CVE-2021-30983
Published: June 27, 2022
Official Description
Apple iOS and iPadOS contain a buffer overflow vulnerability that could allow an application to execute code with kernel privileges.
CISA KEV Advisory
Apple iOS and iPadOS Buffer Overflow Vulnerability
Apple iOS and iPadOS contain a buffer overflow vulnerability that could allow an application to execute code with kernel privileges.
Apply updates per vendor instructions.
Risk Analysis
This buffer overflow vulnerability in Apple iOS and iPadOS could allow an application to execute code with kernel privileges. Its inclusion in CISA's KEV catalog and active exploitation in the wild highlight its critical nature, despite a low EPSS score indicating a lower overall exploitation probability across all internet-facing systems. Successful exploitation grants an attacker full control over the affected device.
This vulnerability is actively exploited in the wild, as confirmed by its inclusion in CISA's KEV catalog. Exploitation allows an application to execute code with kernel privileges.
Apply the latest security updates from Apple for iOS and iPadOS. Ensure all applications are from trusted sources and regularly review app permissions.
Technical Analysis
CVE-2021-30983 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-2021-30983 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-2021-30983 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