CVE-2021-30883: Apple Multiple Products Memory Corruption Vulnerability

CVE-2021-30883: Technical Deep-Dive (Auto Refreshed)

Generated on 2026-03-30T13:16:49.263Z. This file is automatically regenerated every 30 minutes by the CVE AI enrichment job using web sources (NVD, MITRE, CISA KEV, GitHub).

Executive Technical Summary

A memory corruption issue was addressed with improved memory handling. This issue is fixed in iOS 15.0.2 and iPadOS 15.0.2, macOS Monterey 12.0.1, iOS 14.8.1 and iPadOS 14.8.1, tvOS 15.1, watchOS 8.1, macOS Big Sur 11.6.1. An application may be able to execute arbitrary code with kernel privileges. Apple is aware of a report that this issue may have been actively exploited..

Context preserved from previous revision: A memory corruption issue was addressed with improved memory handling. This issue is fixed in iOS 15.0.2 and iPadOS 15.0.2, macOS Monterey 12.0.1, iOS 14.8.1 and iPadOS 14.8.1, tvOS 15.1, watchOS 8.1, macOS Big Sur 11.6.1. An application may be able to execute arbitrary code with kernel privileges. Apple is aware of a report that this issue may have been actively exploited.. Notes: Ostorlab KEV: One-command to detect most remotely known exploitable vulnerabilities. Sourced from CISA KEV, Google's Tsunami, Ostorlab's Asteroid and Bug Bounty programs.

Technical Details

CVE: CVE-2021-30883
KEV date added: 2022-05-23
KEV due date: 2022-06-13
NVD published: 2021-08-24
NVD modified: 2025-10-23
MITRE modified: 2025-10-21
CVSS base score: 7.8
CVSS vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CVSS exploitability score: 1.8
CVSS impact score: 5.9
Attack vector: Local
Attack complexity: Low
Privileges required: None
User interaction: Required
Scope: Unchanged
Confidentiality impact: High
Integrity impact: High
Availability impact: High

Versions and Products Impacted

apple / ipados (versions: < 14.8.1)
apple / ipados (versions: >= 15.0, < 15.0.2)
apple / iphone os (versions: < 14.8.1)
apple / iphone os (versions: >= 15.0, < 15.0.2)
apple / macos (versions: >= 11.0, < 11.6.1)
apple / macos (versions: 12.0)
apple / tvos (versions: < 15.1)
apple / watchos (versions: < 8.1)
Apple / iOS and iPadOS (versions: unspecified)
Apple / macOS (versions: unspecified)

Weakness Classification

CWE-787
An application may be able to execute arbitrary code with kernel privileges. Apple is aware of a report that this issue may have been actively exploited.

Repositories for Lab Validation (Public Examples)

Ostorlab/KEV | stars: 608 | updated: 2026-03-23 | https://github.com/Ostorlab/KEV
Notes: Ostorlab KEV: One-command to detect most remotely known exploitable vulnerabilities. Sourced from CISA KEV, Google's Tsunami, Ostorlab's Asteroid and Bug Bounty programs.
Proteas/apple-cve | stars: 165 | updated: 2026-03-26 | https://github.com/Proteas/apple-cve
Notes: apple cve list
w4zu/Debian_security | stars: 0 | updated: 2026-03-30 | https://github.com/w4zu/Debian_security
Notes: DSA and DLA for Debian last 14 days
pawan-shivarkar/List-of-CVE-s- | stars: 0 | updated: 2025-08-13 | https://github.com/pawan-shivarkar/List-of-CVE-s-
Notes: Contains List of CVE's that I have found (Individual + Collaborative work)

People and Organizations Mentioned

apple
Multiple Products
Ostorlab
Proteas
w4zu
pawan-shivarkar

Practical Defensive Validation (Authorized Only)

Use only isolated environments and systems you own or are explicitly authorized to test.
Snapshot infrastructure before validation and preserve baseline logs (EDR, SIEM, OS, app).
Inventory apple / ipados (versions: < 14.8.1) assets and confirm exact vulnerable versions with automated checks.
Patch in staged environments and validate closure with scanners + service health checks.
Map detections to MITRE ATT&CK tactics relevant to your environment and tune alert quality.

References

NVD record: https://nvd.nist.gov/vuln/detail/CVE-2021-30883
MITRE CVE record: https://www.cve.org/CVERecord?id=CVE-2021-30883
CISA KEV Catalog: https://www.cisa.gov/known-exploited-vulnerabilities-catalog
CISA KEV JSON feed: https://www.cisa.gov/sites/default/files/feeds/known_exploited_vulnerabilities.json
KEV notes: https://nvd.nist.gov/vuln/detail/CVE-2021-30883
https://support.apple.com/en-us/HT212846
https://support.apple.com/en-us/HT212868
https://support.apple.com/en-us/HT212869
https://support.apple.com/en-us/HT212872
https://support.apple.com/en-us/HT212874
https://support.apple.com/en-us/HT212876
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-30883
Repository example: https://github.com/Ostorlab/KEV
Repository example: https://github.com/Proteas/apple-cve
Repository example: https://github.com/w4zu/Debian_security
Repository example: https://github.com/pawan-shivarkar/List-of-CVE-s-

This content is for defensive security training and authorized validation only.