CVE-2020-9956 - CVE House
Back to Database
Status published High CVE-2020-9956

An out-of-bounds read was addressed with improved input validation. This...

Vulnerability Description

An out-of-bounds read was addressed with improved input validation. This issue is fixed in macOS Big Sur 11.0.1, tvOS 14.0, macOS Big Sur 11.1, Security Update 2020-001 Catalina, Security Update 2020-007 Mojave, watchOS 7.0, iOS 14.0 and iPadOS 14.0. Processing a maliciously crafted font file may lead to arbitrary code execution.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

THREAT MONITOR

Am I Vulnerable?

Launch our assessment wizard to check if your infrastructure is exposed to • CVE-2020-9956

Credits & Attribution

No credits recorded in the NVD database.

References

More from Apple

View All →
CVE-2025-46316
An out-of-bounds read was addressed with improved input validation. This...
Unknown 0
CVE-2025-46315
A permissions issue was addressed with additional restrictions. This issue...
Unknown 0
CVE-2025-46313
A logging issue was addressed with improved data redaction. This...
Unknown 0
CVE-2025-46311
An inconsistent user interface issue was addressed with improved state...
Unknown 0
CVE-2025-46310
This issue was addressed through improved state management. This issue...
Unknown 0

Affected Vendor

Affected Software

tvOS, watchOS, iOS and iPadOS, macOS
Vulnerable Versions:
unspecified

Timeline

Official Publish: April 2nd, 2021
Last Modified: August 4th, 2024
Added to House: July 21st, 2026

CVSS Vectors

V3: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Weaknesses (CWE)

No CWE data available

MITRE ATT&CK TTPs

No associated TTPs found for this vulnerability.