What’s Vulnerable › Vulnerabilities

CVE-2021-30983: Apple iOS and iPadOS Buffer Overflow Vulnerability

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: yes — in CISA KEV since 2022-06-27
• EPSS: 2.9% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-08-24 · updated 2026-06-17
• Weakness: CWE-120

Description

A buffer overflow issue was addressed with improved memory handling. This issue is fixed in iOS 15.2 and iPadOS 15.2. An application may be able to execute arbitrary code with kernel privileges.

Affected products

• Apple iPadOS: before 15.2 — fixed in 15.2
• Apple Iphone Os: before 15.2 — fixed in 15.2

How to fix

Upgrade to a fixed version: Apple iPadOS 15.2; Apple Iphone Os 15.2. Check the vendor advisory for mitigations.

References

• https://support.apple.com/en-us/HT212976
• https://support.apple.com/en-us/HT212976
• https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-30983

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