What’s Vulnerable › Vulnerabilities

CVE-2021-30836

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-10-28 · updated 2026-06-17
• Weakness: CWE-125

Description

An out-of-bounds read was addressed with improved input validation. This issue is fixed in iOS 14.8 and iPadOS 14.8, tvOS 15, watchOS 8, iOS 15 and iPadOS 15. Processing a maliciously crafted audio file may disclose restricted memory.

Affected products

• Apple iPadOS: before 14.8 — fixed in 14.8
• Apple Iphone Os: before 14.8 — fixed in 14.8
• Apple macOS: before 12.0.1 — fixed in 12.0.1
• Apple Safari: before 15.0.0 — fixed in 15.0.0
• Apple tvOS: before 15.0 — fixed in 15.0
• Apple watchOS: before 8.0 — fixed in 8.0

How to fix

Upgrade to a fixed version: Apple iPadOS 14.8; Apple Iphone Os 14.8; Apple macOS 12.0.1; Apple Safari 15.0.0; Apple tvOS 15.0; Apple watchOS 8.0. Check the vendor advisory for mitigations.

References

• http://www.openwall.com/lists/oss-security/2021/12/20/6
• https://support.apple.com/en-us/HT212807
• https://support.apple.com/en-us/HT212814
• https://support.apple.com/en-us/HT212815
• https://support.apple.com/en-us/HT212819
• https://support.apple.com/kb/HT212816
• https://support.apple.com/kb/HT212869
• http://www.openwall.com/lists/oss-security/2021/12/20/6
• https://support.apple.com/en-us/HT212807
• https://support.apple.com/en-us/HT212814
• https://support.apple.com/en-us/HT212815
• https://support.apple.com/en-us/HT212819

Get alerted when CVE-2021-30836 or the next vulnerability affects your stack