Is CVE-2020-27950 in the CISA KEV catalog?

Yes. CVE-2020-27950 is on the CISA Known Exploited Vulnerabilities list, added 2021-11-03.

What is the CVSS severity of CVE-2020-27950?

CVE-2020-27950 has a CVSS v3 base score of 5.5 (MEDIUM).

What is the EPSS score for CVE-2020-27950?

CVE-2020-27950 has an EPSS score of 16.52% (97th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2020-27950?

Upgrade ipados to 14.2 or later. Fixes are available for 4 affected products.

CVE & CISA-KEV Catalog

CVE-2020-27950

MEDIUMCISA KEVEPSS 97th pctl

5.5

CVSS v3

NVD

Description

A memory initialization issue was addressed. This issue is fixed in macOS Big Sur 11.0.1, watchOS 7.1, iOS 12.4.9, watchOS 6.2.9, Security Update 2020-006 High Sierra, Security Update 2020-006 Mojave, iOS 14.2 and iPadOS 14.2, watchOS 5.3.9, macOS Catalina 10.15.7 Supplemental Update, macOS Catalina 10.15.7 Update. A malicious application may be able to disclose kernel memory.

CWE-665

How to fix

Remediation Available

ipadosNVD

Affected:< 14.2Fixed in:14.2CVE-2020-27950derived from NVD

iphone osNVD

Affected:>= 14.0, < 14.2Fixed in:14.2CVE-2020-27950derived from NVD

macosNVD

Affected:>= 11.0, < 11.0.1Fixed in:11.0.1CVE-2020-27950derived from NVD

watchosNVD

Affected:>= 7.0, < 7.1Fixed in:7.1CVE-2020-27950derived from NVD

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorLocal

Attack ComplexityLow

Privileges RequiredNone

User InteractionRequired

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityNone

AvailabilityNone

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

Exploit Intelligence

16.52%probability of exploitation in 30 days

97thpercentile

Very high risk: more likely to be exploited than 97% of all known CVEs.

Known Exploited Vulnerability (CISA KEV)

Apple Multiple Products Memory Initialization Vulnerability

Apple iOS, iPadOS, macOS, and watchOS contain a memory initialization vulnerability that may allow a malicious application to disclose kernel memory.

Apply updates per vendor instructions.

Remediation due: 2022-05-03

References

Vendor Advisory8

Third-Party Advisory2

Government Resource1

cisa.gov

Related Vulnerabilities

Other CWE-665 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2022-0847	High	7.8	89%	KEV	Fix
CVE-2022-22719	High	7.5	70%	-	Fix
CVE-2020-28019	High	7.5	62%	-	Fix
CVE-2022-46164	Critical	9.4	49%	-	Fix
CVE-2022-37128	Critical	9.8	21%	-	-
CVE-2019-14271	Critical	9.8	19%	-	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2025-10-27.