CVE-2021-30848

Severity: high (CVSS 7.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2021-10-19 · updated 2026-06-17
Weakness: CWE-787

Description

A memory corruption issue was addressed with improved memory handling. This issue is fixed in iOS 14.8 and iPadOS 14.8, Safari 15, iOS 15 and iPadOS 15. Processing maliciously crafted web content may lead to code execution.

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 — fixed in 15.0

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. Check the vendor advisory for mitigations.

References

http://seclists.org/fulldisclosure/2021/Oct/60
http://seclists.org/fulldisclosure/2021/Oct/61
http://www.openwall.com/lists/oss-security/2021/10/26/9
http://www.openwall.com/lists/oss-security/2021/10/27/1
http://www.openwall.com/lists/oss-security/2021/10/27/2
http://www.openwall.com/lists/oss-security/2021/10/27/4
https://support.apple.com/en-us/HT212807
https://support.apple.com/en-us/HT212814
https://support.apple.com/en-us/HT212816
https://support.apple.com/kb/HT212869
http://seclists.org/fulldisclosure/2021/Oct/60
http://seclists.org/fulldisclosure/2021/Oct/61

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