CVE-2020-3837Known exploitation

Kernel code execution via IOAccelerator memory corruption

Published Feb 27, 2020 · Updated Oct 21, 2025

Memory corruption in Apple IOAcceleratorFamily on iOS, macOS, tvOS, and watchOS allows local users to execute code with kernel privileges. Apple has not disclosed the exact memory operation or application-controlled input that causes corruption in the graphics accelerator kernel component. Affected releases precede iOS and tvOS 13.3.1, macOS Catalina 10.15.3, and watchOS 6.1.2; exploitation requires local application execution and user interaction.

CVSS severity7.8
High
EPSS probability16.11%
Next 30 days · Sep 16, 2026
Known exploitationReported
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Memory corruption in Apple IOAcceleratorFamily on iOS, macOS, tvOS, and watchOS allows local users to execute code with kernel privileges. Apple has not disclosed the exact memory operation or application-controlled input that causes corruption in the graphics accelerator kernel component. Affected releases precede iOS and tvOS 13.3.1, macOS Catalina 10.15.3, and watchOS 6.1.2; exploitation requires local application execution and user interaction.

The record

CVE
CVE-2020-3837
Published
Feb 27, 2020
Updated
Oct 21, 2025
Vendor
Apple
Product
iOS
Classifications
CWE-787, T1068
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 27, 2020CVE publishedPublication date reported by the CVE source.
  2. Oct 21, 2025Record 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 13.3.1 and iPadOS 13.3.1

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Apple · iOSversion=unspecified <iOS 13.3.1 and iPadOS 13.3.1
Apple · tvOSversion=unspecified <tvOS 13.3.1
Apple · macOSversion=unspecified <macOS Catalina 10.15.3
Apple · watchOSversion=unspecified <watchOS 6.1.2

Published CVSS scores

9.3NIST NVDAV:N/AC:M/Au:N/C:C/I:C/A:C
7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
7.8CISA-ADPCVSS: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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationReported
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-787Out-of-bounds Write
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.

Reported exploitation

Technologies

Your stack

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Your stack

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