What is the severity of CVE-2021-30983?

CVE-2021-30983 has a CVSS Base Score of 7.8/10 and is classified as High severity. It is important to assess the risk based on your specific environment.

How do I fix CVE-2021-30983?

Remediation typically involves updating the affected software products to the latest patched version. Refer to the 'Affected Products' and 'Remediation' sections on this page for specific mitigation steps and vendor advisories.

Home→Vulnerabilities→CVE-2021-30983

Active Exploitation

CVE-2021-30983

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.

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Confirmed Active Exploitation

This vulnerability is listed in the CISA KEV Catalog. Federal agencies are mandated to patch immediately. Immediate remediation is required.

Exploitation Probability (EPSS)

Low Priority

0.68%

The Exploit Prediction Scoring System (EPSS) uses machine learning to estimate the probability that a vulnerability will be exploited in the wild within the next 30 days.

0% (Theoretical)100% (Certainty)

7-Day Exploitation Trend

Vulnerability Timeline

2 events

Aug 24, 2021

Vulnerability Disclosed

Published to component-level vulnerability database.

Oct 23, 2025

Last Updated

Record updated with new analysis or tags.

Threat Actor Attribution

PREMIUM INTEL

Associated Groups:Lazarus Group, APT28

Ransomware Campaigns:LockBit 3.0, BlackCat

IoCs (Indicators):14 IPs, 3 Hashes

Remediation & Mitigation

SOLUTION

Official patches and mitigation steps are available for this vulnerability.

# Update Command
apt-get update && apt-get upgrade -y specific-package
# Verify installation
dpkg -l | grep package-name

Affected Products

2 Total

apple/ipadosAll Versions

apple/iphone_osAll Versions

References

https://support.apple.com/en-us/HT212976Apple

Release NotesVendor Advisory

https://support.apple.com/en-us/HT212976Apple

Release NotesVendor Advisory

https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-30983CISA

US Government Resource

Am I Vulnerable?

Check your domain or package.json for CVE-2021-30983 exposure.

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Vulnerability Details

CVSS Base Score

7.8/ 10

Vector

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Published Date

Aug 24, 2021

Last Modified

Oct 23, 2025

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