CVE-2021-30858
- State
- Published
- Severity
- 8.8 High
- Published
- Aug 24, 2021
- Updated
- Oct 21, 2025
- Reserved
- Apr 13, 2021
Description
A use after free issue was addressed with improved memory management. This issue is fixed in iOS 14.8 and iPadOS 14.8, macOS Big Sur 11.6. Processing maliciously crafted web content may lead to arbitrary code execution. Apple is aware of a report that this issue may have been actively exploited.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 8.8 High | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H | CISA-ADP |
Weaknesses
- CWE-416 Use After Free
Affected Products
| Product | Versions |
|---|---|
macOSApple |
|
iOSApple |
|
References
- https://support.apple.com/en-us/HT212804
- https://support.apple.com/en-us/HT212807
- 20210917 APPLE-SA-2021-09-13-3 macOS Big Sur 11.6mailing-list
- 20210917 APPLE-SA-2021-09-13-1 iOS 14.8 and iPadOS 14.8mailing-list
- 20210917 APPLE-SA-2021-09-13-5 Safari 14.1.2mailing-list
- [oss-security] 20210920 WebKitGTK and WPE WebKit Security Advisory WSA-2021-0005mailing-list
- FEDORA-2021-c00e45b6c0vendor-advisory
- 20210921 APPLE-SA-2021-09-20-6 Additional information for APPLE-SA-2021-09-13-1 iOS 14.8 and iPadOS 14.8mailing-list
- 20210921 APPLE-SA-2021-09-20-7 Additional information for APPLE-SA-2021-09-13-3 macOS Big Sur 11.6mailing-list
- DSA-4975vendor-advisory
- DSA-4976vendor-advisory
- https://support.apple.com/kb/HT212824
- 20210924 APPLE-SA-2021-09-23-1 iOS 12.5.5mailing-list
- FEDORA-2021-edf6957b7dvendor-advisory
- [oss-security] 20211026 WebKitGTK and WPE WebKit Security Advisory WSA-2021-0006mailing-list
- [oss-security] 20211027 Re: WebKitGTK and WPE WebKit Security Advisory WSA-2021-0006mailing-list
- [oss-security] 20211027 Re: WebKitGTK and WPE WebKit Security Advisory WSA-2021-0006mailing-list
- [oss-security] 20211027 Re: WebKitGTK and WPE WebKit Security Advisory WSA-2021-0006mailing-list
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-30858government-resource
Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.