CVE-2020-9844

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.8% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2020-06-09 · updated 2026-06-17
Weakness: CWE-415

Description

A double free issue was addressed with improved memory management. This issue is fixed in iOS 13.5 and iPadOS 13.5, macOS Catalina 10.15.5. A remote attacker may be able to cause unexpected system termination or corrupt kernel memory.

Affected products

Apple iPadOS: before 13.5 — fixed in 13.5
Apple Iphone Os: before 13.5 — fixed in 13.5
macOS: from 10.13 before 10.13.6; from 10.14 before 10.14.6; from 10.15 before 10.15.5; 10.13.6, 10.13.6-security_update_2018-002, 10.13.6-security_update_2018-003, 10.13.6-security_update_2019-001, 10.13.6-security_update_2019-002, 10.13.6-security_update_2019-003 (+15) — fixed in 10.13.6, 10.14.6, 10.15.5

How to fix

Upgrade to a fixed version: Apple iPadOS 13.5; Apple Iphone Os 13.5; macOS 10.13.6, 10.14.6, 10.15.5. Check the vendor advisory for mitigations.

References

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