CVE-2016-4656
Published: May 24, 2022
Official Description
A memory corruption vulnerability in Apple iOS kernel allows attackers to execute code in a privileged context or cause a denial-of-service (DoS) via a crafted application.
CISA KEV Advisory
Apple iOS Memory Corruption Vulnerability
A memory corruption vulnerability in Apple iOS kernel allows attackers to execute code in a privileged context or cause a denial-of-service (DoS) via a crafted application.
Apply updates per vendor instructions.
Risk Analysis
A memory corruption vulnerability in the Apple iOS kernel allows attackers to execute code with privileged context or cause a denial-of-service. The high EPSS score of 0.67910 indicates a high likelihood of exploitation, and its presence in CISA's KEV confirms active exploitation.
This vulnerability is actively exploited in the wild, as confirmed by its inclusion in CISA's KEV. Exploitation likely occurs through a crafted application.
Apple iOS users should update their devices to the latest patched versions. Only install applications from trusted sources to minimize risk.
Technical Analysis
CVE-2016-4656 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-2016-4656 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-2016-4656 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