Actively exploited · Published Jun 5, 2020 · Assigned by apple

CVE-2020-9859

High 7.8 Exploited

In plain English

A high-severity double free in iOS from Apple. Attackers are actively exploiting it in the wild (listed by CISA on November 3, 2021). The chance it is exploited in the next 30 days is estimated at 0.8% (higher than 58% of all known vulnerabilities). Apply updates per vendor instructions.

Severity (CVSS 3.1)7.8High

Exploit odds (30 days)0.8%top 42.3% of all CVEs

Exploited in the wildYesCISA KEV since Nov 3, 2021

Attack toolingNoneno public tooling known

CISA guidance

Apply updates per vendor instructions.

Federal agencies must remediate by May 3, 2022.

Official description

A memory consumption issue was addressed with improved memory handling. This issue is fixed in iOS 13.5.1 and iPadOS 13.5.1, macOS Catalina 10.15.5 Supplemental Update, tvOS 13.4.6, watchOS 6.2.6. An application may be able to execute arbitrary code with kernel privileges.

Affected products (as reported)

Vendor	Product	Versions
Apple	iOS	unspecified – before iOS 13.5.1 and iPadOS 13.5.1
Apple	macOS	unspecified – before macOS Catalina 10.15.5 Supplemental Update
Apple	tvOS	unspecified – before tvOS 13.4.6
Apple	watchOS	unspecified – before watchOS 6.2.6

Weakness: CWE-415 · Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

References

https://support.apple.com/HT211214 x_refsource_MISC
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-9859 government-resource