# CVE-2021-30983: Apple iOS and iPadOS Buffer Overflow Vulnerability

> CVE-2021-30983: Apple iOS and iPadOS Buffer Overflow Vulnerability. CVSS 7.8 (CVSS 3.1), in CISA KEV.

Canonical: https://rewindex.com/cve/CVE-2021-30983
Last updated: 2025-10-21T23:25:36Z

- Published: 2021-08-24 18:51 UTC · Updated: 2025-10-21 23:25 UTC · Assigner: apple
- CVSS: 7.8 (CVSS 3.1) · Severity: High · Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- EPSS: 2.9%, 87th percentile (scored 2026-10-25)
- CISA KEV: yes, added 2022-06-27, federal due date 2022-07-18, ransomware use: Unknown

## Description

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.

## CISA required action

Apply updates per vendor instructions.

## Affected vendors and products

- Apple: iOS and iPadOS

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2021-30983)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2021-30983)
- [https://support.apple.com/en-us/HT212976](https://support.apple.com/en-us/HT212976)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2021-30983 · Markdown: https://rewindex.com/cve/CVE-2021-30983.md · JSON: https://rewindex.com/api/v1/cves/CVE-2021-30983 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T02:15:39.901Z