CVE-2020-9956

HighCVSS 7.8/10Last modified Jun 17, 2026

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.

Metrics

CVSS 3.1 7.8/10CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-125

Affected software

VendorProductVersions
AppletvOS>= unspecified, < 14.0
ApplewatchOS>= unspecified, < 7.0
AppleiOS and iPadOS>= unspecified, < 14.0
ApplemacOS>= unspecified, < 11.0
ApplemacOS>= unspecified, < 11.1

References

Timeline

Published
Apr 2, 2021
Last modified
Jun 17, 2026
NVD status
Modified

Related CVEs from 2020

CVE-2020-99587.8An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in iOS 14.0 and iPadOS 14.0. An application maCVE-2020-99592.4A lock screen issue allowed access to messages on a locked device. This issue was addressed with improved state management. This issue is fiCVE-2020-99607.8An 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 11CVE-2020-99617.8An out-of-bounds read was addressed with improved input validation. This issue is fixed in macOS Catalina 10.15.7, Security Update 2020-005 CVE-2020-99627.8A buffer overflow was addressed with improved size validation. This issue is fixed in macOS Big Sur 11.0.1, tvOS 14.0, macOS Big Sur 11.1, SCVE-2020-99635.5The issue was addressed with improved handling of icon caches. This issue is fixed in macOS Big Sur 11.0.1, iOS 14.0 and iPadOS 14.0. A maliCVE-2020-99645.5A memory initialization issue was addressed with improved memory handling. This issue is fixed in iOS 14.0 and iPadOS 14.0. A local user mayCVE-2020-99657.8An out-of-bounds read was addressed with improved input validation. This issue is fixed in macOS Big Sur 11.0.1, watchOS 7.0, tvOS 14.0, iOSCVE-2020-99667.8An out-of-bounds read was addressed with improved input validation. This issue is fixed in macOS Big Sur 11.0.1, watchOS 7.0, tvOS 14.0, iOSCVE-2020-99677.8Multiple memory corruption issues were addressed with improved input validation. This issue is fixed in macOS Big Sur 11.0.1, tvOS 14.0, macCVE-2020-99685.5A logic issue was addressed with improved restrictions. This issue is fixed in iOS 14.0 and iPadOS 14.0, macOS Catalina 10.15.7, tvOS 14.0, CVE-2020-99695.5An access issue was addressed with additional sandbox restrictions. This issue is fixed in macOS Big Sur 11.0.1, watchOS 7.0, tvOS 14.0, iOS
CVE-2020-9956: High severity, CVSS 7.8 | Vulnix