CVE-2021-30937

HIGH

macOS Big Sur <11.6.2 - Memory Corruption

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2021-30937. PoCs published by realrodri.

AI-analyzed exploit summary This repository contains a functional exploit for CVE-2021-30937, targeting iOS 15.0-15.1.1. The exploit leverages a bytecopy vulnerability in the multicast handling of the kernel, using techniques like heap spraying and kernel memory manipulation to achieve local privilege escalation.

Description

A memory corruption vulnerability was addressed with improved locking. This issue is fixed in macOS Big Sur 11.6.2, tvOS 15.2, macOS Monterey 12.1, Security Update 2021-008 Catalina, iOS 15.2 and iPadOS 15.2, watchOS 8.3. A malicious application may be able to execute arbitrary code with kernel privileges.

Exploits (1)

nomisec WORKING POC
by realrodri · poc
https://github.com/realrodri/ExploiteameEsta

This repository contains a functional exploit for CVE-2021-30937, targeting iOS 15.0-15.1.1. The exploit leverages a bytecopy vulnerability in the multicast handling of the kernel, using techniques like heap spraying and kernel memory manipulation to achieve local privilege escalation.

Classification
Working Poc 95%
Attack Type
Lpe
Complexity
Complex
Reliability
Racy
Target: iOS 15.0-15.1.1
No auth needed
Prerequisites: iOS device running 15.0-15.1.1 · Physical or local access to the device
mistral-large-3 · analyzed Feb 18, 2026 Full analysis →

References (7)

Core 7
Core References
Vendor Advisory x_refsource_misc
https://support.apple.com/en-us/HT212975
Vendor Advisory x_refsource_misc
https://support.apple.com/en-us/HT212976
Vendor Advisory x_refsource_misc
https://support.apple.com/en-us/HT212978
Vendor Advisory x_refsource_misc
https://support.apple.com/en-us/HT212979
Vendor Advisory x_refsource_misc
https://support.apple.com/en-us/HT212981
Vendor Advisory x_refsource_misc
https://support.apple.com/en-us/HT212980

Scores

CVSS v3 7.8
EPSS 0.1802
EPSS Percentile 96.8%
Attack Vector LOCAL
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Details

CWE
CWE-787
Status published
Products (7)
apple/ipados < 15.2
apple/iphone_os < 15.2
apple/mac_os_x 10.15.7 security_update_2020 (9 CPE variants)
apple/mac_os_x 10.15 - 10.15.7
apple/macos 11.0 - 11.6.2
apple/tvos < 15.2
apple/watchos < 8.3
Published Aug 24, 2021
Tracked Since Feb 18, 2026