24
Apple macOS 12.1
40 records Highest priority Priority MEDIUM 6 MEDIUM, 34 LOW
Other records, highest priority first
- TI-2021-11304 Out-of-bounds write in Apple watchOSPriority MEDIUM 51
- TI-2021-11372 Apple iOS and iPadOS: Multiple issues in HDF5Priority MEDIUM 44
- TI-2021-11341 Incorrect authorization in Apple macOSPriority MEDIUM 41
Show all 40 records →

Show 1 more group

Release · 2021-08-24
Apple macOS 15.2
18 records Highest priority Priority MEDIUM 3 MEDIUM, 15 LOW
Other records, highest priority first
- TI-2021-11304 Out-of-bounds write in Apple watchOSPriority MEDIUM 51
- TI-2021-11306 Out-of-bounds read in Apple watchOSPriority MEDIUM 41
- TI-2021-11357 Buffer overflow in Apple watchOSPriority MEDIUM 40
Show all 18 records →

Timeline

2026-10-02 Threatist record created from CVE-2021-31013

References

Other 3

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