CVE-2021-30869

Apple iOS, iPadOS, and macOS: Type Confusion

As of , CVE-2021-30869 in Apple iOS, iPadOS, and macOS is on CISA's list of exploited vulnerabilities: CISA listed it on . Our patch-first group: Patch soon.

Exploited
Yes: CISA listed it on 3 November 2021
US federal deadline
17 November 202114 days after CISA listed it. US federal civilian agencies must fix it by then.
Used in ransomware campaigns
Not known to CISA
EPSS score
0.04Higher than 90% of the CVEs EPSS scores. EPSS estimates the chance of exploitation activity in the next 30 days.
EPSS when listed
Not availableCISA listed it before 4 February 2022, where the EPSS files we read begin.
Public exploit
None foundNeither Metasploit nor Exploit-DB lists one.
Fix
No vendor link in CISA's entry

What CISA says to do

Apply updates per vendor instructions.

CISA's required action

What the flaw is

Apple iOS, iPadOS, and macOS contain a type confusion vulnerability in the XNU which may allow a malicious application to execute code with kernel privileges.

CISA's description

A type confusion issue was addressed with improved state handling. This issue is fixed in iOS 12.5.5, iOS 14.4 and iPadOS 14.4, macOS Big Sur 11.2, Security Update 2021-001 Catalina, Security Update 2021-001 Mojave, Security Update 2021-006 Catalina. A malicious application may be able to execute arbitrary code with kernel privileges. Apple is aware of reports that an exploit for this issue exists in the wild.

The CVE record's description, from apple

CVE published
24 August 2021
Assigned by
apple
CVSS
7.8 High (CVSS 3.1, from CISA-ADP)
CWE-843
Access of Resource Using Incompatible Type ('Type Confusion')
CISA SSVC, exploitation
active
CISA SSVC, automatable
no
CISA SSVC, technical impact
total

Timeline

  1. The CVE record was published.
  2. CISA added it to its list of exploited vulnerabilities.
  3. The US federal deadline to fix it.

iOS, iPadOS, and macOS: other exploited entries

VulnerabilityProductOur groupListedDeadlineEPSS
CVE-2020-9934Input ValidationApple iOS, iPadOS, and macOSPatch this weekMetasploit module0.03
CVE-2023-41064ImageIO Buffer OverflowApple iOS, iPadOS, and macOSPatch this weekEPSS 0.530.53
CVE-2025-43300Out-of-Bounds WriteApple iOS, iPadOS, and macOSPatch soon0.32
CVE-2023-28206IOSurfaceAccelerator Out-of-Bounds WriteApple iOS, iPadOS, and macOSPatch soon0.23
CVE-2022-22620Webkit Use-After-FreeApple iOS, iPadOS, and macOSPatch soon0.16
CVE-2021-30858iOS, iPadOS, macOS Use-After-FreeApple iOS, iPadOS, and macOSPatch soon0.13
CVE-2021-1870WebKit Remote Code ExecutionApple iOS, iPadOS, and macOSPatch soon0.08
CVE-2021-1871WebKit Remote Code ExecutionApple iOS, iPadOS, and macOSPatch soon0.07
CVE-2021-30900Out-of-Bounds WriteApple iOS, iPadOS, and macOSPatch soon0.05
CVE-2022-32917Remote Code ExecutionApple iOS, iPadOS, and macOSPatch soon0.06

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