CVE-2020-9967

Severity: high (CVSS 7.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2021-04-02 · updated 2026-06-17
Weakness: CWE-787

Description

Multiple memory corruption issues were 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. A remote attacker may be able to cause unexpected system termination or corrupt kernel memory.

Affected products

Apple iPadOS: before 14.0 — fixed in 14.0
Apple Iphone Os: before 14.0 — fixed in 14.0
macOS: from 10.14 before 10.14.6; from 10.15 before 10.15.7; 10.14.6, 10.14.6-security_update_2019-001, 10.14.6-security_update_2019-002, 10.14.6-security_update_2020-001, 10.14.6-security_update_2020-002, 10.14.6-security_update_2020-003 (+7) — fixed in 10.14.6, 10.15.7
Apple macOS: from 11.0 before 11.1.0 — fixed in 11.1.0
Apple tvOS: before 14.0 — fixed in 14.0
Apple watchOS: before 7.0 — fixed in 7.0

How to fix

Upgrade to a fixed version: Apple iPadOS 14.0; Apple Iphone Os 14.0; macOS 10.14.6, 10.15.7; Apple macOS 11.1.0; Apple tvOS 14.0; Apple watchOS 7.0. Check the vendor advisory for mitigations.

References

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