CVE-2021-30869
Published: November 3, 2021
Official Description
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 KEV Advisory
Apple iOS, iPadOS, and macOS Type Confusion Vulnerability
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.
Apply updates per vendor instructions.
Risk Analysis
This type confusion vulnerability in Apple iOS, iPadOS, and macOS XNU may allow a malicious application to execute code with kernel privileges. Despite the absence of a CVSS score, its HIGH severity and confirmed exploitation in the wild by CISA make it a critical vulnerability. The EPSS score of 0.01997, while low, is superseded by the confirmed active exploitation.
This vulnerability is actively being exploited in the wild, as confirmed by its inclusion in CISA's KEV catalog. It requires a malicious application to be executed on the device to achieve kernel privileges.
Users should apply the latest security updates for Apple iOS, iPadOS, and macOS to mitigate this vulnerability. Only install applications from trusted sources to reduce the risk of malicious application execution.
Technical Analysis
CVE-2021-30869 requires local access, meaning attackers must already have a foothold on the target system.
Exploitation requires some privileges, which limits the exposure to scenarios where an attacker has already gained initial access.
CISA has added CVE-2021-30869 to the Known Exploited Vulnerabilities (KEV) catalog, confirming active exploitation in the wild. U.S. federal agencies are required to patch this within the mandated timeframe, and all organizations should treat remediation as urgent.
Affected Vendors & Products
Exploit & PoC Resources
All References (1)
Quick Facts
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2021-30869 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts
- !CISA KEV: Federal agencies must patch per BOD 22-01 timeline
- !Active exploitation confirmed — treat as P1