CVE-2020-9852

Kernel code execution via integer overflow

Published Jun 9, 2020 · Updated Aug 4, 2024

Kernel integer overflow in Apple iOS before 13.5 allows local users to execute arbitrary code with kernel privileges through a malicious app. The public advisories identify only an integer overflow in Kernel and do not disclose the affected operation or input. macOS Catalina before 10.15.5, tvOS before 13.4.5, and watchOS before 6.2.5 contain the same flaw, and execution of a malicious local application is required.

CVSS severity7.8
High
EPSS probability1.31%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Kernel integer overflow in Apple iOS before 13.5 allows local users to execute arbitrary code with kernel privileges through a malicious app. The public advisories identify only an integer overflow in Kernel and do not disclose the affected operation or input. macOS Catalina before 10.15.5, tvOS before 13.4.5, and watchOS before 6.2.5 contain the same flaw, and execution of a malicious local application is required.

The record

CVE
CVE-2020-9852
Published
Jun 9, 2020
Updated
Aug 4, 2024
Vendor
Apple
Product
iOS
Classifications
CWE-190, T1068
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 9, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=unspecified <iOS 13.5 and iPadOS 13.5

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Apple · iOSversion=unspecified <iOS 13.5 and iPadOS 13.5
Apple · tvOSversion=unspecified <tvOS 13.4.5
Apple · macOSversion=unspecified <macOS Catalina 10.15.5
Apple · watchOSversion=unspecified <watchOS 6.2.5

Published CVSS scores

9.3NIST National Vulnerability DatabaseAV:N/AC:M/Au:N/C:C/I:C/A:C
7.8NIST National Vulnerability DatabaseCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-190Integer Overflow or Wraparound
T1068Exploitation for Privilege Escalation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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